2018MNRAS.473..148P

Query : 2018MNRAS.473..148P

2018MNRAS.473..148P - Mon. Not. R. Astron. Soc., 473, 148-164 (2018/January-1)

The first optical spectra of Wolf-Rayet stars in M101 revealed with Gemini/GMOS.

PLEDGER J.L., SHARA M.M., WILDE M., CROWTHER P.A., LONG K.S., ZUREK D. and MOFFAT A.F.J.

Abstract (from CDS):

Deep narrow-band Hubble Space Telescope (HST) imaging of the iconic spiral galaxy M101 has revealed over a thousand new Wolf-Rayet (WR) candidates. We report spectrographic confirmation of 10 He II-emission line sources hosting 15 WR stars. We find WR stars present at both sub- and super-solar metallicities with WC stars favouring more metal-rich regions compared to WN stars. We investigate the association of WR stars with H II regions using archival HST imaging and conclude that the majority of WR stars are in or associated with H II regions. Of the 10 emission lines sources, only one appears to be unassociated with a star-forming region. Our spectroscopic survey provides confidence that our narrow-band photometric candidates are in fact bona fide WR stars, which will allow us to characterize the progenitors of any core-collapse supernovae that erupt in the future in M101.

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

Journal keyword(s): techniques: imaging spectroscopy - Stars: Wolf-Rayet - H ii regions - galaxies: stellar content - galaxies: stellar content

Nomenclature: Table 2, Tables 3-5, Col(1): [PSW2018] WR NNNN N=10.

Simbad objects: 41

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Number of rows : 41
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [BWF97] IC 10 X-1 HXB 00 20 29.03310480 +59 16 51.7609560           ~ 180 0
2 HD 4004 WR* 00 43 28.3971737448 +64 45 35.384652468 10.28 10.718 10.138     WN4-s 205 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 CXOU J005510.0-374212 HXB 00 55 09.990 -37 42 12.16     22.44     WNE 139 1
5 OGLE 2014-SN-131 SN* 01 14 00.81 -77 06 16.5           SNIbn 19 0
6 NAME M33 X-7 HXB 01 33 34.13 +30 32 11.3 17.50 18.80 18.70     O 187 2
7 SN 2002ap SN* 01 36 23.85 +15 45 13.2   13.11 14.54     SNIc-BL 587 1
8 M 74 G 01 36 41.7451236624 +15 47 01.107512304 10.52 10.00 9.46 9.16   ~ 1934 1
9 HD 50896 WR* 06 54 13.0439608392 -23 55 42.023319852 5.74 6.63 6.91 7.74   WN4b 794 0
10 HD 56925 WR* 07 18 29.1311435688 -13 13 01.513932528 11.21 11.74 11.56 11.40   WN4b 181 0
11 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1887 1
12 CD-45 4482 WR* 08 44 47.2901340000 -45 58 55.417387548 10.95 11.29 10.74 10.58   WN8h+? 108 0
13 HD 76536 WR* 08 54 59.1670918944 -47 35 32.662167792 9.04 9.13 8.80 9.52   WC 129 0
14 HD 89358 WR* 10 17 02.2743231360 -57 54 46.875258324 11.1 11.19 10.83 10.59   WN4-s 181 1
15 HD 92809 WR* 10 41 38.3243333544 -58 46 18.723223308 8.95 9.28 9.03 9.60   WC6 163 0
16 HZ 44 HS* 13 23 35.2629445608 +36 07 59.544140304 10.186 11.42 11.65 12.00 11.995 sdBN0VIIHe28 439 0
17 HD 117297 WR* 13 30 53.2514208432 -62 04 51.858208308 10.81 11.10 10.90 10.70   WC8 100 0
18 HGGK 470 HII 14 03 02.3 +54 20 10           ~ 4 0
19 [S71] M 101 2 HII 14 03 04.3 +54 19 28           ~ 13 0
20 HGGK 505 HII 14 03 04.400 +54 19 23.17           ~ 3 0
21 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
22 HGGK 671 HII 14 03 13.0 +54 19 46           ~ 4 0
23 HGGK 733 HII 14 03 16.3 +54 20 42           ~ 2 0
24 HGGK 872 HII 14 03 23.1 +54 19 25           ~ 2 0
25 HGGK 901 HII 14 03 24.3 +54 19 42           ~ 2 0
26 HGGK 998 HII 14 03 29.600 +54 22 28.31           ~ 5 0
27 HGGK 1044 HII 14 03 32.9 +54 20 14           ~ 5 0
28 NGC 5462 HII 14 03 53.0997760440 +54 22 06.493306404           ~ 85 0
29 iPTF 13bvn SN* 15 00 00.152 +01 52 53.17           SNIb 211 0
30 HD 134877 WR* 15 14 57.7186057272 -59 50 30.215432688 12.13 12.19 11.34 11.08   WN8(h) 112 0
31 WRAY 16-172 WR* 15 18 20.7584521536 -59 38 17.324150928 14.83 14.52 13.28 12.99   WC7 51 2
32 HD 165763 WR* 18 08 28.4692108104 -21 15 11.183076540 7.16 7.54 7.82 8.55   WC6 286 0
33 HD 169010 WR* 18 23 16.3427231112 -13 43 26.102574732 13.53 12.99 12.02 11.95   WC 82 0
34 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0
35 HD 191765 WR* 20 10 14.1928045152 +36 10 35.070683376 7.64 8.08 8.08     WN6-s 452 0
36 HD 192103 WR* 20 11 53.5274337792 +36 11 50.525765304 7.77 8.13 8.11     WC8+OB: 339 0
37 HD 192163 WR* 20 12 06.5418877464 +38 21 17.784181008 7.12 7.49 7.50     WN6(h)-s 715 1
38 MR 110 WR* 20 32 03.0201049320 +41 15 20.499732216   15.99 13.97     WC5 85 0
39 HD 213049 WR* 22 27 17.8187635824 +56 15 11.770681752   11.270 10.928 10.922   WC6 93 0
40 NGC 7793 GiG 23 57 49.7540045856 -32 35 27.701550744 10.26 9.74 9.28 9.06 9.7 ~ 1188 2
41 NAME Local Group GrG ~ ~           ~ 9325 0

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