2004A&A...413..817I


Query : 2004A&A...413..817I

2004A&A...413..817I - Astronomy and Astrophysics, volume 413, 817-825 (2004/1-3)

Gamma-ray line emission from galaxy clusters.

IYUDIN A.F., BOEHRINGER H., DOGIEL V. and MORFILL G.

Abstract (from CDS):

We report first results of a study dedicated to a search for γ-ray line emission from rich galaxy clusters, finding traces of emission from the region of Virgo and Coma near the Northern Galactic Pole (NGP). The study is based on the 6 years of COMPTEL data collected during the extended observational programme of the Compton Gamma Ray Observatory (CGRO) monitoring of the Virgo and 3C273 region. We point out the advantages of performing this study using an energy range that contains the strongest excitation γ-ray lines of 16O at 6.13, 6.9 and 7.1MeV, as well as lines at 6.175MeV (15O*) and 6.322MeV (15N*) of the spallation products of the cosmic ray interactions with 16O. We discuss a generation mechanism for γ-ray line emission in merging clusters via excitation of the abundant element(s) of the intracluster matter at the merger shock by the subrelativistic protons accelerated to energies of ∼10MeV to ∼100MeV/n in the merger process.

Abstract Copyright:

Journal keyword(s): galaxy clusters: general - galaxies: clusters: individual: Virgo - gamma-rays: observation

CDS comments: Subclusters A,B are BTS87 Cluster A, B. [M98j] 174 is Mahtessian 174 in Simbad.

Simbad objects: 24

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Number of rows : 24
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 PG 0953+414 Sy1 09 56 52.3931554992 +41 15 22.211247636 14.710 15.611 15.546 15.294 14.720 ~ 433 0
2 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2512 1
3 ACO 1465 ClG 12 04 57 +32 07.3           ~ 4 0
4 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6249 0
5 RSCG 57 CGG 12 28 26.4 +09 39 22           ~ 2 0
6 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5558 1
7 Mahtessian 174 GrG 12 29.4 +10 10           ~ 4 0
8 RSCG 60 CGG 12 29 30.5 +08 51 50           ~ 2 0
9 NAME Vir B GrG 12 29.8 +08 00           ~ 125 0
10 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 2022 2
11 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6647 3
12 NAME Virgo A Cluster ClG 12 30.8 +12 23           ~ 128 0
13 3C 279 Bla 12 56 11.1663795384 -05 47 21.528432492   18.01 17.75 15.87   ~ 2863 2
14 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4502 2
15 NGC 4911 LIN 13 00 56.0616749160 +27 47 27.152821212 14.58 13.7 13.33 12.601 12.068 ~ 197 0
16 NGC 4921 LIN 13 01 26.1222244152 +27 53 09.629006748   13.7       ~ 188 0
17 ACO 1665 ClG 13 03 12 +26 40.9           ~ 8 0
18 [RPG97] 232 GrG 13 08 43.50 +24 41 33.1           ~ 3 0
19 NAME Loop IV SNR 13 24 -13.6           ~ 56 1
20 NAME Loop I SR? 15 01 -38.7           ~ 349 2
21 ClG 1821+64 ClG 18 21 56.7276 +64 20 55.841           ~ 495 1
22 7C 1821+6419 Sy1 18 21 57.2130271440 +64 20 36.221312076   14.23 14.24     ~ 566 1
23 QSO B2155-304 BLL 21 58 52.0652249880 -30 13 32.118447792   13.36 13.09 12.62   ~ 1639 1
24 NAME Local Bubble ISM ~ ~           ~ 781 0

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2022.05.24-12:11:37

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