The orbit and stellar masses of the archetype colliding-wind binary WR 140

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Thomas J. D., Richardson N. D., Eldridge J. J., Schaefer G. H., Monnier J. D., Sana H., ...Daha Fazla

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, cilt.504, sa.4, ss.5221-5230, 2021 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 504 Sayı: 4
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1093/mnras/stab1181
  • Dergi Adı: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, INSPEC, Metadex, zbMATH, DIALNET, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.5221-5230
  • Anahtar Kelimeler: binaries: general, stars: fundamental parameters, stars: Wolf-Rayet, stars: winds; outflows, stars: individual: WR 140, WOLF-RAYET STARS, INTERACTING BINARIES, SPIN RATES, EVOLUTION, ROTATION, DISTANCE, SYSTEM, IMPACT, TIDES
  • Ankara Üniversitesi Adresli: Evet

Özet

We present updated orbital elements for the Wolf-Rayet (WR) binary WR 140 (HD 193793; WC7pd + O5.5fc). The new orbital elements were derived using previously published measurements along with 160 new radial velocity measurements across the 2016 periastron passage of WR 140. Additionally, four new measurements of the orbital astrometry were collected with the CHARA Array. With these measurements, we derive stellar masses of M-WR = 10.31 +/- 0.45 M-circle dot and M-O = 29.27 +/- 1.14 M-circle dot. We also include a discussion of the evolutionary history of this system from the Binary Population and Spectral Synthesis model grid to show that this WR star likely formed primarily through mass-loss in the stellar winds, with only a moderate amount of mass lost or transferred through binary interactions.