2015A&A...580A..90Y


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.13CEST14:36:54

2015A&A...580A..90Y - Astronomy and Astrophysics, volume 580A, 90-90 (2015/8-1)

Fermi-LAT observations of the Sagittarius B complex.

YANG R., JONES D.I. and AHARONIAN F.

Abstract (from CDS):

We use 5 years of Fermi-LAT data towards the Galactic-centre giant molecular cloud complex, Sagittarius B, to test questions of how well-mixed the Galactic component of cosmic rays are and what the level of the cosmic-ray sea in different parts of the Galaxy is. We use dust-opacity maps from the Planck satellite to obtain independent methods for background subtraction and an estimate for the mass of the region. We then present high-quality spectra of γ-ray emission from 0.3 to 30GeV and obtain an estimate of the cosmic-ray spectrum from the region. We obtain an estimate of the mass of the region of 1.5±0.2x107M using the Planck data, which agrees well with molecular-line-derived estimates for the same region. We find that the γ-ray flux from this region is fitted well with a cosmic-ray spectrum that is the same as is observed locally, with evidence of a small over-density at intermediate (1-10GeV) energies. We conclude that the γ-ray and cosmic-ray spectrum in the region can be well-fitted using a local cosmic-ray spectrum.

Abstract Copyright:

Journal keyword(s): Galaxy: center - gamma rays: ISM - cosmic rays - ISM: clouds - HII regions - ISM: individual objects: Sgr B

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1217 0
2 NAME Sgr C MoC 17 44 36.3 -29 28 13           ~ 321 0
3 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12098 0
4 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3625 3
5 NAME Sgr B1 MoC 17 47 02.0 -28 31 57           ~ 132 0
6 NAME Sgr B MoC 17 47 02 -28 25.4           ~ 197 0
7 3FGL J1747.0-2828 gam 17 47 06 -28 28.9           ~ 7 0
8 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1992 1
9 NAME Galactic Ridge ? ~ ~           ~ 444 1
10 NAME Gould Belt PoG ~ ~           ~ 752 1

    Equat.    Gal    SGal    Ecl

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2021.04.13-14:36:54

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