Publications (116)
Microquasar observations with the MAGIC telescope
T. Y. Saito, R. Zanin, P. Bordas +7
Microquasars, X-ray binaries displaying relativistic jets driven by accretion onto a compact object, are some of the most efficient accelerators in the Galaxy. Theoretical models p…
Studying the non-thermal lobes of IRAS 16547-4247 through a multi-wavelength approach
P. Munar-Adrover, V. Bosch-Ramon, J. M. Paredes +1
In the recent years massive protostars have been suggested to be high-energy emitters. Among the best candidates is IRAS 16547-4247, a protostar that presents a powerful outflow wi…
MAGIC Gamma-ray Telescope Observation of the Perseus Cluster of Galaxies: implications for cosmic rays, dark matter, and NGC1275
The MAGIC Collaboration, J. AleksiÄ, L. A. Antonelli +152
The Perseus galaxy cluster was observed by the MAGIC Cherenkov telescope for a total effective time of 24.4 hr during 2008 November and December. The resulting upper limits on the…
The MAGIC highlights of the gamma ray binary LS I +61 303
T. Jogler, N. Puchades, O. Blanch Bigas +10
The discovery of emission of TeV gamma rays from X-ray binaries has triggered an intense effort to better understand the particle acceleration, absorption, and emission mechanisms…
Clues to unveil the emitter in LS 5039: powerful jets vs colliding winds
V. Bosch-Ramon, D. Khangulyan, F. A. Aharonian
LS 5039 is among the most interesting VHE sources in the Galaxy. Two scenarios have been put forward to explain the observed TeV radiation: jets vs pulsar winds. The source has bee…
MAGIC observation of the GRB080430 afterglow
MAGIC Collaboration, J. AleksiÄ, H. Anderhub +151
Context: Gamma-ray bursts are cosmological sources emitting radiation from the gamma-rays to the radio band. Substantial observational efforts have been devoted to the study of gam…
Observations of the Blazar 3C 66A with the MAGIC Telescopes in Stereoscopic Mode
The MAGIC Collaboration, J. AleksiÄ, L. A. Antonelli +153
We report new observations of the intermediate-frequency peaked BL Lacertae object 3C 66A with the MAGIC telescopes. The data sample we use were taken in 2009 December and 2010 Jan…
Correlated X-ray and Very High Energy emission in the gamma-ray binary LS I +61 303
The MAGIC Collaboration, H. Anderhub, L. A. Antonelli +153
The discovery of very high energy (VHE) gamma-ray emitting X-ray binaries has triggered an intense effort to better understand the particle acceleration, absorption, and emission m…
Simulations of stellar/pulsar wind interaction along one full orbit
V. Bosch-Ramon, M. V. Barkov, D. Khangulyan +1
The winds from a non-accreting pulsar and a massive star in a binary system collide forming a bow-shaped shock structure. The Coriolis force induced by orbital motion deflects the…
On the interaction of microquasar jets with stellar winds
M. Perucho, V. Bosch-Ramon
Strong interactions between jets and stellar winds at binary system spatial scales could occur in high-mass microquasars. We study here, mainly from a dynamical but also a radiativ…
3D RMHD simulations of jet-wind interactions in High Mass X-ray Binaries
J. López-Miralles, M. Perucho, J. M. Martà +2
The interaction of jets in High-Mass X-ray Binaries (HMXBs) with the strong winds driven by the hot companion star in the vicinity of the compact object is fundamental to understan…
Gamma rays from red giant wind bubbles entering the jets of elliptical host blazars
N. Torres-AlbÃ, V. Bosch-Ramon
Blazars in elliptical hosts have a population of red giants surrounding their jet. These stars can carry large wind-blown bubbles into the jets, leading to gamma-ray emission throu…
Studying the Structure of the Stellar Wind in LS 5039
V. Bosch-Ramon
The binary LS 5039 is a non-thermal X-ray emitter that presents jet-like radio structures, and is also one of the most misterious TeV sources in our Galaxy. The presence of an O-ty…
Large-scale flow dynamics and radiation in pulsar gamma-ray binaries
V. Bosch-Ramon, M. V. Barkov
Several gamma-ray binaries show extended X-ray emission that may be associated to interactions of an outflow with the medium. Some of these systems are, or may be, high-mass binari…
Gamma-ray observations of MAXI J1820+070 during the 2018 outburst
