1.2k citations · 3.1k across the 50 of their papers we have counts for
51 papers
Comment on "Fermi-LAT Galactic Center Excess Morphology of Dark Matter in Simulations of the Milky Way Galaxy"
Kevork N. Abazajian, Jason Kumar, Oscar Macias
Muru et al. [Phys. Rev. Lett. 135, 161005 (2025)] conclude from the HESTIA constrained simulations that the -ray morphologies of the Galactic Center Excess predicted by dark mat…
Constraints on Annihilating Dark Matter from Gamma-Ray Background-Galaxy Shape Correlations: Model-independent Null Results and Moderate Template-based Signals
Masato Shirasaki, Deheng Song, Oscar Macias +2
We revisit the cross-correlation between the unresolved -ray background and galaxy shapes to constrain the annihilation cross section of particle dark matter. Our analysis uses…
Geminga and Monogem in the CTAO Era: Probing TeV Halos and Cosmic-Ray Transport
Youyou Li, Oscar Macias, Manuela Vecchi +1
TeV halos around Geminga and Monogem (B0656+14) reveal regions of strongly suppressed diffusion near middle-aged pulsars. Determining the sizes and magnetic-field strengths of thes…
Dark Matter Line Searches with the Cherenkov Telescope Array
S. Abe, J. Abhir, A. Abhishek +562
Monochromatic gamma-ray signals constitute a potential smoking gun signature for annihilating or decaying dark matter particles that could relatively easily be distinguished from a…
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…
Chasing Gravitational Waves with the Cherenkov Telescope Array
Jarred Gershon Green, Alessandro Carosi, Lara Nava +563
The detection of gravitational waves from a binary neutron star merger by Advanced LIGO and Advanced Virgo (GW170817), along with the discovery of the electromagnetic counterparts…
Variability studies of active galactic nuclei from the long-term monitoring program with the Cherenkov Telescope Array
Guillaume Grolleron, Josefa Becerra González, Jonathan Biteau +13
Blazars are active galactic nuclei (AGN) with a relativistic jet oriented toward the observer. This jet is composed of accelerated particles which can display emission over the ent…
TeV gamma-ray sensitivity to velocity-dependent dark matter models in the Galactic Center
Alessandro Montanari, Oscar Macias, Emmanuel Moulin
The center of the Milky Way is a prime site to search for signals of dark matter (DM) annihilation due to its proximity and expected high concentration of DM. The amplification of…
Dark matter searches in dwarf spheroidal galaxies with the Cherenkov Telescope Array
Francesco Gabriele Saturni, Michele Doro, Aldo Morselli +1
Dark matter (DM) is one of the major components in the Universe. However, at present its existence is still only inferred through indirect astronomical observations. DM particles c…
The Giant Radio Array for Neutrino Detection (GRAND) Collaboration -- Contributions to the 38th International Cosmic Ray Conference (ICRC 2023)
GRAND Collaboration, Rafael Alves Batista, Aurélien Benoit-Lévy +96
The Giant Radio Array for Neutrino Detection (GRAND) is an envisioned observatory of ultra-high-energy particles of cosmic origin, with energies in excess of 100 PeV. GRAND uses la…
Prospective Dark Matter Annihilation Signals From the Sagittarius Dwarf Spheroidal
Thomas A. A. Venville, Alan R. Duffy, Roland M. Crocker +2
The Sagittarius Dwarf Spheroidal galaxy (Sgr) is investigated as a target for DM annihilation searches utilising J-factor distributions calculated directly from a high-resolution h…
Gamma-ray emission from the Sagittarius Dwarf Spheroidal galaxy due to millisecond pulsars
Roland M. Crocker, Oscar Macias, Dougal Mackey +13
The Fermi Bubbles are giant, gamma-ray emitting lobes emanating from the nucleus of the Milky Way discovered in ~1-100 GeV data collected by the Large Area Telescope on board the F…
The Andromeda Gamma-Ray Excess: Background Systematics of the Millisecond Pulsars and Dark Matter Interpretations
Fabian Zimmer, Oscar Macias, Shin'ichiro Ando +2
Since the discovery of an excess in gamma rays in the direction of M31, its cause has been unclear. Published interpretations focus on a dark matter or stellar related origin. Stud…
Assessing the Impact of Hydrogen Absorption on the Characteristics of the Galactic Center Excess
Martin Pohl, Oscar Macias, Phaedra Coleman +1
We present a new reconstruction of the distribution of atomic hydrogen in the inner Galaxy that is based on explicit radiation-transport modelling of line and continuum emission an…
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…
Snowmass2021 Cosmic Frontier: Synergies between dark matter searches and multiwavelength/multimessenger astrophysics
Shin'ichiro Ando, Sebastian Baum, Michael Boylan-Kolchin +23
This whitepaper focuses on the astrophysical systematics which are encountered in dark matter searches. Oftentimes in indirect and also in direct dark matter searches, astrophysica…
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 tha…
Dark matter constraints with stacked gamma rays scales with the number of galaxies
Daiki Hashimoto, Atsushi J. Nishizawa, Masahiro Takada +1
Low-surface-brightness galaxies (LSBGs) are interesting targets for searches of dark matter emission due to their low baryonic content. However, predicting their expected dark matt…
Millisecond Pulsars from Accretion Induced Collapse as the Origin of the Galactic Centre Gamma-ray Excess Signal
Anuj Gautam, Roland M. Crocker, Lilia Ferrario +4
Gamma-ray data from the Fermi-Large Area Telescope reveal an unexplained, apparently diffuse, signal from the Galactic bulge that peaks near 2 GeV with an approximately spherical i…
Cherenkov Telescope Array sensitivity to the putative millisecond pulsar population responsible for the Galactic center excess
Oscar Macias, Harm van Leijen, Deheng Song +3
The leading explanation of the Galactic center -ray excess is the extended emission from a unresolved population of millisecond pulsars (MSPs) in the Galactic b…
Evidence for a high-energy tail in the gamma-ray spectra of globular clusters
Deheng Song, Oscar Macias, Shunsaku Horiuchi +2
Millisecond pulsars are very likely the main source of gamma-ray emission from globular clusters. However, the relative contributions of two separate emission processes--curvature…
Comparing the Galactic Bulge and Galactic Disk Millisecond Pulsars
Harrison Ploeg, Chris Gordon, Roland Crocker +1
The Galactic Center Excess (GCE) is an extended gamma-ray source in the central region of the Galaxy found in Fermi Large Area Telescope (Fermi-LAT) data. One of the leading explan…
Prospects for Heavy WIMP Dark Matter with CTA: the Wino and Higgsino
Lucia Rinchiuso, Oscar Macias, Emmanuel Moulin +2
TeV-scale particles that couple to the standard model through the weak force represent a compelling class of dark matter candidates. The search for such Weakly Interacting Massive…
Green Bank and Effelsberg Radio Telescope Searches for Axion Dark Matter Conversion in Neutron Star Magnetospheres
Joshua W. Foster, Yonatan Kahn, Oscar Macias +6
Axion dark matter (DM) may convert to radio-frequency electromagnetic radiation in the strong magnetic fields around neutron stars. The radio signature of such a process would be a…