Publications (87)
The Galactic bulge millisecond pulsars shining in X rays: A gamma-ray perspective
Joanna Berteaud, Francesca Calore, Maica Clavel +3
If the mysterious Fermi-LAT GeV gamma-ray excess is due to an unresolved population of millisecond pulsars (MSP) in the Galactic bulge, one expects this very same population to shi…
Stellar flares cannot explain the Galactic 511 keV emission
Saurabh Mittal, Thomas Siegert, Francesca Calore +12
The authors assess whether stellar flares can produce enough positrons to explain the Milky Way’s 511 keV annihilation line and conclude that flares fall short by several orders of…
Effective Field Theory of Dark Matter: a Global Analysis
Sebastian Liem, Gianfranco Bertone, Francesca Calore +4
We present global fits of an effective field theory description of real, and complex scalar dark matter candidates. We simultaneously take into account all possible dimension 6 ope…
An Image-Based Search for Pulsar Candidates in the MeerKAT Bulge Survey
Dale A. Frail, Emil Polisensky, Scott D. Hyman +13
We report on the results of an image-based search for pulsar candidates toward the Galactic bulge. We used mosaic images from the MeerKAT radio telescope, that were taken as part o…
Reconstructing the star formation rate for compact binary populations with the Einstein telescope
Neha Singh, Tomasz Bulik, Krzysztof Belczynski +2
The Einstein Telescope (ET) is a proposed third-generation, wide-band gravitational wave (GW) detector. Given its improved detection sensitivity in comparison to the second-generat…
Modulations in Spectra of Galactic Gamma-ray sources as a result of photon-ALPs mixing
Jhilik Majumdar, Francesca Calore, Dieter Horns
Axion like particles (ALPs) are fundamental pseudo scalar particles with properties similar to Axions which are a well-known extension of the standard model to solve the strong CP…
Simulated Milky Way analogues: implications for dark matter direct searches
Nassim Bozorgnia, Francesca Calore, Matthieu Schaller +7
We study the implications of galaxy formation on dark matter direct detection using high resolution hydrodynamic simulations of Milky Way-like galaxies simulated within the EAGLE a…
Quiescent black hole X-ray binaries as multi-messenger sources
Dimitrios Kantzas, Francesca Calore
The origin of Galactic cosmic rays (CRs) is unknown even though they have traditionally been connected to supernovae based on energetic arguments. In the past decades, Galactic bla…
Supernova bounds on axion-like particles coupled with nucleons and electrons
Francesca Calore, Pierluca Carenza, Maurizio Giannotti +3
We investigate the potential of type II supernovae (SNe) to constrain axion-like particles (ALPs) coupled simultaneously to nucleons and electrons. ALPs coupled to nucleons can be…
Lecture Notes: WISPs in gamma-ray astrophysics
Francesca Calore, Christopher Eckner
These lecture notes provide an overview of high-energy astrophysical processes involving axions, axion-like particles (ALPs), and other weakly interacting slim particles (WISPs) fo…
Gamma-ray sensitivity to dark matter subhalo modelling at high latitudes
Francesca Calore, Moritz Hütten, Martin Stref
Searches for "dark" subhaloes in gamma-ray point-like source catalogues are among promising strategies for indirect dark matter detection. Such a search is nevertheless affected by…
The Fermi-LAT GeV Excess Traces Stellar Mass in the Galactic Bulge
Richard Bartels, Emma Storm, Christoph Weniger +1
An anomalous emission component at energies of a few GeV and located towards the inner Galaxy is present in the Fermi-LAT data. It is known as the Fermi-LAT GeV excess. Using almos…
Uncovering axion-like particles in supernova gamma-ray spectra
Francesca Calore, Pierluca Carenza, Christopher Eckner +4
A future Galactic Supernova (SN) explosion can lead to a gamma-ray signal induced by ultralight Axion-Like Particles (ALPs) thermally produced in the SN core and converted into hig…
-Ray Lines -- Signatures of Nucleosynthesis, Cosmic Rays, Positron Annihilation, and Fundamental Physics
Thomas Siegert, Francesca Calore, Pierre Jean +6
The nuclear -ray lines in the MeV range of the electromagnetic spectrum hold a vast variety of astrophysical, particle-physical, and fundamental physical information that is ot…
Snowmass2021 Cosmic Frontier White Paper: Puzzling Excesses in Dark Matter Searches and How to Resolve Them
Rebecca K. Leane, Seodong Shin, Liang Yang +36
Intriguing signals with excesses over expected backgrounds have been observed in many astrophysical and terrestrial settings, which could potentially have a dark matter origin. Ast…
The GeV Excess Shining Through: Background Systematics for the Inner Galaxy Analysis
Francesca Calore, Ilias Cholis, Christoph Weniger
Recently, a spatially extended excess of gamma rays collected by the Fermi-LAT from the inner region of the Milky Way has been detected by different groups and with increasingly so…
Dissecting the inner Galaxy with -ray pixel count statistics