H. Abe, S. Abe, V. A. Acciari +439
MAXI J1820+070 is a low-mass X-ray binary with a black hole as a compact object. This binary underwent an exceptionally bright X-ray outburst from March to October 2018, showing ev…
Microquasar hadronic jets at very high-energy gamma-rays
V. Bosch-Ramon, F. A. Aharonian, J. M. Paredes
Microquasars (MQs) present emission over the whole spectrum, from radio wavelengths to gamma-rays. The microquasar spectral energy distribution is very complex, being a signature o…
3D simulations of wind-jet interaction in massive X-ray binaries
M. Perucho, V. Bosch-Ramon, D. Khangulyan
High-mass microquasars may produce jets that will strongly interact with surrounding stellar winds on binary system spatial scales. We study the dynamics of the collision between a…
Relativistic hydrodynamics simulations of supernova explosions within extragalactic jets
B. Longo, M. Perucho, V. Bosch-Ramon +2
Jets in active galactic nuclei have to cross significant distances within their host galaxies, meeting large numbers of stars of different masses and evolution stages in their path…
Gamma rays from clumpy wind-jet interactions in high-mass microquasars
V. M. de la Cita, S. del Palacio, V. Bosch-Ramon +3
The stellar winds of the massive stars in high-mass microquasars are thought to be inhomogeneous. The interaction of these inhomogeneities, or clumps, with the jets of these object…
Study of the Spectral and Temporal Characteristics of X-Ray Emission of the Gamma-Ray Binary LS 5039 with Suzaku
T. Takahashi, T. Kishishita, Y. Uchiyama +6
We report on the results from Suzaku broadband X-ray observations of the galactic binary source LS5039. The Suzaku data, which have continuous coverage of more than one orbital per…
A numerical model for the gamma-ray emission of the microquasar LS 5039
V. Bosch-Ramon, J. M. Paredes
The possible association between the microquasar LS 5039 and the EGRET source 3EG J1824-1514 suggests that microquasars could also be sources of high energy gamma-rays. In this pap…
Radio continuum and near-infrared study of the MGRO J2019+37 region
J. M. Paredes, J. Marti, C. H. Ishwara-Chandra +10
(abridged) MGRO J2019+37 is an unidentified extended source of VHE gamma-rays originally reported by the Milagro Collaboration as the brightest TeV source in the Cygnus region. Its…
Leptonic emission from microquasar jets: from radio to very high-energy gamma-rays
V. Bosch-Ramon, J. M. Paredes, G. E. Romero
Microquasars are sources of very high-energy gamma-rays and, very probably, high-energy gamma-ray emitters. We propose a model for a jet that can allow to give accurate observation…
Spectral energy distribution of gamma-ray binaries: Sources and Processes
V. Bosch-Ramon
Gamma-ray binaries are suitable sources to study high-energy processes in jets and outflows in general. In the last years, there has been a lot of activity in the field of gamma-ra…
Detection of VHE γ-rays from HESS J0632+057 during the 2011 February X-ray outburst with the MAGIC Telescopes
The MAGIC Collaboration, J. AleksiÄ, E. A. Alvarez +158
The very high energy (VHE) γ-ray source HESS J0632+057 has recently been confirmed to be a γ-ray binary. The optical counterpart is the Be star MWC 148, and a compact object of u…
Gamma-ray emission from massive young stellar objects
A. T. Araudo, G. E. Romero, V. Bosch-Ramon +1
Massive stars form in dense and massive molecular cores. The exact formation mechanism is unclear, but it is possible that some massive stars are formed by processes similar to tho…
Theoretical overview on high-energy emission in microquasars
V. Bosch-Ramon
Microquasar (MQ) jets are sites of particle acceleration and synchrotron emission. Such synchrotron radiation has been detected coming from jet regions of different spatial scales,…
On the interaction of jets with stellar winds in XRBs
M. Perucho, V. Bosch-Ramon, D. Khangulyan
We present the first three-dimensional simulations of the evolution of a microquasar jet inside the binary-star system. The aim is to study the interaction of these jets with the s…
Identifying variable gamma-ray sources through radio observations
J. M. Paredes, J. Marti, D. F. Torres +4
