Open AccessAbsolute parameters of the Algol binary V505 Sgr from infrared JK light curves
Author(s) -
Lázaro C.,
Arévalo M. J.,
Antonopoulou E.
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.10174.x
Subject(s) - physics , light curve , photometry (optics) , astrophysics , infrared , galaxy rotation curve , radial velocity , astronomy , parallax , binary star , stellar rotation , stars , galaxy , halo
ABSTRACT We present the first light curves of V505 Sgr in the infrared (IR) J and K bands. The light curves are analysed with a code based on Roche geometry and stellar model atmosphere fluxes in order to determine a new set of stellar and orbital parameters. From the visual–IR photometry we find no evidence of IR excess in the system. We study the effect of the non‐synchronous rotation of the primary star in the light and radial velocity curves. The distance of the system is estimated as 112 ± 4 pc , in close agreement with the Hipparcos parallax.