2006A&A...459..557S


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.10CET02:56:04

2006A&A...459..557S - Astronomy and Astrophysics, volume 459, 557-564 (2006/11-4)

The rapidly pulsating subdwarf B star PG 1325+101. I. Oscillation modes from multisite observations.

SILVOTTI R., BONANNO A., BERNABEI S., FONTAINE G., CHARPINET S., LECCIA S., KJELDSEN H., JANULIS R., FRASCA A., OSTENSEN R., KIM S.-L., PARK B.-G., JIANG X., REED M.D., PATTERSON R.S., GIETZEN K.M., CLARK P.J., WOLF G.W., LIPKIN Y., FORMIGGINI L., LEIBOWITZ E., OSWALT T.D., RUDKIN M., JOHNSTON K., BRASSARD P., CHAYER P., GREEN E.M. and BERGERON P.

Abstract (from CDS):

In this article we present the results of 215h of time-series photometry on the rapidly pulsating subdwarf B star PG 1325+101 (Teff=35000K, logg=5.8, log N(He)/N(H)=-1.7), obtained during 25 days of observation in Spring 2003 from nine different sites. As in previous observations, the temporal spectrum is dominated by the main peak at 7255.55µHz, with an amplitude of about 2.7% which, however, is dropped to about 1.7% in February 2005. No secondary peaks close to the dominant pulsation mode are clearly detected. In addition, at least fourteen more pulsation frequencies are found: three of them at 7704.92, 9380.17 and 14511.10µHz were already present in the discovery run with small differences in frequency, probably due to 1-day aliasing effects. The peak at 7704.92µHz belongs to a triplet of almost equally spaced frequencies that could be due to rotational splitting and would imply a rotational period of about 1.6 days. Based on the results of this article, a detailed asteroseismic analysis of PG 1325+101 is presented in a separate paper (Charpinet et al., 2006A&A...459..565C, Paper II).

Abstract Copyright:

Journal keyword(s): stars: horizontal-branch - stars: oscillations - stars: interiors - stars: individual: PG 1325+101

VizieR on-line data: <Available at CDS (J/A+A/459/557): lcwhole.dat>

Simbad objects: 9

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Number of rows : 9

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 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 V* UY Sex HS* 10 50 02.8264873492 -00 00 36.880346331 12.063 13.184 13.474 13.606 13.769 sdO9VIIHe6 148 0
4 Feige 48 HS* 11 47 14.4977747924 +61 15 31.790488292   13.12 13.28     sdB 108 0
5 PG 1219+534 HS* 12 21 29.0915970330 +53 04 36.796970097   12.41       sdB 78 1
6 PG 1325+102 HS* 13 27 48.5602550889 +09 54 51.048576366   13.73 13.98 14.29   sdBO 52 1
7 V* V361 Hya ** 14 05 33.00 -27 01 34.1   15.45 15.26 15.16   sdB+ 108 0
8 PG 1605+072 HS* 16 08 03.6872880396 +07 04 28.747599362   12.53 12.83 13.18   sdB0.2VIHe3 121 0
9 Balloon 90100001 HS* 23 15 21.4810383697 +29 05 01.429272894   11.90 12.30     sdB 73 0

    Equat.    Gal    SGal    Ecl

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2019.12.10-02:56:04

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