Publication:
FERMI-LAT OBSERVATIONS of HIGH-ENERGY γ-RAY EMISSION TOWARD the GALACTIC CENTER

Issued Date

2016-03-01

Resource Type

Article

ISSN

15384357
0004637X

DOI

10.3847/0004-637X/819/1/44

Other identifier(s)

2-s2.0-84960950940

Rights

Mahidol University

Rights Holder(s)

SCOPUS

Bibliographic Citation

Astrophysical Journal. Vol.819, No.1 (2016)

Suggested Citation

M. Ajello, A. Albert, W. B. Atwood, G. Barbiellini, D. Bastieri, K. Bechtol, R. Bellazzini, E. Bissaldi, R. D. Blandford, E. D. Bloom, R. Bonino, E. Bottacini, T. J. Brandt, J. Bregeon, P. Bruel, R. Buehler, S. Buson, G. A. Caliandro, R. A. Cameron, R. Caputo, M. Caragiulo, P. A. Caraveo, C. Cecchi, A. Chekhtman, J. Chiang, G. Chiaro, S. Ciprini, J. Cohen-Tanugi, L. R. Cominsky, J. Conrad, S. Cutini, F. D'Ammando, A. De Angelis, F. De Palma, R. Desiante, L. Di Venere, P. S. Drell, C. Favuzzi, E. C. Ferrara, P. Fusco, F. Gargano, D. Gasparrini, N. Giglietto, P. Giommi, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, G. A. Gomez-Vargas, I. A. Grenier, S. Guiriec, M. Gustafsson, A. K. Harding, J. W. Hewitt, A. B. Hill, D. Horan, T. Jogler, G. Jóhannesson, A. S. Johnson, T. Kamae, C. Karwin, J. Knödlseder, M. Kuss, S. Larsson, L. Latronico, J. Li, L. Li, F. Longo, F. Loparco, M. N. Lovellette, P. Lubrano FERMI-LAT OBSERVATIONS of HIGH-ENERGY γ-RAY EMISSION TOWARD the GALACTIC CENTER. Astrophysical Journal. Vol.819, No.1 (2016). doi:10.3847/0004-637X/819/1/44 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/43600

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Title

FERMI-LAT OBSERVATIONS of HIGH-ENERGY γ-RAY EMISSION TOWARD the GALACTIC CENTER

Author(s)

M. Ajello
 A. Albert
 W. B. Atwood
 G. Barbiellini
 D. Bastieri
 K. Bechtol
 R. Bellazzini
 E. Bissaldi
 R. D. Blandford
 E. D. Bloom
 R. Bonino
 E. Bottacini
 T. J. Brandt
 J. Bregeon
 P. Bruel
 R. Buehler
 S. Buson
 G. A. Caliandro
 R. A. Cameron
 R. Caputo
 M. Caragiulo
 P. A. Caraveo
 C. Cecchi
 A. Chekhtman
 J. Chiang
 G. Chiaro
 S. Ciprini
 J. Cohen-Tanugi
 L. R. Cominsky
 J. Conrad
 S. Cutini
 F. D'Ammando
 A. De Angelis
 F. De Palma
 R. Desiante
 L. Di Venere
 P. S. Drell
 C. Favuzzi
 E. C. Ferrara
 P. Fusco
 F. Gargano
 D. Gasparrini
 N. Giglietto
 P. Giommi
 F. Giordano
 M. Giroletti
 T. Glanzman
 G. Godfrey
 G. A. Gomez-Vargas
 I. A. Grenier
 S. Guiriec
 M. Gustafsson
 A. K. Harding
 J. W. Hewitt
 A. B. Hill
 D. Horan
 T. Jogler
 G. Jóhannesson
 A. S. Johnson
 T. Kamae
 C. Karwin
 J. Knödlseder
 M. Kuss
 S. Larsson
 L. Latronico
 J. Li
 L. Li
 F. Longo
 F. Loparco
 M. N. Lovellette
 P. Lubrano

Other Contributor(s)

Clemson University
 Kavli Institute for Particle Astrophysics and Cosmology
 Santa Cruz Institute for Particle Physics
 Istituto Nazionale di Fisica Nucleare, Roma
 Universita degli Studi di Trieste
 Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
 Università degli Studi di Padova
 University of Wisconsin Madison
 Istituto Nazionale Di Fisica Nucleare, Sezione di Pisa
 Università degli Studi di Torino
 NASA Goddard Space Flight Center
 Laboratoire Univers et Particules de Montpellier
 Laboratoire Leprince-Ringuet
 Deutsche Elektronen-Synchrotron
 Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
 INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
 Universita degli Studi di Perugia
 George Mason University, Fairfax Campus
 Agenzia Spaziale Italiana
 Osservatorio Astronomico di Roma
 Sonoma State University
 Stockholms universitet
 Oskar Klein Centre for Cosmoparticle Physics
 Kungl. Vetenskapsakademien
 Istituto Di Radioastronomia, Bologna
 Alma Mater Studiorum Università di Bologna
 Universita degli Studi di Udine
 Università degli Studi di Napoli Federico II
 Università degli Studi di Bari
 Pontificia Universidad Católica de Chile
 Institut de Recherche sur les Lois Fondamentales de l'Univers
 Universität Göttingen
 University of North Florida
 University of Southampton
 University Science Institute Reykjavik
 University of Tokyo
 University of California, Irvine
 CNRS Centre National de la Recherche Scientifique
 Universite de Toulouse
 The Royal Institute of Technology (KTH)
 Universitat Autònoma de Barcelona
 Naval Research Laboratory
 University of Maryland
 Mahidol University
 Hiroshima University
 University of Denver
 Max Planck Institut fur Physik (Werner-Heisenberg-Institut)
 The University of Hong Kong
 Medizinische Universitat Innsbruck

Abstract

© 2016. The American Astronomical Society. All rights reserved. The Fermi Large Area Telescope (LAT) has provided the most detailed view to date of the emission toward the Galactic center (GC) in high-energy γ-rays. This paper describes the analysis of data taken during the first 62 months of the mission in the energy range 1-100 GeV from a 15° × 15° region about the direction of the GC. Specialized interstellar emission models (IEMs) are constructed to enable the separation of the γ-ray emissions produced by cosmic ray particles interacting with the interstellar gas and radiation fields in the Milky Way into that from the inner ∼1 kpc surrounding the GC, and that from the rest of the Galaxy. A catalog of point sources for the 15° × 15° region is self-consistently constructed using these IEMs: the First Fermi-LAT Inner Galaxy Point Source Catalog (1FIG). The spatial locations, fluxes, and spectral properties of the 1FIG sources are presented, and compared with γ-ray point sources over the same region taken from existing catalogs. After subtracting the interstellar emission and point-source contributions a residual is found. If templates that peak toward the GC are used to model the positive residual the agreement with the data improves, but none of the additional templates tried account for all of its spatial structure. The spectrum of the positive residual modeled with these templates has a strong dependence on the choice of IEM.

Keyword(s)

Earth and Planetary Sciences

Availability

URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/43600

Collections

Scopus 2016-2017