Francesca Calore, Fiorenza Donato, Silvia Manconi
We combine adaptive template fitting and pixel count statistics in order to assess the nature of the Galactic center excess in Fermi-LAT data. We reconstruct the flux distribution…
Radio detection prospects for a bulge population of millisecond pulsars as suggested by Fermi LAT observations of the inner Galaxy
Francesca Calore, Mattia Di Mauro, Fiorenza Donato +2
Analogously to globular clusters, the dense stellar environment of the Galactic center has been proposed to host a large population of as-yet undetected millisecond pulsars (MSPs).…
Realistic estimation for the detectability of dark matter sub-halos with Fermi-LAT
Francesca Calore, Valentina De Romeri, Mattia Di Mauro +2
Numerical simulations of structure formation have recorded a remarkable progress in the recent years, in particular due to the inclusion of baryonic physics evolving with the dark…
Background model systematics for the Fermi GeV excess
Francesca Calore, Ilias Cholis, Christoph Weniger
The possible gamma-ray excess in the inner Galaxy and the Galactic center (GC) suggested by Fermi-LAT observations has triggered a large number of studies. It has been interpreted…
New constraints on the central mass contents of Omega Centauri from combined stellar kinematics and pulsar timing
Andrés Bañares-Hernández, Francesca Calore, Jorge Martin Camalich +1
We perform a combined analysis of stellar kinematics and line-of-sight accelerations of millisecond pulsars to investigate the mass contents of Omega Centauri. We consider multiple…
Investigating the gamma-ray burst from decaying MeV-scale axion-like particles produced in supernova explosions
Eike Müller, Francesca Calore, Pierluca Carenza +2
We investigate the characteristics of the gamma-ray signal following the decay of MeV-scale Axion-Like Particles (ALPs) coupled to photons which are produced in a Supernova (SN) ex…
A robust neural determination of the source-count distribution of the Fermi-LAT sky at high latitudes
Christopher Eckner, Noemi Anau Montel, Florian List +2
Over the past 16 years, the Fermi Large Area Telescope (LAT) has significantly advanced our view of the GeV gamma-ray sky, yet several key questions remain - such as the compositio…
Cosmic-ray cooling by dark matter in astrophysical jets
Dimitrios Kantzas, Francesca Calore, Marco Chianese
Astrophysical jets from powerful active galactic nuclei (AGN) have recently been proposed as promising probes of dark matter (DM) in the sub-GeV mass range. AGN launch relativistic…
Diffuse Galactic emission spectrum between 0.5 and 8.0 MeV
Thomas Siegert, Joanna Berteaud, Francesca Calore +2
The last measurement of the diffuse emission spectrum of the Milky Way in the megaelectronvolt (MeV) photon energy range was performed by CGRO/COMPTEL more than 20 years ago. We re…
Particle Dark Matter Constraints: the Effect of Galactic Uncertainties
Maria Benito, Nicolas Bernal, Nassim Bozorgnia +2
Collider, space, and Earth based experiments are now able to probe several extensions of the Standard Model of particle physics which provide viable dark matter candidates. Direct…
AMS-02 antiprotons and dark matter: Trimmed hints and robust bounds
Francesca Calore, Marco Cirelli, Laurent Derome +4
Based on 4 yr AMS-02 antiproton data, we present bounds on the dark matter (DM) annihilation cross section vs. mass for some representative final state channels. We use recent cosm…
Gamma rays from Galactic pulsars
Francesca Calore, Mattia Di Mauro, Fiorenza Donato
Gamma rays from young pulsars and milli-second pulsars are expected to contribute to the diffuse gamma-ray emission measured by the {\it Fermi} Large Area Telescope (LAT) at high l…
Search for Axion-Like Particles from Nearby Pre-Supernova Stars
Saurabh Mittal, Thomas Siegert, Francesca Calore +7
Axion-like particles (ALPs) are hypothetical pseudoscalar bosons that arise in many extensions of the Standard Model and are well-motivated dark matter candidates. Nearby massive s…
Pulsar Discoveries from the TRAPUM UHF Survey of Fermi-LAT Sources
Tinn Thongmeearkom, Colin J. Clark, Rene P. Breton +25
The Fermi Large Area Telescope (LAT) provides advantages for radio pulsar searches by enabling efficient target selection. We can confidently point radio telescopes to the position…
Significant Enhancement of Neutralino Dark Matter Annihilation from Electroweak Bremsstrahlung
Torsten Bringmann, Francesca Calore
Indirect searches for the cosmological dark matter have become ever more competitive during the past years. Here, we report the first full calculation of leading electroweak correc…
Deepening gamma-ray point-source catalogues with sub-threshold information
Aurelio Amerio, Francesca Calore, Pasquale Dario Serpico +1
We propose a novel statistical method to extend Fermi-LAT catalogues of high-latitude -ray sources below their nominal threshold. To do so, we rely on a recent determination of…
Can local White Dwarfs constrain Dark Matter interactions?
