Articles with "fermi lat" as a keyword



The Fermi-LAT GeV excess as a tracer of stellar mass in the Galactic bulge

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Published in 2018 at "Nature Astronomy"

DOI: 10.1038/s41550-018-0531-z

Abstract: An anomalous emission component at energies of a few gigaelectronvolts and located towards the inner Galaxy is present in the Fermi-LAT data. At present, the two most promising explanations are the annihilation of dark matter… read more here.

Keywords: bulge; stellar mass; dark matter; fermi lat ... See more keywords

A complete sample of LSP blazars fully described in γ-rays: New γ-ray detections and associations with Fermi-LAT

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Published in 2018 at "Astronomy and Astrophysics"

DOI: 10.1051/0004-6361/201832786

Abstract: We study the $\gamma$-ray and broadband spectral energy distribution (SED) properties of a complete sample of 104 bright, radio-selected low-synchrotron peaked (LSP) blazars. Most of the sources have already been detected in the $\gamma$-ray band… read more here.

Keywords: gamma ray; detections associations; fermi lat; complete sample ... See more keywords

Detection of virial shocks in stacked Fermi-LAT galaxy clusters

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Published in 2018 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2018/10/010

Abstract: In the hierarchical paradigm of structure formation, galaxy clusters are the largest objects ever to virialize. They are thought to grow by accreting mass through large scale, strong virial shocks. Such a collisionless shock is… read more here.

Keywords: gamma ray; detection virial; fermi lat; virial shocks ... See more keywords

Search for semi-annihilating dark matter with Fermi-LAT, H.E.S.S., Planck, and the Cherenkov Telescope Array

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Published in 2019 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2019/04/048

Abstract: Dark matter annihilations have been fiercely restricted by the non-observation of excess events in indirect detection probes. Typically the interactions that dictate annihilation are also present in the dark matter-nucleon scattering cross section, also severely… read more here.

Keywords: telescope array; cherenkov telescope; matter; dark matter ... See more keywords

Analysis of Fermi-LAT observations, UHECRs and neutrinos from the radio galaxy Centaurus B

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Published in 2019 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2019/08/023

Abstract: Centaurus B (Cen B) is one of the closest and brightest radio-loud galaxy in the southern sky. This radio galaxy, proposed as a plausible candidate for accelerating ultra-high-energy cosmic rays (UHECRs), is near the highest-energy… read more here.

Keywords: energy; radio; analysis; fermi lat ... See more keywords

Analysis of Fermi-LAT data from Tucana-II: possible constraints on the Dark Matter models with an intriguing hint of a signal

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Published in 2019 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2019/08/028

Abstract: Tucana-II (Tuc-II), a recently discovered and confirmed Ultra Faint Dwarf Spheroidal galaxy, has a high mass to light ratio as well as a large line-of-sight stellar velocity dispersion, thus making it an ideal candidate for… read more here.

Keywords: matter; dark matter; fermi lat; analysis fermi ... See more keywords

Fermi/LAT observations of lobe-dominant radio galaxy 3C 207 and possible radiation region of γ-rays

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Published in 2018 at "Research in Astronomy and Astrophysics"

DOI: 10.1088/1674-4527/18/6/70

Abstract: 3C 207 is a lobe-dominant radio galaxy with one sided jet and the bright knots in kpc-Mpc scale were resolved in the radio, optical and X-ray bands. It was confirmed as a gamma-ray emitter with… read more here.

Keywords: gamma ray; radio; lobe dominant; fermi lat ... See more keywords

Synchrotron self-Compton in a radiative-adiabatic fireball scenario: Modelling the multiwavelength observations in some Fermi/LAT bursts

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Published in 2024 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stae2190

Abstract: Energetic GeV photons expected from the closest and the most energetic Gamma-ray bursts (GRBs) provide an unique opportunity to study the very-high-energy emission as well as the possible correlations with lower energy bands in realistic… read more here.

Keywords: fermi lat; radiative adiabatic; scenario; self compton ... See more keywords

Extensive Analysis of γ-Ray Periodicity in Jetted AGN from the 4FGL Catalog Using Fermi-LAT Observations

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Published in 2025 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/staf1598

Abstract: The quest to uncover periodic patterns within the γ-ray emissions of jetted active galactic nuclei (AGN) has recently emerged as a focal point in astrophysics. One of the primary challenges has been the necessity for… read more here.

Keywords: extensive analysis; fermi lat; jetted agn; periodicity ... See more keywords

Fermi/LAT detection of a transient gamma-ray flare in the vicinity of the binary star DG CVn

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Published in 2017 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stx396

Abstract: Solar flares are regularly detected by the Large Area Telescope (LAT) on board the Fermi satellite, however no γ-ray emission from other stellar eruptions has ever been captured. The Swift detection in 2014 April of… read more here.

Keywords: ray flare; fermi lat; cvn; binary star ... See more keywords

Simultaneous long-term monitoring of LS I +61°303 by OVRO and Fermi-LAT

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Published in 2018 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/sty1037

Abstract: Previous long-term monitorings of the gamma-ray-loud X-ray binary LS I +61{\deg}303 have revealed the presence of a long-term modulation of ~4.5 years. After nine years of simultaneous monitoring of LS I +61{\deg}303 by the Owens… read more here.

Keywords: gamma ray; term; long term; radio ... See more keywords