2001AJ....122..194R


Query : 2001AJ....122..194R

2001AJ....122..194R - Astron. J., 122, 194-206 (2001/July-0)

The influence of massive stars in the interstellar medium of IC 1613: the supernova remnant S8 and the nebula S3 associated with a WO star.

ROSADO M., VALDEZ-GUTIERREZ M., GEORGIEV L., ARIAS L., BORISSOVA J. and KURTEV R.

Abstract (from CDS):

We present a detailed kinematic analysis of two selected nebulae in the Local Group irregular galaxy IC 1613. The nebulae are S8, the only known supernova remnant in this galaxy, and S3, a Wolf-Rayet nebula associated with the only WO star in this galaxy. For S8 we have obtained and analyzed its radial velocity field, where we found complex profiles that can be fitted by several velocity components. These profiles also show the presence of high-velocity, low-density gas. From this we have obtained the expansion velocity, estimated the preshock density, and calculated the basic kinematic parameters of this supernova remnant (SNR). We suggest that in S8 we are seeing an SNR partially hidden by dust. This suggestion comes from the fact that the SNR is located between two superbubbles where a ridge of obscured material reveals the existence of dust. Moreover, we show that this hypothesis prevails when arguments based on energy are taken into account. In the case of S3 this nebula shows bipolar structure. By using its kinematics, we have analyzed its two lobes and its ``waist'', as well as its relation with the nearest superbubbles. For the first time we are able to see that the northwestern lobe is closed, showing a cloverleaf shape. This fact allows us to obtain a better quantitative knowledge of the nebula as a whole. Furthermore, we found evidence of expansion in the northwestern lobe. In the light of our results, we can state that these nebulae are the product of very massive stellar evolution. The influence these stars still have in shaping their surrounding gas is surprising and so is the energy liberated to the interstellar medium of this galaxy.

Abstract Copyright:

Journal keyword(s): galaxies: individual: IC 1613 - Galaxies: Irregular - ISM: individual (Sandage 3, Sandage 8) - ISM: Kinematics and Dynamics - ISM: Supernova Remnants

CDS comments: S3 and S8 are [S71b] HII 3 and [S71b] HII 8.

Simbad objects: 15

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Number of rows : 15
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 [AFF2006] 6628-2 Ce* 01 04 44.34 +02 05 29.0   21.15 20.284 19.82 19.45 ~ 8 0
2 IC 1613 GiC 01 04 54.2 +02 08 00   10.42 10.01 9.77   ~ 1175 2
3 [AM85] IC 1613 2 Pe* 01 04 55.6 +02 05 39   20.5       ~ 6 0
4 [H78] Ass 9 Pe* 01 04 58.4250224477 +02 05 39.596810914   20.7       ~ 8 0
5 [AM85] IC 1613 6 WR* 01 05 01.6177966440 +02 04 19.938198792     20.7     WO3 21 1
6 DDB IC 1613 1 SNR 01 05 02.70 +02 08 40.0           ~ 25 0
7 [HLG90] 37 HII 01 05 03.3 +02 04 24           ~ 19 0
8 LHA 120-N 9 HII 04 55 10.9 -67 11 32           ~ 52 1
9 SNR B0535-66.0 SNR 05 35 43.1 -66 01 59           ~ 170 1
10 NGC 2346 PN 07 09 22.5215800440 -00 48 23.610997332   11.76 11.58     A5V 564 0
11 [VRG2001] R17 PoG ~ ~           ~ 4 0
12 [VRG2001] R16 PoG ~ ~           ~ 4 0
13 [VRG2001] R12 PoG ~ ~           ~ 3 0
14 [VRG2001] R9 HII ~ ~           ~ 4 0
15 [MCW88] GS 2 HII ~ ~           ~ 5 0

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2022.10.01-22:38:21

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