Pooja Bhattacharjee, Sandra Robles, Stephan A. Meighen-Berger +1
We investigate whether nearby white dwarfs (WDs) can constrain dark matter (DM) interactions with ordinary matter. As experimental sensitivity improves, driven by the Gaia mission,…
Detecting dark matter sub-halos in the Galactic plane with the Cherenkov Telescope Array Observatory
Christopher Eckner, Veronika Vodeb, Tejas Satheesh +4
Numerous observations confirm the existence of dark matter (DM) at astrophysical and cosmological scales. Theory and simulations of galaxy formation predict that DM should cluster…
Dark Matter Science in the Era of LSST
Keith Bechtol, Alex Drlica-Wagner, Kevork N. Abazajian +177
Astrophysical observations currently provide the only robust, empirical measurements of dark matter. In the coming decade, astrophysical observations will guide other experimental…
Reconciling hints on axion-like-particles from high-energy gamma rays with stellar bounds
Gautham Adamane Pallathadka, Francesca Calore, Pierluca Carenza +9
It has been recently claimed by two different groups that the spectral modulation observed in gamma rays from Galactic pulsars and supernova remnants can be due to conversion of ph…
Conservative upper limits on WIMP annihilation cross section from Fermi-LAT γ-rays
Francesca Calore, Valentina De Romeri, Fiorenza Donato
The spectrum of an isotropic extragalactic γ-ray background (EGB) has been measured by the Fermi-LAT telescope at high latitudes. Two new models for the EGB are derived from the s…
Dark matter constraints from dwarf galaxies: a data-driven analysis
Francesca Calore, Pasquale D. Serpico, Bryan Zaldivar
Dwarf galaxies represent a powerful probe of annihilating dark matter particle models, with gamma-ray data setting some of the best bounds available. A major issue in improving ove…
The Galactic center excess at the highest energies: morphology and photon-count statistics
Silvia Manconi, Francesca Calore, Fiorenza Donato
The nature of the GeV gamma-ray Galactic center excess (GCE) in the data of Fermi-Large Area Telescope (LAT) is still to be unveiled. We present a new analysis of the inner Galaxy…
Detecting and characterizing pulsar haloes with the Cherenkov Telescope Array
Christopher Eckner, Veronika Vodeb, Pierrick Martin +2
The recently identified source class of pulsar haloes may be numerous and bright enough in the TeV range to constitute a large fraction of the sources that will be observed with th…
Discovery of 15 new pulsars at high Galactic Latitudes with FAST
Xin Xu, Shi Dai, Qijun Zhi +9
We present the discovery and timing results of 15 pulsars discovered in a high Galactic latitude survey conducted with the Five-hundred-meter Aperture Spherical Telescope (FAST). T…
Dark matter annihilation radiation in hydrodynamic simulations of Milky Way haloes
Matthieu Schaller, Carlos S. Frenk, Tom Theuns +8
We obtain predictions for the properties of cold dark matter annihilation radiation using high resolution hydrodynamic zoom-in cosmological simulations of Milky Way-like galaxies (…
Gamma-ray spectral modulations of Galactic pulsars caused by photon-ALPs mixing
Jhilik Majumdar, Francesca Calore, Dieter Horns
Well-motivated extensions of the standard model predict ultra-light and fundamental pseudo-scalar particles (e.g., axions or axion-like particles: ALPs). Similarly to the Primakoff…
Sub-GeV Dark Matter Annihilation: Limits from Milky Way observations with INTEGRAL
Thomas Siegert, Francesca Calore, Pasquale Dario Serpico
From 16 years of INTEGRAL/SPI -ray observations, we derive bounds on annihilating light dark matter particles in the halo of the Milky Way up to masses of about 300 MeV. We tes…
Probing the Dark Matter Capture Rate in a Local Population of Brown Dwarfs with IceCube Gen 2
Pooja Bhattacharjee, Francesca Calore
This study explores the potential for dark matter annihilation within brown dwarfs, investigating an unconventional mechanism for neutrino production. Motivated by the efficient ac…
511 keV line constraints on feebly interacting particles from supernovae
Francesca Calore, Pierluca Carenza, Maurizio Giannotti +4
Feebly interacting particles with masses with O(10-100) MeV can be copiously produced by core-collapse supernovae (SNe). In this paper we consider the case of MeV-ish sterile neutr…
Bounds on axion-like particles from the diffuse supernova flux
Francesca Calore, Pierluca Carenza, Maurizio Giannotti +2
The cumulative emission of Axion-Like Particles (ALPs) from all past core-collapse supernovae (SNe) would lead to a diffuse flux with energies MeV. We use this t…
Low-frequency radio telescopes sensitivity to light dark matter
