2017MNRAS.472.4618T


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.05CEST19:08:36

2017MNRAS.472.4618T - Mon. Not. R. Astron. Soc., 472, 4618-4633 (2017/December-3)

Revealing the nebular properties and Wolf-Rayet population of IC10 with Gemini/GMOS.

TEHRANI K., CROWTHER P.A. and ARCHER I.

Abstract (from CDS):

We present a deep imaging and spectroscopic survey of the Local Group irregular galaxy IC10 using Gemini North and GMOS to unveil its global Wolf-Rayet (WR) population. We obtain a star formation rate (SFR) of 0.045 ± 0.023 M yr–1, for IC10 from the nebular H α luminosity, which is comparable to the Small Magellanic Cloud. We also present a revised nebular oxygen abundance of log(O/H) + 12 = 8.40 ± 0.04, comparable to the LMC. It has previously been suggested that for IC10 to follow the WR subtype-metallicity dependance seen in other Local Group galaxies, a large WN population awaits discovery. Our search revealed three new WN stars, and six candidates awaiting confirmation, providing little evidence to support this claim. The new global WR star total of 29 stars is consistent with the Large Magellanic Cloud population when scaled to the reduced SFR of IC10. For spectroscopically confirmed WR stars, the WC/WN ratio is lowered to 1.0; however, including all potential candidates, and assuming those unconfirmed to be WN stars, would reduce the ratio to ∼0.7. We attribute the high WC/WN ratio to the high star formation surface density of IC10 relative to the Magellanic Clouds, which enhances the frequency of high-mass stars capable of producing WC stars.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: Wolf-Rayet - ISM: abundances - galaxies: individual: IC10 - galaxies: individual: IC10

Nomenclature: Table A.1: [TCA2017] TNN (Nos 1-11).

