Absolute parameters of the short-period binary HY Virginis from JHK light curves and spectroscopy

Bibcode
2008NewA...13..304M
DOI
10.1016/j.newast.2007.11.001
Martínez-País, I. G.; Arévalo, M. J.; Lázaro, C.
Bibliographical reference

New Astronomy, Volume 13, Issue 5, p. 304-313.

Advertised on:
7
2008
Journal
New Astronomy
Number of authors
3
IAC number of authors
3
Citations
1
Refereed citations
1
Description
We present the first light curves in the infrared J, H and K filters of HY Vir. Based on HY Vir and template stars spectra in the region 8440 8870 Å, we classify as F0 both stellar components of the binary. Also, we obtain the first radial velocity curves of the system. The analysis of the JHK light curves is carried out using a code based in ATLAS model atmospheres and Roche geometry. From the spectroscopic and photometric data, absolute orbital and stellar parameters are derived that allow to classify HY Vir as a well detached binary with similar components. The comparison of the stellar components parameters with evolutionary models show that both components are well reproduced by an isochrone of age t ≃ 1.2 × 109 years, indicating that HY Vir is a relatively young binary. From published visual and our own infrared photometry we find not evidence of any significant infrared excess in the system. The estimated distance is d = 185 ± 15 pc, and we derive an interstellar reddening E(B - V) ≃ 0.04.
Related projects
Representación de la variable cataclísmica SS Cygni (Chris Moran)
Binary Stars

The study of binary stars is essential to stellar astrophysics. A large number of stars form and evolve within binary systems. Therefore, their study is fundamental to understand stellar and galactic evolution. Particularly relevant is that binary systems are still the best source of precise stellar mass and radius measurements. Research lines

Pablo
Rodríguez Gil
In progress
Type
Refereed
Stellar & Interstellar Physics (FEEI)

It may interest you

  • Refereed
    CMAG: A Mission to Study and Monitor the Inner Corona Magnetic Field

    Measuring magnetic fields in the inner corona, the interface between the solar chromosphere and outer corona, is of paramount importance if we aim to understand the energetic transformations taking place there, and because it is at the origin of processes that lead to coronal heating, solar wind acceleration, and of most of the phenomena relevant

    Orozco Suárez, David et al.

    Advertised on:

    11
    2023
    Bibcode
    2023Aeros..10..987O
    Citations
    0
  • Refereed
    Minutes-duration optical flares with supernova luminosities

    In recent years, certain luminous extragalactic optical transients have been observed to last only a few days1. Their short observed duration implies a different powering mechanism from the most common luminous extragalactic transients (supernovae), whose timescale is weeks2. Some short-duration transients, most notably AT2018cow (ref. 3), show

    Ho, Anna Y. Q. et al.

    Advertised on:

    11
    2023
    Bibcode
    2023Natur.623..927H
    Citations
    0
  • Refereed
    In search of gravity mode signatures in main sequence solar-type stars observed by Kepler

    Gravity modes (g modes), mixed gravito-acoustic modes (mixed modes), and gravito-inertial modes (gi modes) possess unmatched properties as probes for stars with radiative interiors. The structural and dynamical constraints that they are able to provide cannot be accessed by other means. While they provide precious insights into the internal

    Breton, S. N. et al.

    Advertised on:

    11
    2023
    Bibcode
    2023A&A...679A.104B
    Citations
    0