Ruben Zatini, Francesca Calore, Pasquale Dario Serpico
Ground-based radio telescopes are routinely used to search for light dark matter (DM) candidates such as axion-like particles or dark photons. These instruments face however inhere…
On the Relevance of Sharp Gamma-Ray Features for Indirect Dark Matter Searches
Torsten Bringmann, Francesca Calore, Gilles Vertongen +1
Gamma rays from the annihilation of dark matter particles in the Galactic halo provide a particularly promising means of indirectly detecting dark matter. Here, we demonstrate that…
Indirect searches for dark matter bound state formation and level transitions
Iason Baldes, Francesca Calore, Kalliopi Petraki +2
Indirect searches for dark matter (DM) have conventionally been applied to the products of DM annihilation or decay. If DM couples to light force carriers, however, it can be captu…
Spectral cutoffs in indirect dark matter searches
Christoph Weniger, Torsten Bringmann, Francesca Calore +1
Indirect searches for dark matter annihilation or decay products in the cosmic-ray spectrum are plagued by the question of how to disentangle a dark matter signal from the omnipres…
Reticulum II: Particle Dark Matter and Primordial Black Holes Limits
Thomas Siegert, Celine Boehm, Francesca Calore +4
Reticulum II (Ret II) is a satellite galaxy of the Milky Way and presents a prime target to investigate the nature of dark matter (DM) because of its high mass-to-light ratio. We e…
CMB bounds on disk-accreting massive Primordial Black Holes
Vivian Poulin, Pasquale D. Serpico, Francesca Calore +2
Stellar-mass Primordial Black Holes (PBH) have been recently reconsidered as a Dark Matter (DM) candidate, after the aLIGO discovery of several binary BH mergers with masses of ten…
NAJADS: a self-contained framework for the direct determination of astrophysical J-factors
Anna Balaudo, Francesca Calore, Valentina De Romeri +1
Cosmological simulations play a pivotal role in understanding the properties of the dark matter (DM) distribution in both galactic and galaxy-cluster environments. The characteriza…
SkyFACT: High-dimensional modeling of gamma-ray emission with adaptive templates and penalized likelihoods
Emma Storm, Christoph Weniger, Francesca Calore
We present SkyFACT (Sky Factorization with Adaptive Constrained Templates), a new approach for studying, modeling and decomposing diffuse gamma-ray emission. Like most previous ana…
The COSMIC WISPers White Paper: The physics case for Weakly Interacting Slim Particles
Ariel Arza, Deniz Aybas, Shyam Balaji +124
Axions and other very weakly interacting slim particles (WISPs), with masses below 1 GeV, arise naturally in many extensions of the Standard Model of particle physics. In particula…
Gamma-ray image reconstruction of the Andromeda galaxy
Celine Armand, Francesca Calore
We analyze about 12 years of Fermi-LAT data in the direction of the Andromeda galaxy (M31). We robustly characterize its spectral and morphological properties against systematic un…
Investigating the detection of dark matter subhalos as extended sources with Fermi-LAT
Mattia Di Mauro, Martin Stref, Francesca Calore
Cold dark matter (DM) models for structure formation predict that DM subhalos are present in the Galaxy. In the standard paradigm of DM as weakly interacting massive particle, subh…
Simulation-based inference of radio millisecond pulsars in globular clusters
Joanna Berteaud, Christopher Eckner, Francesca Calore +2
Millisecond pulsars (MSPs) are abundant in globular clusters (GCs), which offer favorable environments for their creation. While the advent of recent, powerful facilities led to a…
Probing the Fermi-LAT GeV excess with gravitational waves
Francesca Calore, Tania Regimbau, Pasquale Dario Serpico
If the gamma-ray excess towards the inner Galaxy (GCE) detected in Fermi-LAT data is due to millisecond pulsars (MSPs), one expects an associated gravitational wave (GW) signal, wh…
A Gaia DR2 search for dwarf galaxies towards Fermi-LAT sources: implications for annihilating dark matter
Ioana CiucÄ, Daisuke Kawata, Shin'ichiro Ando +3
We make a first attempt to find dwarf galaxies in eight \Fermi-LAT extended, unassociated, source fields using \Gaia\ DR2. We probe previously unexplored heliocentric distances of…
A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
Francesca Calore, Ilias Cholis, Christopher McCabe +1
Several groups have identified an extended excess of gamma rays over the modeled foreground and background emissions towards the Galactic center (GC) based on observations with the…