We present preliminary results of a campaign undertaken with different radio interferometers to observe a sample of the most variable unidentified EGRET sources. We expect to detec…
Electromagnetic radiation initiated by hadronic jets from microquasars in the ISM
V. Bosch-Ramon, F. A. Aharonian, J. M. Paredes
Microquasars are potential candidates to produce a non-negligible fraction of the observed galactic cosmic rays. The protons accelerated at the jet termination shock interact with…
Star-Jet Interactions and Gamma-Ray Outbursts from 3c454.3
M. V. Barkov, D. V. Khangulyan, V. Bosch-Ramon +2
We propose a model to explain the ultra-bright GeV gamma-ray flares observed from the blazar \c454. The model is based on the concept of a relativistic jet interacting with compact…
Enabling population studies on wind-driven Galactic binary systems
B. Marcote, P. Benaglia, V. Bosch-Ramon +8
Galactic binaries driven by stellar wind shocks, such as colliding wind binaries (CWBs) and gamma-ray binaries (gBs), harbor one of the most efficient particle acceleration engines…
Radio detections towards unidentified variable EGRET sources
J. M. Paredes, J. Marti, C. H. Ishwara-Chandra +6
Context. A considerable fraction of the gamma-ray sources discovered with the Energetic Gamma-Ray Experiment Telescope (EGRET) remain unidentified. The EGRET sources that have been…
A microquasar model applied to unidentified gamma-ray sources
V. Bosch-Ramon, J. M. Paredes, G. E. Romero +1
Among unidentified gamma-ray sources in the galactic plane, there are some that present significant variability and have been proposed to be high-mass microquasars. To deepen the s…
Secondary emission behind the radio outflows in gamma-ray binaries?
V. Bosch-Ramon
Several binary systems consisting of a massive star and a compact object have been detected above 100 GeV in the Galaxy. In most of these sources, gamma-rays show a modulation asso…
Broad-band electromagnetic radiation from microquasars interacting with ISM
V. Bosch-Ramon, F. A. Aharonian, J. M. Paredes
Microquasars (MQs) are galactic objects with relativistic jets that constitute a source population which can be responsible for production of a non-negligible fraction of the obser…
The MAGIC Project: Contributions to ICRC 2007
J. Albert, E. Aliu, H. Anderhub +142
The MAGIC Project: Contributions to ICRC 2007, Merida, Mexico. Contents pages for the Contribution on behalf of the MAGIC Collaboration to the 30th ICRC that took place in July 200…
Jet/medium interactions at large scales
P. Bordas, V. Bosch-Ramon, M. Perucho
High energy emission can be produced in the interaction sites of both galactic and extragalactic jets with the surrounding medium. We have developed a radiative model that accounts…
Radio to TeV radiation initiated by termination of hadronic jets from microquasars in the ISM
V. Bosch-Ramon, F. A. Aharonian, J. M. Paredes
Microquasars (MQs) are potential candidates to produce a non-negligible fraction of the observed galactic cosmic rays. The protons accelerated at the jet termination shock interact…
Clumpy stellar winds and high-energy emission in high-mass binaries hosting a young pulsar
V. Bosch-Ramon
High-mass binaries hosting young pulsars can be powerful gamma-ray emitters. The stellar wind of the massive star in the system is expected to be clumpy. Since the high-energy emis…
Evidence of coupling between the thermal and nonthermal emission in the gamma-ray binary LS I +61 303
X. Paredes-Fortuny, M. Ribó, V. Bosch-Ramon +3
The gamma-ray binary LS I +61 303 is composed of a Be star and a compact companion orbiting in an eccentric orbit. Variable flux modulated with the orbital period of ~26.5 d has be…
Powerful non-thermal emission in black-hole powered sources
V. Bosch-Ramon
Powerful non-thermal emission has been detected coming from relativistic collimated outflows launched in the vicinity of black holes of a very wide range of masses, from few to $\s…
On the multiwavelength spectrum of the microquasar 1E 1740.7-2942
V. Bosch-Ramon, G. E. Romero, J. M. Paredes +3
Context. The microquasar 1E 1740.7-2942 is a source located in the direction of the Galactic Center. It has been detected at X-rays, soft gamma-rays, and in the radio band, showing…
