2021MNRAS.505.5029W

Query : 2021MNRAS.505.5029W

2021MNRAS.505.5029W - Mon. Not. R. Astron. Soc., 505, 5029-5037 (2021/August-3)

The episodic dust-making Wolf-Rayet star HD 38030 in the Large Magellanic Cloud.

WILLIAMS P.M., MORRELL N.I., BOUTSIA K. and MASSEY P.

Abstract (from CDS):

Mid-infrared photometry of the Wolf-Rayet star HD 38030 in the Large Magellanic Cloud from the NEOWISE-R mission show it to have undergone a dust-formation episode in 2018 and the dust to have cooled in 2019-20. New spectroscopy with the MagE spectrograph on the Magellan I Baade Telescope in 2019 and 2020 show absorption lines attributable to a companion of type near O9.7III-IV. We found a significant shift in the radial velocity of the C IV λλ5801-12 blend compared with the RVs measured in 1984 and 1993. The results combine to suggest that HD 38030 is a colliding-wind binary having short-lived dust formation episodes, like the Galactic systems WR 140 and WR 19, but at intervals in excess of 20 yr.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): binaries: spectroscopic - circumstellar matter - stars: individual: HD 38030 - stars: winds - stars: Wolf-Rayet

Simbad objects: 19

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Number of rows : 19
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
3 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
4 NGC 604 HII 01 34 32.1 +30 47 01           ~ 608 0
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
6 HD 32257 WR* 04 56 02.8931275728 -69 27 21.546891216 13.441 13.962 14.23 14.31 14.514 WC 56 0
7 NGC 1910 As* 05 18 42.50 -69 14 12.1     9.65     ~ 52 1
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
9 HD 36402 WR* 05 26 03.9637892880 -67 29 57.087864096   11.25 11.621 11.65   (WC) 143 0
10 HD 37026 WR* 05 30 12.1637529576 -67 26 08.329055928 12.853 13.16 13.53 13.56 13.856 WC 78 0
11 HD 38030 WR* 05 36 51.3798360240 -69 25 56.740737144 12.023 12.814 12.986 13.21 13.605 WC 43 0
12 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1887 1
13 SPIRITS19q WR* 07 37 18.21 +65 33 49.0           ~ 3 0
14 WR 19 WR* 10 18 04.9885430688 -58 16 26.244521868   14.80 13.85     WC5+O9 74 0
15 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
16 HD 165763 WR* 18 08 28.4692108104 -21 15 11.183076540 7.16 7.54 7.82 8.55   WC6 286 0
17 MR 93 WR* 19 28 15.6142522320 +19 33 21.527693100   14.83       WC7+O9(III) 114 0
18 HD 193793 WR* 20 20 27.9757908696 +43 51 16.286840244 6.90 7.25 6.85 4.58   WC7pd+O5.5fc 754 0
19 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2

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