2020ApJ...891..107R

Query : 2020ApJ...891..107R

2020ApJ...891..107R - Astrophys. J., 891, 107-107 (2020/March-2)

Massive stars in the SDSS-IV-APOGEE survey: Wolf-Rayet stars of the WN type.

ROMAN-LOPES A., ROMAN-ZUNIGA C.G., BORISSOVA J., RAMIREZ-PRECIADO V., HERNANDEZ J. and MINNITI D.

Abstract (from CDS):

In this paper, we describe the results obtained in our study of Galactic Wolf-Rayet stars of the WN type, using the APOGEE2 spectrographs. The APOGEE2 WN star near-infrared spectra presented here were selected through a careful examination of the APOGEE2 DR16 sample, being compound of at least one exemplar of each Wolf-Rayet star from WN4 to WN11 types. Besides the APOGEE2 WN sample, we also identified three new Galactic exemplars of the WN type. The first is WR 147-1, a narrow-lined Wolf-Rayet star of the WN4-5 type located in the direction of the Cygnus-X North complex. The two remaining objects, WR 48-11 and WR 48-12, are found at projected angular distances of several arcminutes southwest from the Danks 1 cluster. WR 48-12 has an estimated heliocentric distance of 7.0–3.0+5.0 kpc, which is not compatible (within the quoted uncertainties) with that of about 3.8 ± 0.6 kpc for the G305 complex. On the other hand, WR 48-11 has a probable heliocentric distance of 19.0–4.7+6.5 kpc, which is about three times that of the former, implying that it is probably placed well behind the G305 complex, perhaps at the outermost portion of the Perseus arm.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Stellar types - O stars

Simbad objects: 39

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Number of rows : 39
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 IC 1848 OpC 02 51 19.4 +60 25 32   6.87 6.5     ~ 522 2
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
3 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
4 Brey 20 WR* 05 16 38.8431915960 -69 16 40.826569980 13.791 14.345 14.676 15.05 14.336 WN4b 45 0
5 HD 269549 WR* 05 26 42.5908088736 -69 06 57.344865912 14.308 14.53 14.76 15.11 14.589 WN4b 50 0
6 LHA 120-S 108 WR* 05 27 42.6930652824 -69 10 00.379546536 12.243 13.232 13.41 13.67 13.287 WN8ha 48 0
7 HD 269582 WR* 05 27 52.6621673400 -68 59 08.488879836 12.206 10.818 11.093 12.70 11.234 WN10h 117 0
8 Brey 38 WR* 05 28 17.9135754480 -69 02 35.894733612   15.22 15.26     WN4o 36 0
9 Brey 44a WR* 05 31 18.0558143832 -69 08 45.425541264   14.55 14.26 14.26   WN8ha 31 0
10 Brey 56 WR* 05 35 42.1981380456 -69 12 34.589718936 12.969 13.708 13.587   13.325 WN5ha 43 1
11 LHA 120-S 125 WR* 05 35 54.3748881672 -68 59 07.890914940 12.463 13.324 13.266 13.33 12.609 WN9ha 77 0
12 HD 269883 WR* 05 37 40.4906298216 -69 07 57.672227892 13.454 14.184 14.077 14.03 13.492 WN7h 53 0
13 LHA 120-S 131 WR* 05 38 24.2013464832 -69 29 13.425508392   13.15 12.89 12.91   WN11 28 0
14 Brey 81 WR* 05 38 36.4071127800 -69 06 57.534295248   14.02 13.76   12.80 WN8 41 0
15 HD 38282 WR* 05 38 53.3783458680 -69 02 00.895545204   10.98 11.11 11.26   WN5/6h+WN6/7h 192 1
16 HD 269928 WR* 05 38 57.0667692816 -69 06 05.660419140   12.02 11.94 12.00 11.58 WN6/7 143 0
17 W61 3-8 WR* 05 38 58.0963884840 -69 29 19.558532292       12.51 12.43 WN9h 61 0
18 HD 38344 WR* 05 39 11.3190030600 -69 02 01.571056044 12.323 13.04 12.993 13.07 12.574 WN5h 78 0
19 LHA 120-S 142 WR* 05 44 31.0203138528 -69 20 15.441467316 11.946 12.85 12.71 12.80 12.260 WN11h 38 0
20 Brey 99 WR* 05 45 24.1680967944 -67 05 56.733951696 14.221 14.69 14.81 14.88 14.371 WN4b(h) 41 0
21 LHA 120-S 61 WR* 05 45 51.9388258704 -67 14 25.937264544 10.870 11.86 11.95 12.09 11.931 WN11h 100 0
22 THA 35-II-117 WR* 10 50 46.2934184640 -60 28 41.248002648   13.29 12.36 12.05   WN7h+O 52 0
23 WR 42a WR* 11 12 15.7421151480 -61 05 04.801691760   19.07 17.61     WN5b 11 0
24 WR 42c WR* 11 14 01.4808254568 -61 03 47.709141876   17.92 16.56     WN5o 15 0
25 NAME Crux Arm PoG 12 30 -60.0           ~ 91 0
26 WR 48-11 WR* 13 11 35.60088 -62 45 32.4360           WN9h 8 0
27 WR 48-12 WR* 13 11 36.7377695832 -62 49 59.582848620           WN9h 7 0
28 Cl Danks 1 OpC 13 12 29.0 -62 41 56           ~ 80 0
29 Cl Danks 2 OpC 13 12 53.3 -62 40 52           ~ 73 0
30 NAME G305 Complex SFR 13 13 -62.7           ~ 72 0
31 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
32 NAME Cyg X Cld 20 30 04.7973633 +40 51 36.002197           ~ 962 1
33 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
34 NAME Cygnus X North MoC 20 37.0 +41 56           ~ 33 0
35 WR 147-1 WR* 20 38 22.9266279192 +42 28 03.408599172           WN5 4 0
36 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 423 1
37 NAME DR 21(OH) M Rad 20 39 01 +42 29.8           ~ 91 0
38 DR 21 SFR 20 39 01.6 +42 19 38           O4.5 1121 0
39 NAME Cyg X FIR 36 Rad 20 39 01.6 +42 22 47           ~ 124 1

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