Exploring high-energy processes in binary systems with the Cherenkov Telescope Array
J. M. Paredes, W. Bednarek, P. Bordas +20
Several types of binary systems have been detected up to now at high and very high gamma-ray energies, including microquasars, young pulsars around massive stars and colliding wind…
Search for very-high-energy gamma-ray emission from the microquasar Cygnus X-1 with the MAGIC telescopes
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +144
The microquasar Cygnus X-1 displays the two typical soft and hard X-ray states of a black-hole transient. During the latter, Cygnus X-1 shows a one-sided relativistic radio-jet. Re…
Spectral and variability properties of LS 5039 from radio to very high-energy gamma-rays
V. Bosch-Ramon, J. M. Paredes, G. E. Romero
Microquasars are X-ray binaries with relativistic jets. The microquasar LS 5039 turned out to be the first high-energy gamma-ray microquasar candidate due to its likely association…
Thermal X-ray Emission from the Shocked Stellar Wind of Pulsar Gamma-ray Binaries
V. Zabalza, V. Bosch-Ramon, J. M. Paredes
Gamma-ray loud X-ray binaries are binary systems that show non-thermal broadband emission from radio to gamma rays. If the system comprises a massive star and a young non-accreting…
The high-energy emission from HD~93129A near periastron
S. del Palacio, F. GarcÃa, D. Altamirano +12
We conducted an observational campaign towards one of the most massive and luminous colliding wind binaries in the Galaxy, HD~93129A, close to its periastron passage in 2018. Durin…
Radio emission from high-mass binaries with non-accreting pulsars
V. Bosch-Ramon
Binary systems that harbor a non-accreting pulsar are efficient non-thermal emitters, from radio to gamma rays. This broadband emission is thought to come from the region where the…
Spectral Energy Distribution of Markarian 501: Quiescent State vs. Extreme Outburst
The VERITAS Collaboration, V. A. Acciari, T. Arlen +225
The very high energy (VHE; E > 100 GeV) blazar Markarian 501 has a well-studied history of extreme spectral variability and is an excellent laboratory for studying the physical pro…
Detection of the gamma-ray binary LS I +61 303 in a low flux state at Very High Energy gamma-rays with the MAGIC Telescopes in 2009
MAGIC Collaboration, J. AleksiÄ, E. A. Alvarez +153
We present very high energy (VHE, E > 100 GeV) γ-ray observations of the γ-ray binary system LS I+61 303 obtained with the MAGIC stereo system between 2009 October and 2010 Janua…
MAGIC TeV Gamma-Ray Observations of Markarian 421 during Multiwavelength Campaigns in 2006
MAGIC Collaboration, J. AleksiÄ, L. A. Antonelli +145
The Major Atmospheric Gamma Imaging Cerenkov (MAGIC) telescope participated in three multiwavelength (MWL) campaigns, observing the blazar Markarian (Mkn) 421 during the nights of…
Relativistic stellar jets: dynamics and non-thermal radiation
V. Bosch-Ramon
Relativistic stellar jets, produced in binary systems called microquasars, propagate through media with different spatial scales releasing their energy in the form of work and radi…
On the origin of correlated X-ray/VHE emission from LS I +61 303
V. Zabalza, J. M. Paredes, V. Bosch-Ramon
The MAGIC collaboration has recently reported correlated X-ray and very high-energy gamma-ray emission from the gamma-ray binary LS I +61 303 during ~60% of one orbit. These observ…
Detection of very high energy gamma-ray emission from the Perseus cluster head-tail galaxy IC 310 by the MAGIC telescopes
MAGIC Collaboration, J. AleksiÄ, L. A. Antonelli +151
We report on the detection with the MAGIC telescopes of very high energy gamma-rays from IC 310, a head-tail radio galaxy in the Perseus galaxy cluster, observed during the interva…
The termination region of high-mass microquasar jets
V. Bosch-Ramon, M. Perucho, P. Bordas
The environment of high-mass X-ray binaries can be characterized either by the SNR that forms these systems, or by the wind from the companion massive star. These regions should be…
Search for an extended VHE gamma-ray emission from Mrk 421 and Mrk 501 with the MAGIC Telescope
MAGIC Collaboration, J. AleksiÄ, L. A. Antonelli +148
