2003A&A...404L..29P


Query : 2003A&A...404L..29P

2003A&A...404L..29P - Astronomy and Astrophysics, volume 404, L29-32 (2003/6-3)

New type of brightness variations of the colliding wind WO4 + O5((f)) binary WR30a.

PAARDEKOOPER S.J., VAN DER HUCHT K.A., VAN GENDEREN A.M., BROGT E., GIELES M. and MEIJERINK R.

Abstract (from CDS):

We present new photometric observations in Johnson V and B of WR30a, revealing relative dramatic changes in brightness of 0.2mag. These variations occur on a time scale of hours, and are only seen in V. We argue that they are not caused by dust extinction, but either by a dramatic change in the strength of the CIV 5801-12Å emission line doublet due to a de-excitation process, or by some unknown continuum effect.

Abstract Copyright:

Journal keyword(s): stars: binaries - stars: Wolf-Rayet - stars: individual: WR30a

VizieR on-line data: <Available at CDS (J/A+A/404/L29): table2.dat table3.dat table4.dat>

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 MR 30 WR* 10 51 06.0017663106 -62 17 01.648960573   11.69 11.35 11.32   WC6+O7.5V 95 0
2 [MS70] 4 WR* 10 51 38.9063160120 -60 56 34.907455570 13.57 13.80 12.78 12.56   WO4+O5III/V((f)) 50 0

    Equat.    Gal    SGal    Ecl

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2021.07.25-15:07:05

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