Standard stellar luminosities: what are typical and limiting accuracies in the era after Gaia?

Eker Z., Soydugan F., Bilir S., Bakis V.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, cilt.507, sa.3, ss.3583-3592, 2021 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 507 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1093/mnras/stab2302
  • 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.3583-3592
  • Anahtar Kelimeler: stars: fundamental parameters, stars: general, EMPIRICAL MASS-LUMINOSITY, MAIN-SEQUENCE STARS, BOLOMETRIC CORRECTIONS, EFFECTIVE TEMPERATURES, EXTINCTION COEFFICIENTS, BINARY, RADIUS, MAGNITUDE, COLORS, SCALE
  • İstanbul Üniversitesi Adresli: Evet

Özet

Methods of obtaining stellar luminosities (L) have been revised and a new concept, standard stellar luminosity, has been defined. In this paper, we study three methods: (i) a direct method from radii and effective temperatures; (ii) a method using a mass-luminosity relation (MLR); and (iii) a method requiring a bolometric correction. If the unique bolometric correction (BC) of a star extracted from a flux ratio (fv/f(Bol)) obtained from the observed spectrum with sufficient spectral coverage and resolution are used, the third method is estimated to provide an uncertainty (Delta L/L) typically at a low percentage, which could be as accurate as 1 per cent, perhaps more. The typical and limiting uncertainties of the predicted L of the three methods were compared. The secondary methods, which require either a pre-determined non-unique BC or MLR, were found to provide less accurate luminosities than the direct method, which could provide stellar luminosities with a typical accuracy of 8.2-12.2 per cent while its estimated limiting accuracy is 2.5 per cent.