Context: Part of the very high energy -ray radiation coming from extragalactic sources is absorbed through the pair production process on the extragalactic background light pho…
Modeling the effects of clumpy winds in the high-energy light curves of γ-ray binaries
E. Kefala, V. Bosch-Ramon
High-mass gamma-ray binaries are powerful nonthermal galactic sources, some of them hosting a pulsar whose relativistic wind interacts with a likely inhomogeneous stellar wind. So…
Exploring Particle Acceleration in Gamma-Ray Binaries
V. Bosch-Ramon, F. M. Rieger
Binary systems can be powerful sources of non-thermal emission from radio to gamma rays. When the latter are detected, then these objects are known as gamma-ray binaries. In this w…
Non thermal emission from microquasar/ISM interaction
P. Bordas, V. Bosch-Ramon, J. M. Paredes +1
The interaction of microquasar jets with their environment can produce non-thermal radiation as is the case for extragalactic outflows impacting on their surroundings. We have deve…
MAGIC Collaboration: Contributions to the 31st International Cosmic Ray Conference (ICRC 2009)
The MAGIC Collaboration, H. Anderhub, L. A. Antonelli +145
Index entry listing the contributed papers of the MAGIC collaboration to the 31th International Cosmic Ray Conference (ICRC 2009), July 7-15 2009, Åódź, Poland. The individual p…
Evidence for non-thermal X-ray emission from the double WR colliding-wind binary Apep
S. del Palacio, F. GarcÃa, M. De Becker +5
Context: Massive colliding-wind binaries (CWBs) can be non-thermal sources. The emission produced in their wind-collision region (WCR) encodes information of both the shocks proper…
Exploring the connection between the stellar wind and the non-thermal emission in LS 5039
V. Bosch-Ramon, C. Motch, M. Ribo +5
LS 5039 has been observed with several X-ray instruments so far. The source presents X-ray variability at orbital timescales in flux and photon index. The system harbors an O-type…
Multi-zone non-thermal radiative model for stellar bowshocks
S. del Palacio, V. Bosch-Ramon, A. L. Müller +1
Context: Runaway stars produce bowshocks that are usually observed at infrared (IR) wavelengths. Non-thermal radio emission has been detected so far only from the bowshock of BD+43…
Magnetar-like flares behind the high-energy emission in LS 5039
V. Bosch-Ramon, M. V. Barkov
LS 5039 hosts a high-mass star, and a compact object that might be a strongly magnetized neutron star (NS). This scenario requires a mechanism to power its persistent and strong no…
Fermi~I particle acceleration in converging flows mediated by magnetic reconnection
V. Bosch-Ramon
Context. Converging flows with strong magnetic fields of different polarity can accelerate particles through magnetic reconnection. If the particle mean free path is longer than th…
Multifrequency Behavior of Microquasars in the GeV--TeV era: A review
V. Bosch-Ramon
Microquasars are X-ray binaries that present non-thermal radio jets. Efficient particle acceleration can take place in different regions of the jets of microquasars. The accelerate…
Microquasar models for 3EG J1828+0142 and 3EG J1735-1500
V. Bosch-Ramon, J. M. Paredes, G. E. Romero +1
Microquasars are promising candidates to emit high-energy gamma-rays. Moreover, statistical studies show that variable EGRET sources at low galactic latitudes could be associated w…
A broadband leptonic model for gamma-ray emitting microquasars
V. Bosch-Ramon, G. E. Romero, J. M. Paredes
Observational and theoretical studies point to microquasars (MQs) as possible counterparts of a significant fraction of the unidentified gamma-ray sources detected so far. At prese…
INTEGRAL serendipitous detection of the gamma-ray microquasar LS 5039
P. Goldoni, M. Ribo, T. Di Salvo +3
LS 5039 is the only X-ray binary persistently detected at TeV energies by the Cherenkov HESS telescope. It is moreover a gamma-ray emitter in the GeV and possibly MeV energy ranges…
Deep GMRT radio observations and a multi-wavelength study of the region around HESS J1858+020
J. M. Paredes, C. H. Ishwara-Chandra, V. Bosch-Ramon +3
There are a number of very high energy sources in the Galaxy that remain unidentified. Multi-wavelength and variability studies, and catalogue searches, are powerful tools to ident…
