2014AJ....147..115F


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET18:39:11

2014AJ....147..115F - Astron. J., 147, 115 (2014/May-0)

Characterizing Wolf-Rayet stars in the near- and mid-infrared.

FAHERTY J.K., SHARA M.M., ZUREK D., KANAREK G. and MOFFAT A.F.J.

Abstract (from CDS):

We present refined color-color selection criteria for identifying Wolf-Rayet (WR) stars using available mid-infrared (MIR) photometry from WISE in combination with near-infrared (NIR) photometry from the Two Micron All Sky Survey. Using a sample of spectrally classified objects, we find that WR stars are well distinguished from the field stellar population in the (W1 - W2) versus (J - Ks) color-color diagram, and further distinguished from other emission line objects such as planetary nebulae, Be, and cataclysmic variable stars using a combination of NIR and MIR color constraints. As proof of concept we applied the color constraints to a photometric sample in the Galactic plane, located WR star candidates, and present five new spectrally confirmed and classified WC (1) and WN (4) stars. Analysis of the 0.8-5.0 µm spectral data for a subset of known, bright WC and WN stars shows that emission lines (primarily He I) extend into the 3.0-5.0 µm spectral region, although their strength is greatly diminished compared to the 0.8-2.5 µm region. The WR population stands out relative to background field stars at NIR and MIR colors due to an excess continuum contribution, likely caused by free-free scattering in dense winds. Mean photometric properties of known WRs are presented and imply that reddened late-type WN and WC sources are easier to detect than earlier-type sources at larger Galactic radii. WISE W3 and W4 images of 10 WR stars show evidence of circumstellar shells linked to mass ejections from strong stellar winds.

Abstract Copyright:

Journal keyword(s): Galaxy: disk - Galaxy: stellar content - planetary nebulae: general - stars: emission-line, Be - stars: Wolf-Rayet - surveys

Nomenclature: Table 5: [FSZ2014] WR1343-193E N=1, [FSZ2014] WRNNNN-ANN N=3, [FSZ2014] WR1361-1583 N=1, [FSZ2014] WR1327-14AF N=1, [FSZ2014] WR1373-1FBA N=1.

Simbad objects: 28

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Number of rows : 28

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 56925 WR* 07 18 29.1313276537 -13 13 01.513156589 11.21 11.74 11.56 11.40   WN4b 160 0
2 HD 62910 WR* 07 44 58.2216344436 -31 54 29.553631132 10.08 10.44 10.10 10.17   WN6/WC4 119 0
3 HD 86161 WR* 09 54 52.9034376427 -57 43 38.273623332 7.94 8.65 8.36 8.93   WN8h 206 0
4 WR 35 WR* 11 00 21.86 -61 13 52.3   14.58 13.83     WN6h-w 32 0
5 HD 96548 WR* 11 06 17.2033098417 -65 30 35.237611013 7.10 7.80 7.70 8.49   WN8h 395 0
6 [GKF2010] MN23 WR* 15 35 26.5318911560 -56 04 12.312866370           WN7 5 0
7 2MASS J16321298-4750358 WR* 16 32 12.986 -47 50 35.88           WN5b 4 0
8 2MASS J16324808-4744493 WR* 16 32 48.1231805673 -47 44 49.689589342     17.74     WN9 2 1
9 2E 3714 WR* 16 32 48.511 -47 45 06.27           Ofpe/WN9 6 0
10 NAME PCG 11 WR* 16 33 48.7366700550 -49 28 44.011452419   17.01 15.15   12.15 WN7h 7 1
11 HD 151932 WR* 16 52 19.2478420644 -41 51 16.269632432 6.06 6.79 6.51 7.64   WN7h 296 0
12 HD 152270 WR* 16 54 19.6991728950 -41 49 11.535393651 6.26 6.80 6.597 6.72 6.39 WC7+O5-8 287 0
13 HD 152408 s*b 16 54 58.5049001684 -41 09 03.091715510 5.17 5.92 5.77 7.00   O8Iape 352 0
14 HD 156327 WR* 17 18 23.0613730 -34 24 30.630847 9.88 9.95 9.32 9.67   WC7+B0III 117 0
15 HD 156385 WR* 17 19 29.9012727857 -45 38 23.874796927 6.55 6.97 6.92 8.11   WC7 157 0
16 WR 91 WR* 17 20 22.0232742995 -38 56 48.379201459   17.70 16.2     WN7 34 0
17 HD 157451 WR* 17 25 23.2779746024 -43 29 31.469615959 10 10.59 10.20 10.46   WC9 84 0
18 HD 318016 WR* 17 37 13.7437507039 -33 27 56.015803304 13.71 13.16 11.81 11.42   WN8/WC7 76 0
19 WR 102-22 WR* 17 59 02.3382191095 -24 17 00.055933869           WC7 2 0
20 2MASS J18024620-2236394 WR* 18 02 46.208 -22 36 39.47           WN6 1 0
21 [GKF2010] MN76 WR* 18 07 05.1607005464 -20 15 16.702574138           WN9 6 0
22 HD 165763 WR* 18 08 28.4691215895 -21 15 11.182287576 7.16 7.54 7.82 8.55   WC6 271 0
23 2MASS J18102741-1856196 WR* 18 10 27.415 -18 56 19.63           ~ 1 0
24 WR 120bc WR* 18 42 08.2725773413 -03 51 02.908117744           WN8-9h 12 0
25 EM* AS 320 WR* 18 44 13.1527220304 -03 47 57.779718279 13.7 13.340 13.983     WC9d 114 0
26 2MASS J19000509+0347270 WR* 19 00 05.09736 +03 47 27.0996           WN6 2 0
27 2MASS J19104563+0849276 WR* 19 10 45.638 +08 49 27.64           ~ 2 0
28 2MASS J19205043+1318412 WR* 19 20 50.431 +13 18 41.21           WN7 1 0

    Equat.    Gal    SGal    Ecl

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2021.03.02-18:39:11

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