2017ApJ...835..277H


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST17:39:52

2017ApJ...835..277H - Astrophys. J., 835, 277-277 (2017/February-1)

A deep test of radial differential rotation in a helium-atmosphere white dwarf. I. Discovery of pulsations in PG 0112+104.

HERMES J.J., KAWALER S.D., BISCHOFF-KIM A., PROVENCAL J.L., DUNLAP B.H. and CLEMENS J.C.

Abstract (from CDS):

We present the detection of non-radial oscillations in a hot, helium-atmosphere white dwarf using 78.7 days of nearly uninterrupted photometry from the Kepler space telescope. With an effective temperature >30,000 K, PG 0112+104 becomes the hottest helium-atmosphere white dwarf known to pulsate. The rich oscillation spectrum of low-order g-modes includes clear patterns of rotational splittings from consecutive sequences of dipole and quadrupole modes, which can be used to probe the rotation rate with depth in this highly evolved stellar remnant. We also measure a surface rotation rate of 10.17404 hr from an apparent spot modulation in the K2 data. With two independent measures of rotation, PG 0112+104 provides a remarkable test of asteroseismic inference.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: individual: PG 0112+104 - stars: oscillations including pulsations - stars: variables: general - white dwarfs - white dwarfs

Simbad objects: 5

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Number of rows : 5

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 EGGR 409 WD* 01 14 37.6542285316 +10 41 04.756788413   15.27 15.41 15.69   DB2.5 60 0
2 PG 0122+200 WD* 01 25 22.5118179721 +20 17 56.963251283   16.2   16.9   DOZ.7 102 0
3 V* V471 Tau Al* 03 50 24.9664598642 +17 14 47.433240686   10.258 9.373   8.393 K2V+DA 615 0
4 V* GW Vir WD* 12 01 45.9728868858 -03 45 40.627851273   14.87 15.04     DOQZ1 464 0
5 GD 358 WD* 16 47 18.3926893312 +32 28 32.865420612 12.511 13.530 13.653 13.752 13.852 DB2 316 0

    Equat.    Gal    SGal    Ecl

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2020.10.19-17:39:52

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