Star-Jet Interactions and Gamma-Ray Outbursts from 3C454.3
D. V. Khangulyan, M. V. Barkov, V. Bosch-Ramon +2
We propose a model to explain the ultra-bright GeV gamma-ray flares observed from the blazar 3C454.3. The model is based on the concept of a relativistic jet interacting with compa…
Simultaneous multi-frequency observation of the unknown redshift blazar PG 1553+113 in March-April 2008
MAGIC Collaboration, J. AleksiÄ, H. Anderhub +161
The blazar PG 1553+113 is a well known TeV gamma-ray emitter. In this paper, we determine its spectral energy distribution using simultaneous multi-frequency data in order to study…
Gamma-ray excess from a stacked sample of high- and intermediate-frequency peaked blazars observed with the MAGIC telescope
MAGIC Collaboration, J. AleksiÄ, L. A. Antonelli +147
Between 2004 and 2009 a sample of 28 X-ray selected high- and intermediate-frequency peaked blazars with a X-ray flux larger than 2 uJy at 1 keV in the redshift range from 0.018 to…
Large-scale emission from gamma-ray binaries: the case of LS 5039
J. R. Martinez, V. Bosch-Ramon
Abridged abstract: Context: Gamma-ray binaries hosting a non-accreting neutron star and a massive star exhibit multi-wavelength emission on different spatial scales. The interactio…
MAGIC upper limits on the very high energy emission from GRBs
J. Albert, E. Aliu, H. Anderhub +57
The fast repositioning system of the MAGIC Telescope has allowed during its first data cycle, between 2005 and the beginning of year 2006, observing nine different GRBs as possible…
Constraining very-high-energy and optical emission from FRB 121102 with the MAGIC telescopes
MAGIC Collaboration, V. A. Acciari, S. Ansoldi +155
Fast radio bursts (FRBs) are bright flashes observed typically at GHz frequencies with millisecond duration, whose origin is likely extragalactic. Their nature remains mysterious,…
Orbital X-Ray Variability of the Microquasar LS 5039
V. Bosch-Ramon, J. M. Paredes, M. Ribo +3
The properties of the orbit and the donor star in the high mass X-ray binary microquasar LS 5039 indicate that accretion processes should mainly occur via a radiatively driven wind…
Gamma-ray emission from massive star forming regions
A. T. Araudo, G. E. Romero, V. Bosch-Ramon +1
Recent radio observations support a picture for star formation where there is accretion of matter onto a central protostar with the ejection of molecular outflows that can affect t…
Non-thermal emission from secondary pairs in close TeV binary systems
V. Bosch-Ramon, D. Khangulyan, F. A. Aharonian
Massive hot stars produce dense ultraviolet (UV) photon fields in their surroundings. If a very high-energy (VHE) gamma-ray emitter is located close to the star, then gamma-rays ar…
Spectral energy distribution of the gamma-ray microquasar LS 5039
J. M. Paredes, V. Bosch-Ramon, G. E. Romero
The microquasar LS 5039 has recently been detected as a source of very high energy (VHE) -rays. This detection, that confirms the previously proposed association of LS 5039 wit…
A radio and near-infrared mini-survey of the MGRO J2019+37 complex
J. M. Paredes, J. Marti, C. H. Ishwara-Chandra +9
MGRO J2019+37 is an unidentified source of very high energy gamma-rays originally reported by the MILAGRO collaboration as the brightest TeV source in the Cygnus region. Despite th…
The effects of the stellar wind and orbital motion on the jets of high-mass microquasars
V. Bosch-Ramon, M. V. Barkov
High-mass microquasar jets propagate under the effect of the wind from the companion star, and the orbital motion of the binary system. The stellar wind and the orbit may be domina…
Non-Thermal Emission from Galactic Jets
V. Bosch-Ramon
Jets are ubiquitous in the Universe. They are collimated outflows whose origin is associated to an accretion disc and a central object, and can be very powerful non-thermal emitter…
Observations of microquasars with the MAGIC telescope
J. Rico, M. Rissi, P. Bordas +6
We report on the results from the observations in very high energy band (VHE, E_gamma > 100GeV) of the black hole X-ray binary (BHXB) Cygnus X-1. The observations were performed wi…
The production of orbitally modulated UHE photons in LS 5039
