Synthetic light curves of spotted stars: Unique or not unique?

Creative Commons License

Eker Z.

ASTROPHYSICAL JOURNAL, cilt.473, sa.1, ss.388-402, 1996 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 473 Sayı: 1
  • Basım Tarihi: 1996
  • Doi Numarası: 10.1086/178153
  • Dergi Adı: ASTROPHYSICAL JOURNAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.388-402
  • Anahtar Kelimeler: stars, activity, stars, variables, other (spotted), CANUM-VENATICORUM STARS, RS-CVN STARS, CHROMOSPHERICALLY ACTIVE STARS, II-PEGASI, BINARY-SYSTEMS, ROTATIONAL-MODULATION, SV CAMELOPARDALIS, ORBITAL PLANES, AB-DOR, PHOTOMETRY
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

The inverse photometric problem has been solved for classical one-spot models. Analytical formulae are presented to obtain spot parameters [size (r), location (lambda,beta), temperature (T-s), and the inclination of rotation axis (i)]l directly from light curves. Original spot parameters have been recovered successfully from the given V and R synthetic curves of various test models. The effective temperature of the photosphere and the linear limb-darkening coefficients at two color bands are only a priori knowledge to derive the rest of the parameters. Nonunique values of i and beta, which are obtained as two pairs (i, beta), are the results of circular symmetry of the spot shape on a spherical star. The problem is overcome if noncircular shape or multiple spots were used. Generalization of given formulas to multispot modeling is introduced briefly. Consistency of starspot modeling and uniqueness of light curves with respect to the parameters are discussed.