2009A&A...500..867S


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.21CET13:22:18

2009A&A...500..867S - Astronomy and Astrophysics, volume 500, 867-872 (2009/6-3)

Post common envelope binaries from the SDSS. VI. SDSSJ120615.73+510047.0: a new low accretion rate magnetic binary.

SCHWOPE A.D., NEBOT GOMEZ-MORAN A., SCHREIBER M.R. and GAENSICKE B.T.

Abstract (from CDS):

We report the discovery of the ninth pre-polar consisting of a late-type ZAMS secondary and a magnetic white dwarf. The white dwarf accretes at an extreme low rate, {dot}(M)∼10–14M/yr, from the wind of the companion donor star. The source was found in our systematic search for WD/MS binaries within SDSS/SEGUE. Based on seven Sloan spectra we estimate a binary period of ∼200, 230, or 270min. The UV to IR spectral energy distribution was decomposed into a dM3-dM4 ZAMS secondary and a cool white dwarf, ∼9000K, which consistently imply a distance between 360 and 420pc. The optical spectrum displays one pronounced cyclotron hump, likely originating from a low-temperature plasma, ∼1keV, in a field of 108MG. We comment on the evolutionary link between polars and pre-polars.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - stars: magnetic fields - binaries: close - stars: individual: SDSS J120615.73+510047.0

Simbad objects: 7

goto Full paper

goto View the reference in ADS

Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* EQ Cet AM* 01 28 52.5444761914 -23 39 43.961138249   19.06 17.97 17.71   ~ 26 0
2 V* EF Eri NL* 03 14 13.2527107604 -22 35 42.917018996   15.4 14.53 13.5   ~ 409 0
3 V* V1309 Ori AM* 05 15 41.4123841919 +01 04 40.479107028           M0.5 97 0
4 V* IL Leo CV* 10 31 00.5569721340 +20 28 32.303887137   18.67 18.71     ~ 11 0
5 SDSS J120615.73+510047.0 ** 12 06 15.7366483226 +51 00 47.223400600           ~ 3 1
6 L 768-119 SB* 15 42 06.5440661894 -19 28 18.265293270 14.559 13.46 11.855 10.738 9.305 M3 66 0
7 NAME Barnard's star BY* 17 57 48.4997994034 +04 41 36.111354228 12.497 11.24 9.511 8.298 6.741 M4V 628 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2009A&A...500..867S and select 'bookmark this link' or equivalent in the popup menu


2019.11.21-13:22:18

© Université de Strasbourg/CNRS

    • Contact