Variable dust emission by WC type Wolf-Rayets Virtual Observatory Resource

Authors
  1. Williams P.M.
  2. Published by
    CDS
Abstract

Photometry at 3.4 and 4.6{mu}m of 128 Population I WC type Wolf-Rayet stars in the Galaxy and 12 in the Large Magellanic Cloud (LMC) observed in the WISE NEOWISE-R survey was searched for evidence of circumstellar dust emission and its variation. Infrared spectral energy distributions (SEDs) were assembled, making use of archival r, i, Z, and Y photometry to determine reddening and stellar wind levels for the WC stars found in recent IR surveys and lacking optical photometry. From their SEDs, 10 apparently non-variable stars were newly identified as dust makers, including three, WR 102-22, WR 110-10, and WR 124-10, having subtype earlier than WC8-9, the first such stars to show this phenomenon. The 11 stars found to show variable dust emission include six new episodic dust makers, WR 47c, WR 75-11, WR 91-1, WR 122-14, and WR 125-1 in the Galaxy and HD 38030 in the LMC. Of previously known dust makers, NEOWISE-R photometry of WR 19 captured its rise to maximum in 2018 confirming the 10.1-yr period, that of WR 125 the beginning of a new episode of dust formation suggesting a period near 28.3yr. while that of HD 36402 covered almost a whole period and forced revision of it to 5.1yr.

Keywords
  1. Wolf-Rayet stars
  2. Infrared photometry
  3. Extinction
  4. Variable stars
  5. Milky Way Galaxy
  6. Magellanic Clouds
Bibliographic source Bibcode
2019MNRAS.488.1282W
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/488/1282
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/488/1282

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/488/1282
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/488/1282
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/488/1282
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http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/488/1282/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/488/1282/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/488/1282/table1?
IVOA Cone Search SCS
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http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/488/1282/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/488/1282/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/488/1282/table2?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/488/1282/table19?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/488/1282/table19?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/488/1282/table19?

History

2023-02-02T13:27:57Z
Resource record created
2023-02-02T13:27:57Z
Created
2023-07-21T11:20:24Z
Updated

Contact

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