J/A+A/553/A28 VI light curves and spectra of V479 And (Gonzalez-Buitrago+ 2013)
Multiwavelength observations of V479 Andromedae:
a close compact binary with an identity crisis.
Gonzalez-Buitrago D., Tovmassian G., Zharikov S., Yungelson L., Miyaji T.,
Echevarria J., Aviles A., Valyavin G.
<Astron. Astrophys. 553, A28 (2013)>
=2013A&A...553A..28G 2013A&A...553A..28G (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, cataclysmic ; Novae ; Photometry ;
Keywords: novae, cataclysmic variables - stars: individual V479 And -
stars: individual: SDSS J001856.93+345444.3
Abstract:
We conducted a multi-wavelength study to unveil the properties of the
extremely long-period cataclysmic variable V479 And. We performed
series of observations, including moderate to high spectral resolution
optical spectrophotometry, X-ray observations with Swift, linear
polarimetry and near-IR photometry. This binary system is a
low-inclination ∼17° system with a 0.594093(4) day orbital period.
The absorption line complex in the spectra indicate a G8-K0 spectral
type for the donor star, which has departed from the zero-age main
sequence. This implies a distance to the object of about 4kpc. The
primary is probably a massive 1.1-1.4M☉ magnetic white dwarf,
accreting matter at a rate dM/dt>10-10M☉/yr. This rate can be
achieved if the donor star fills its corresponding Roche lobe, but
there is little observational evidence for a mass-transfer stream in
this system. An alternative explanation is a stellar wind from the
donor star, although such a high rate mass loss is not anticipated
from a subgiant. If the strongly magnetic white dwarf in V479 And is
confirmed by future observations, the system the polar with the
longest observed orbital period. We also discuss the evolutionary
state of V479 And.
Description:
Time-resolved photometry in V and I bands of V479 And.
Flux-calibrated spectra of V479 And.
Objects:
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RA (2000) DE Designation(s)
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00 18 56.91 +34 54 44.1 V479 And = V* V479 And
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
photv.dat 17 278 V band photometry of V479 And
photi.dat 19 472 I band photometry of V479 And
list.dat 85 46 List of FITS spectra
sp/* . 46 Individual FITS spectra
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Byte-by-byte Description of file: photi.dat photv.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 d HJD Heliocentric Julian date (HJD-2455000)
12- 19 F8.5 mag mag I or V magnitude
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- spFile Name of the spectrum FITS file
in subdirectory sp
22- 31 A10 --- Obs.Date Observation date (YYYY/MM/DD or YYYY-YYYY)
33- 85 A53 --- Title Title of the file
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Acknowledgements:
Sergey Zharikov, zhar(at)astrosen.unam.mx
(End) S. Zharikov [OAN SPM, IA UNAM, Mexico], P. Vannier [CDS] 22-Mar-2013