Constraining gravitational-wave backgrounds from conversions into photons in the Galactic magnetic field
Alessandro Lella, Francesca Calore, Pierluca Carenza +1
High-frequency gravitational waves ( MHz) may provide a unique signature for the existence of exotic physics. The lack of current and future gravitational-wave experim…
Measuring the smearing of the Galactic 511 keV signal: positron propagation or supernova kicks?
Thomas Siegert, Roland M. Crocker, Oscar Macias +4
We use 15 years of -ray data from INTEGRAL/SPI in a refined investigation of the morphology of the Galactic bulge positron annihilation signal. Our spatial analysis confirms th…
No evidence for gamma-ray emission from the Sagittarius dwarf spheroidal galaxy
Christopher Eckner, Silvia Manconi, Francesca Calore
More than a decade ago, the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope unveiled the existence of two gigantic gamma-ray lobes known as the Fermi bubbles. While…
3D template-based -LAT constraints on the diffuse supernova axion-like particle background
Francesca Calore, Pierluca Carenza, Christopher Eckner +7
Axion-like particles (ALPs) may be abundantly produced in core-collapse (CC) supernovae (SNe), hence the cumulative signal from all past SN events can create a diffuse flux peaked…
Electroweak and Higgs Boson Internal Bremsstrahlung: General considerations for Majorana dark matter annihilation and application to MSSM neutralinos
Torsten Bringmann, Francesca Calore, Ahmad Galea +1
It is well known that the annihilation of Majorana dark matter into fermions is helicity suppressed. Here, we point out that the underlying mechanism is a subtle combination of two…
Global analysis of the pMSSM in light of the Fermi GeV excess: prospects for the LHC Run-II and astroparticle experiments
Gianfranco Bertone, Francesca Calore, Sascha Caron +4
We present a new global fit of the 19-dimensional phenomenological Minimal Supersymmetric Standard Model (pMSSM-19) that comply with all the latest experimental results from dark m…
Stellar-like Galactic center excess challenges particle dark matter
Silvia Manconi, Christopher Eckner, Francesca Calore +1
The authors re‑analyse Fermi‑LAT gamma‑ray data from the Galactic Center using adaptive template fitting and photon‑count statistics to separate a possible dark‑matter signal from…
The Galactic Center GeV Excess from a Series of Leptonic Cosmic-Ray Outbursts
Ilias Cholis, Carmelo Evoli, Francesca Calore +3
It has been proposed that a recent outburst of cosmic-ray electrons could account for the excess of GeV-scale gamma rays observed from the region surrounding the Galactic Center. A…
Dark matter constraints from dwarf galaxies with data-driven J-factors
Alexandre Alvarez, Francesca Calore, Anna Genina +3
We present an updated analysis of the gamma-ray flux from the directions of classical dwarf spheroidal galaxies, deriving new constraints on WIMP dark matter (DM) annihilation usin…
Constraints on light decaying dark matter candidates from 16 years of INTEGRAL/SPI observations
Francesca Calore, Ariane Dekker, Pasquale Dario Serpico +1
We apply the recently developed analysis of 16 years of INTEGRAL/SPI data including a dark matter spatial template to derive bounds on dark matter candidates lighter than WIMPs (li…
Exploring the Dark Universe: A European Strategy for Axions and other WISPs Discovery
Deniz Aybas, Francesca Calore, Michele Cicoli +17
Axions and other very weakly interacting slim (with 1 GeV) particles (WISPs) are a common feature of several extensions of the Standard Model of Particle Physics. The search…
Robust inference of the Galactic centre gamma-ray excess spatial properties
Deheng Song, Christopher Eckner, Chris Gordon +6
The gamma-ray Fermi-LAT Galactic centre excess (GCE) has puzzled scientists for over 15 years. Despite ongoing debates about its properties, and especially its spatial distribution…
Physics Briefing Book: Input for the 2026 update of the European Strategy for Particle Physics
Jorge de Blas, Monica Dunford, Emanuele Bagnaschi +127
The European Strategy for Particle Physics (ESPP) reflects the vision and presents concrete plans of the European particle physics community for advancing human knowledge in fundam…
Searching for Primordial Black Holes in the radio and X-ray sky
Daniele Gaggero, Gianfranco Bertone, Francesca Calore +4
We model the accretion of gas onto a population of massive primordial black holes in the Milky Way, and compare the predicted radio and X-ray emission with observational data. We s…
How do the dynamics of the Milky Way -- Large Magellanic Cloud system affect gamma-ray constraints on particle dark matter?
