A yellow giant, a peculiar A-type dwarf and an interstellar dust cloud unravel the eclipsing binary TYC 4481-358-1

Norbert Hauck

A yellow giant, a peculiar A-type dwarf and an interstellar dust cloud unravel the eclipsing binary TYC 4481-358-1

Solar and Stellar Astrophysics 2023-03-14 v1

Authors: Norbert Hauck

Abstract

A first solution for the eclipsing binary TYC 4481-358-1 has been found by combining the results of BVIc-photometry with known stellar models and stellar spectral energy distributions (SEDs). The binary shows total and annular eclipses in a circular 90-days orbit. Masses, radii and effective temperatures have been derived: about 3.01 Msun, 14.29 Rsun and 4950 K for the giant, and about 2.39 Msun, 2.39 Rsun and 9600 K for the dwarf. The peculiar dwarf is discolored and shows a Teff - passband dependence from 9000 K in the Ic to 9800 K in the B band. The giant is in its final stage of core helium burning. The interstellar extinction in our line of sight is considerable (Av about 1.44 mag at an elevated Rv of 3.58).

Keywords

eclipsing binary tyc 4481-358-1 yellow giant a-type dwarf interstellar extinction stellar spectral energy distribution

Cite

@article{arxiv.2303.06397,
  title  = {A yellow giant, a peculiar A-type dwarf and an interstellar dust cloud unravel the eclipsing binary TYC 4481-358-1},
  author = {Norbert Hauck},
  journal= {arXiv preprint arXiv:2303.06397},
  year   = {2023}
}

Comments

4 pages including 2 figures and 2 tables; accepted for publication in BAV Rundbrief vol.72, no.2, (2023)

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