V. Bosch-Ramon, D. Khangulyan
Gamma-ray binaries present emission that is variable and can reach UHE. The processes behind the acceleration of the particles that produce this very energetic radiation are yet to…
Non-thermal emission in hyper-velocity and semi-relativistic stars
J. R. Martinez, S. del Palacio, V. Bosch-Ramon +1
Context. There is a population of runaway stars that move at extremely high speeds with respect to their surroundings. The fast motion and the stellar wind of these stars, plus the…
Binaries with the eyes of CTA
J. M. Paredes, W. Bednarek, P. Bordas +20
The binary systems that have been detected in gamma rays have proven very useful to study high-energy processes, in particular particle acceleration, emission and radiation reproce…
Inverse Compton Emission from Relativistic Jets in Binary Systems
D. Khangulyan, V. Bosch-Ramon, Y. Uchiyama
The gamma-ray emission detected from several microquasars can be produced by relativistic electrons emitting through inverse Compton scattering. In particular, the GeV emission det…
AGN jets versus accretion as reionization sources
N. Torres-AlbÃ, V. Bosch-Ramon, K. Iwasawa
Cosmic reionization put an end to the dark ages that came after the recombination era. Observations seem to favor the scenario where massive stars generating photons in low-mass ga…
Synchrotron emission from secondary leptons in microquasar jets
P. Bordas, J. M. Paredes, V. Bosch-Ramon +1
We present a model to estimate the synchrotron radio emission generated in microquasar (MQ) jets due to secondary pairs created via decay of charged pions produced in proton-proton…
Gamma rays from jets interacting with BLR clouds in blazars
S. del Palacio, V. Bosch-Ramon, G. E. Romero
The innermost parts of powerful jets in active galactic nuclei are surrounded by dense, high-velocity clouds from the broad-line region, which may penetrate into the jet and lead t…
The non-thermal emission from the colliding-wind binary Apep
S. del Palacio, P. Benaglia, M. De Becker +2
The recently discovered massive binary system Apep is the most powerful synchrotron emitter among the known Galactic colliding-wind binaries. This makes this particular system of g…
On the X-ray/TeV connection in Galactic jet sources
V. Bosch-Ramon, D. Khangulyan, F. A. Aharonian
There are three Galactic jet sources, from which TeV emission has been detected: LS 5039, LS I +61 303 and Cygnus X-1. These three sources show power-law tails at X-rays and soft g…
Non-thermal emission from standing relativistic shocks: an application to red giant winds interacting with AGN jets
V. Bosch-Ramon
Galactic and extragalactic relativistic jets have rich environments that are full of moving objects, such as stars and dense clumps. These objects can enter into the jets and gener…
Gamma rays from microquasars Cygnus X-1 and Cygnus X-3
A. Fernández-Barral, O. Blanch, E. de Oña Wilhelmi +8
Gamma-ray observations of microquasars at high and very-high energies can provide valuable information of the acceleration processes inside the jets, the jet-environment interactio…
The role of AGN jets in the reionization epoch
V. Bosch-Ramon
The reionization of the Universe ends the dark ages that started after the recombination era. In the case of H, reionization finishes around . Faint star-forming galaxies…
Studying the interaction between microquasar jets and their environments
M. Perucho, V. Bosch-Ramon
In high-mass microquasars (HMMQ), strong interactions between jets and stellar winds at binary system scales could occur. In order to explore this possibility, we have performed nu…
A search for Very High Energy gamma-ray emission from Scorpius X-1 with the MAGIC telescopes
MAGIC Collaboration, J. AleksiÄ, E. A. Alvarez +150
The acceleration of particles up to GeV or higher energies in microquasars has been the subject of considerable theoretical and observational efforts in the past few years. Sco X-1…
Microquasar interaction with the surrounding medium
P. Bordas, V. Bosch-Ramon, J. M. Paredes +1
The high kinetic energy outflowing in the jets of microquasars is delivered to the surrounding interstellar medium. This energy input can cause the formation of bow shocks and coco…