Christopher Eckner, Francesca Calore, Denis Erkal +2
Previous studies on astrophysical dark matter (DM) constraints have all assumed that the Milky Way's (MW) DM halo can be modelled in isolation. However, recent work suggests that t…
Spectral modulation of non-Galactic plane Gamma-ray pulsars due to photon-ALPs mixing in Galactic magnetic field
Jhilik Majumdar, Francesca Calore, Dieter Horns
In many approaches to describe physics beyond the standard model, light Nambu-Goldstone bosons (named axion-like particles or ALPS for their similarity with the axion) are predicte…
Determining the Dark Matter distribution in galaxies with Deep Learning
MartÃn Emilio de los Rios, Mihael PetaÄ, Bryan Zaldivar +3
We present a novel method to infer the Dark Matter (DM) content and spatial distribution within galaxies, based on convolutional neural networks trained within state-of-the-art hyd…
Constraining dark matter annihilation with the isotropic -ray background: updated limits and future potential
Torsten Bringmann, Francesca Calore, Mattia Di Mauro +1
The nature of the Isotropic -ray Background (IGRB) measured by the Large Area Telescope (LAT) on the Fermi -ray space Telescope ({\it Fermi}) remains partially unexplained.…
First constraints on axion-like particles from Galactic sub-PeV gamma rays
Christopher Eckner, Francesca Calore
Experimental refinements and technical innovations in the field of extensive air shower telescopes have enabled measurements of Galactic cosmic-ray interactions in the sub-PeV rang…
Galactic Binaries Can Explain the Fermi Galactic Center Excess and 511 keV Emission
Richard Bartels, Francesca Calore, Emma Storm +1
The Fermi-LAT Galactic Center excess and the 511 keV positron-annihilation signal from the inner Galaxy bare a striking morphological similarity. We propose that both can be explai…
Anatomy of astrophysical echoes from axion dark matter
Elisa Todarello, Francesca Calore, Marco Regis
If the dark matter in the Universe is made of eV axion-like particles (ALPs), then a rich phenomenology can emerge in connection to their stimulated decay into two photons. We…
Do the sources of the 511 keV excess explain the anomalous CMZ ionization?
Pedro De la Torre Luque, Francesca Calore
The anomalous rate of molecules ionization observed at the Central Molecular zone (CMZ) challenges known mechanisms of ionization observed in molecular clouds across the Galaxy, du…
Probing protoneutron stars with gamma-ray axionscopes
Alessandro Lella, Francesca Calore, Pierluca Carenza +4
Axion-like particles (ALPs) coupled to nucleons can be efficiently produced in the interior of protoneutron stars (PNS) during supernova (SN) explosions. If these ALPs are also cou…
Gamma-ray flux limits from brown dwarfs: Implications for dark matter annihilating into long-lived mediators
Pooja Bhattacharjee, Francesca Calore, Pasquale Dario Serpico
Brown dwarfs (BDs) are celestial objects representing the link between the least massive main-sequence stars and giant gas planets. In the first part of this article, we perform a…
Investigating the effect of Milky Way dwarf spheroidal galaxies extension on dark matter searches with Fermi-LAT data
Mattia Di Mauro, Martin Stref, Francesca Calore
Satellite galaxies of the Milky Way with high mass-to-light ratios and little baryon content, i.e. dwarf spheroidal galaxies (dSphs), are among the most promising targets to detect…