2013ApJ...769L..17T


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.18CET05:24:13

2013ApJ...769L..17T - Astrophys. J., 769, L17 (2013/May-3)

High-velocity H I is not associated with the TeV supernova remnant W51C.

TIAN W.W. and LEAHY D.A.

Abstract (from CDS):

The recently detected TeV γ-ray source HESS J1923+141 coincides with supernova remnant (SNR) W51C and the star-forming region W51B of the W51 complex. We construct H I absorption spectra of SNR W51C, H II regions G49.2-0.35 and G49.1-0.38 in W51B, and a nearby compact extragalactic source. Our study detects high-velocity (HV) H I clouds (above 83 km/s) that coincide with W51B, but finds that the clouds are behind W51B. Both W51C and G49.2-0.35 have similar highest velocity absorption features at ∼70 km/s. The H II region G49.1-0.38 is behind the SNR because its H I absorption spectrum has a feature at 83 km/s. These new results argue against previous claims that the SNR has shocked the HV H I clouds. Therefore, the TeV emission from the complex should not be associated with the HV H I clouds. W51C has a distance of about 4.3 kpc, smaller than the tangent point distance of 5.5 kpc in that direction, but still in the Sagittarius spiral arm.

Abstract Copyright:

Journal keyword(s): cosmic rays - H II regions - ISM: lines and bands - ISM: supernova remnants

Status in Simbad:  being processed

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1059 1
2 IC 443 SNR 06 18 02.7 +22 39 36           ~ 1084 1
3 SNR G006.4-00.1 SNR 18 01 22.7 -23 17 20           ~ 637 1
4 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 807 2
5 NAME Sgr Arm PoG 19 00 -30.0           ~ 506 1
6 HESS J1923+141 gam 19 23.0 +14 06           ~ 10 0
7 GAL 049.1-00.4 HII 19 23 +14.2           ~ 7 0
8 GAL 049.2-00.3 HII 19 23 03 +14 16.2           ~ 23 0
9 SNR G049.1-00.1 SNR 19 23 19.300 +14 09 21.00           ~ 237 0
10 [OMN2000] Region 3 PoC 19 23 29.3 +14 31 38           ~ 149 0
11 W 51b SFR 19 23 32.8 +14 29 56           ~ 76 0
12 W 51 SNR 19 23 50 +14 06.0           ~ 1130 1
13 GAL 049.21-00.96 ? 19 25.3 +14 00           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.02.18-05:24:13

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