TEV GAMMA-RAY OBSERVATIONS OF THE GALACTIC CENTER RIDGE BY VERITAS

被引:29
作者
Archer, A. [1 ]
Benbow, W. [2 ]
Bird, R. [3 ]
Buchovecky, M. [4 ]
Buckley, J. H. [1 ]
Bugaev, V. [1 ]
Byrum, K. [5 ]
Cardenzana, J. V. [6 ]
Cerruti, M. [2 ]
Chen, X. [7 ,8 ]
Ciupik, L. [9 ]
Collins-Hughes, E. [3 ]
Connolly, M. P. [10 ]
Eisch, J. D. [6 ]
Falcone, A. [11 ]
Feng, Q. [12 ]
Finley, J. P. [12 ]
Fleischhack, H. [8 ]
Flinders, A. [13 ]
Fortson, L. [14 ]
Furniss, A. [15 ]
Gillanders, G. H. [10 ]
Griffin, S. [16 ]
Grube, J. [9 ]
Gyuk, G. [9 ]
Hakansson, N. [7 ]
Hanna, D. [16 ]
Holder, J. [17 ,18 ]
Humensky, T. B. [19 ]
Huetten, M. [8 ]
Johnson, C. A. [20 ,21 ]
Kaaret, P. [22 ]
Kar, P. [13 ]
Kelley-Hoskins, N. [8 ]
Kertzman, M. [23 ]
Kieda, D. [13 ]
Krause, M. [8 ]
Krennrich, F. [6 ]
Kumar, S. [17 ,18 ]
Lang, M. J. [10 ]
McArthur, S. [12 ]
McCann, A. [16 ]
Meagher, K. [24 ,25 ]
Millis, J. [26 ]
Moriarty, P. [10 ]
Mukherjee, R. [27 ]
Nieto, D. [19 ]
Ong, R. A. [4 ]
Park, N. [28 ]
Pelassa, V. [2 ]
机构
[1] Washington Univ, Dept Phys, St Louis, MO 63130 USA
[2] Harvard Smithsonian Ctr Astrophys, Fred Lawrence Whipple Observ, Amado, AZ 85645 USA
[3] Univ Coll Dublin, Sch Phys, Dublin 4, Ireland
[4] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
[5] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA
[6] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
[7] Univ Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany
[8] DESY, Platanenallee 6, D-15738 Zeuthen, Germany
[9] Adler Planetarium & Astron Museum, Dept Astron, Chicago, IL 60605 USA
[10] Natl Univ Ireland Galway, Sch Phys, Univ Rd, Galway, Ireland
[11] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA
[12] Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA
[13] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA
[14] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA
[15] Calif State Univ East Bay, Dept Phys, Hayward, CA 94542 USA
[16] McGill Univ, Dept Phys, 3600 Univ St, Montreal, PQ H3A 2T8, Canada
[17] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
[18] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA
[19] Columbia Univ, Dept Phys, New York, NY 10027 USA
[20] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA
[21] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA
[22] Univ Iowa, Dept Phys & Astron, Van Allen Hall, Iowa City, IA 52242 USA
[23] Depauw Univ, Dept Phys & Astron, Greencastle, IN 46135 USA
[24] Georgia Inst Technol, Sch Phys, 837 State St NW, Atlanta, GA 30332 USA
[25] Georgia Inst Technol, Ctr Relativist Astrophys, 837 State St NW, Atlanta, GA 30332 USA
[26] Anderson Univ, Dept Phys, 1100 East 5th St, Anderson, IN 46012 USA
[27] Columbia Univ, Barnard Coll, Dept Phys & Astron, New York, NY 10027 USA
[28] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[29] Cork Inst Technol, Dept Appl Sci, Cork, Ireland
[30] Univ Maryland, College Pk, MD 20742 USA
[31] NASA, Goddard Space Flight Ctr, College Pk, MD 20742 USA
[32] Northwestern Univ, Dept Phys & Astron, CIERA, Evanston, IL 60208 USA
基金
美国国家科学基金会; 加拿大自然科学与工程研究理事会;
关键词
Galaxy: center; gamma rays: general; supernovae: individual (G0.9+0.1); HIGH-ENERGY; CENTER REGION; MOLECULAR CLOUDS; CHANDRA OBSERVATIONS; STELLAR ORBITS; BLACK-HOLE; EMISSION; SAGITTARIUS; DISCOVERY; DIRECTION;
D O I
10.3847/0004-637X/821/2/129
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The Galactic Center ridge has been observed extensively in the past by both GeV and TeV gamma-ray instruments revealing a wealth of structure, including a diffuse component and the point sources G0.9+0.1 (a composite supernova remnant) and Sgr A* (believed to be associated with the supermassive black hole located at the center of our Galaxy). Previous very high energy (VHE) gamma-ray observations with the H.E.S.S.. experiment have also detected an extended TeV gamma-ray component along the Galactic plane in the >300 GeV gamma-ray regime. Here we report on observations of the Galactic Center ridge from 2010 to 2014 by the VERITAS telescope array in the >2 TeV energy range. From these observations we (1) provide improved measurements of the differential energy spectrum for Sgr A* in the >2 TeV gamma-ray regime, (2) provide a detection in the >2 TeV gamma-ray emission from the composite SNR G0.9+0.1 and an improved determination of its multi-TeV gamma-ray energy spectrum, and. (3) report on the detection of VER J1746-289, a localized enhancement of >2 TeV gamma-ray emission along the Galactic plane.
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