2005A&A...440..667O


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.03CET17:53:48

2005A&A...440..667O - Astronomy and Astrophysics, volume 440, 667-674 (2005/9-3)

The MultiSite Spectroscopic Telescope campaign: 2 m spectroscopy of the V361 Hya variable PG 1605+072.

O'TOOLE S.J., HEBER U., JEFFERY C.S., DREIZLER S., SCHUH S.L., WOOLF V.M., FALTER S., GREEN E.M., FOR B.-Q., HYDE E.A., KJELDSEN H., MAUCH T. and WHITE B.A.

Abstract (from CDS):

We present results and analysis for the 2m spectroscopic part of the MultiSite Spectroscopic Telescope (MSST) campaign undertaken in May/June 2002. The goal of the project was to observe the pulsating subdwarf B star PG 1605+072 simultaneously in velocity and photometry and to resolve as many of the >50 known modes as possible, which will allow a detailed asteroseismological analysis. We have obtained over 150h of spectroscopy, leading to an unprecedented noise level of only 207m/s. We report here the detection of 20 frequencies in velocity, with two more likely just below our detection threshold. In particular, we detect 6 linear combinations, making PG 1605+072 only the second star known to show such frequencies in velocity. We investigate the phases of these combinations and their parent modes and find relationships between them that cannot be easily understood based on current theory. These observations, when combined with our simultaneous photometry, should allow asteroseismology of this most complicated of sdB pulsators.

Abstract Copyright:

Journal keyword(s): stars: individual: PG 1605+072 - stars: oscillations

Simbad objects: 8

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Number of rows : 8

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 PG 0014+068 HS* 00 16 54.2524890907 +07 04 30.045980038   15.3       sdO 68 1
2 V* EO Cet HS* 01 23 43.2472884132 -05 05 45.831031643   12.21 12.65     sdOV+F4V 57 0
3 PG 1325+102 HS* 13 27 48.5602550889 +09 54 51.048576366   13.73 13.98 14.29   sdBO 53 1
4 V* NY Vir HS* 13 38 48.1466489725 -02 01 49.209465866   13.43 13.66 13.75   sdB1VIIHe1 194 1
5 PG 1605+072 HS* 16 08 03.6872880396 +07 04 28.747599362   12.53 12.83 13.18   sdB0.2VIHe3 122 0
6 KPD 1930+2752 HS* 19 32 14.8086352823 +27 58 35.444970697 12.80 13.75 13.82     sdB 145 0
7 KPD 2109+4401 HS* 21 11 47.6446188582 +44 13 50.621291301 12.14 13.11 13.30 13.64   sdB 62 0
8 V* ZZ Psc WD* 23 28 47.6364608228 +05 14 54.234982405   13.17   13.0   DA4.1 443 0

    Equat.    Gal    SGal    Ecl

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2020.12.03-17:53:48

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