Simbad objects: 65

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Number of rows : 65

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 LGGS J001956.99+591707.5 WR* 00 19 56.99 +59 17 07.5 21.74 22.11 21.47 21.05 20.71 WC4.5 8 0
2 [HL90] 6 HII 00 19 58.6 +59 17 06           ~ 4 0
3 [MAC92] 2 WR* 00 19 59.72 +59 16 55.2           WC4 9 0
4 [HL90] 10 HII 00 20 02.3 +59 18 40           ~ 3 0
5 RSMV 6 WR* 00 20 03.01 +59 18 27.0   23.28 22.20 21.38 20.59 WC4 6 0
6 RSMV 5 WR* 00 20 04.32 +59 18 06.5 22.25 22.52 21.66 21.1 20.53 WC4.5 4 0
7 [TCA2017] T1 WR? 00 20 04.54 +59 18 05.4           ~ 1 0
8 [TCA2017] T2 WR? 00 20 05.60 +59 19 45.7           ~ 1 0
9 [TCA2017] T3 WR? 00 20 06.99 +59 17 47.1           ~ 1 0
10 [HL90] 22 HII 00 20 09.6 +59 19 20           ~ 6 0
11 [HL90] 20 HII 00 20 10.1 +59 19 14           ~ 4 0
12 LGGS J002011.55+591857.9 WR* 00 20 11.55 +59 18 57.9 19.92 20.31 19.62 19.12 18.61 WC4.5 8 0
13 [HL90] 29 HII 00 20 11.7 +59 20 19           ~ 4 0
14 LGGS J002012.84+592008.1 WR* 00 20 12.84 +59 20 08.1 22.24 22.54 21.59 21.15 21.26 WNe 8 0
15 [TCA2017] T4 WR* 00 20 14.47 +59 18 49.9           ~ 1 0
16 RSMV 13 WR* 00 20 15.70 +59 17 22.1           WN5 5 0
17 [BGR2000] Br 1 HII 00 20 17.4 +59 18 40           ~ 14 0
18 [TCA2017] T5 WR* 00 20 17.43 +59 18 39.2           ~ 1 0
19 [TCA2017] T6 WR* 00 20 20.34 +59 18 37.3           ~ 1 0
20 RSMV 9 WR* 00 20 20.41 +59 18 40.1           WNE 5 0
21 RSMV 8 WR* 00 20 20.56 +59 18 37.3 20.38 20.92 20.24 19.63 19.18 WN10 6 0
22 [MAC92] 7 WR* 00 20 22.01 +59 17 41.6           WC4.5 9 0
23 LGGS J002022.68+591846.8 WR* 00 20 22.68 +59 18 46.8   23.45 23.22 22.66   WN3 8 0
24 RSMV 11 WR* 00 20 22.82 +59 17 53.9   23.96 22.8 22.15 20.92 WC4 6 0
25 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1009 0
26 [TCA2017] T7 WR? 00 20 23.35 +59 17 31.2           ~ 1 0
27 LGGS J002023.35+591742.2 WR* 00 20 23.35 +59 17 42.2 21.25 20.93 20.52 20.04 19.94 WC7 12 0
28 RSMV 12 WR* 00 20 25.77 +59 16 48.9   23.53 22.7 21.93 21.31 WNE 9 0
29 [HL90] 106 HII 00 20 25.8 +59 17 25           ~ 8 0
30 [HL90] 111b HII 00 20 26.0 +59 17 42           ~ 9 0
31 LGGS J002026.20+591726.3 WR* 00 20 26.18 +59 17 26.3 21.77 22.23 21.15 20.19 18.85 WC4 11 0
32 [HL90] 111c HII 00 20 26.3 +59 17 57           ~ 16 0
33 RSMV 10 WR* 00 20 26.63 +59 17 05.6   23.21 22.63 21.74 22.22 WC4 9 0
34 LGGS J002026.69+591732.8 mul 00 20 26.69 +59 17 32.8 20.95 21.43 20.89 20.34 19.72 WC? 10 0
35 LGGS J002026.94+591719.9 mul 00 20 26.94 +59 17 19.9 21.18 21.19 20.61 19.97 19.07 WC? 9 0
36 [HL90] 111 HII 00 20 27.0 +59 17 29           ~ 15 1
37 LGGS J002027.02+591818.0 WR* 00 20 27.02 +59 18 18.0   22.95 22.27 21.69 21.14 ~ 9 0
38 [TCA2017] T8 WR? 00 20 27.70 +59 19 15.1           ~ 1 0
39 [MAC92] 24 mul 00 20 27.73 +59 17 37.2           WN 11 0
40 RSMV 2 Em* 00 20 28.0450801719 +59 17 14.195814778 22.06 22.32 21.54 20.84 20.13 WN? 9 0
41 [MAC92] 17 mul 00 20 29.15 +59 16 52.2     21.76     WNE+OB 14 0
42 LGGS J002031.05+591904.2 mul 00 20 31.05 +59 19 04.2   22.94 22.60 22.04 21.70 WN? 7 0
43 [TCA2017] T9 WR? 00 20 32.74 +59 15 46.4           ~ 1 0
44 LGGS J002032.80+591716.4 WR* 00 20 32.79 +59 17 16.4   22.82 21.38 20.09 18.67 WN7 9 0
45 [TCA2017] T10 WR? 00 20 32.98 +59 18 24.1           ~ 1 0
46 LGGS J002034.52+591714.6 WR* 00 20 34.52 +59 17 14.6 22.88 22.59 22.17 21.58 21.09 WC5 10 0
47 [TCA2017] T11 WR? 00 20 35.90 +59 18 49.8           ~ 1 0
48 LGGS J002041.61+591624.8 WR* 00 20 41.61 +59 16 24.8   23.11 22.75 22.19 21.73 WN4 8 0
49 [MAC92] 22 WR* 00 20 52.12 +59 21 33.1           WN 3 0
50 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10946 1
51 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9475 1
52 HD 5980 WR* 00 59 26.5847969465 -72 09 53.927725716   11.13 11.31   11.029 WN4+O7I: 359 1
53 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5692 1
54 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 986 0
55 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14869 1
56 HD 269582 WR* 05 27 52.6620154151 -68 59 08.486272253 12.206 10.818 11.093 12.70 11.234 WN10h 95 0
57 HD 37026 WR* 05 30 12.1637558730 -67 26 08.329160840 12.853 13.16 13.53 13.56 13.856 WC 68 0
58 HD 269883 WR* 05 37 40.494 -69 07 57.71 13.454 14.184 14.077 14.03 13.492 WN7h 39 0
59 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1742 1
60 HD 38282 WR* 05 38 53.3788120199 -69 02 00.896643506   10.98 11.11 11.26   WN5/6h+WN6/7h 150 1
61 HD 93162 WR* 10 44 10.3888220947 -59 43 11.105959983 7.90 8.55 8.80 8.66   O2.5If*/WN6+OB 337 1
62 HD 97809 * 11 13 56.9323365038 -67 47 02.289717820   10.04 9.91     A2V 3 0
63 HD 156385 WR* 17 19 29.9012727857 -45 38 23.874796927 6.55 6.97 6.92 8.11   WC7 154 0
64 BD+28 4211 HS* 21 51 11.0220905905 +28 51 50.366090892 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 736 0
65 NAME Local Group GrG ~ ~           ~ 6998 0

    Equat.    Gal    SGal    Ecl

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2020.08.05-19:08:36

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