Recent developments in the study of long-period variable subdwarf B stars

Suzanna K. Randall; Gilles Fontaine; Elizabeth M. Green; Pierre Brassard; Donald M. Terndrup

Recent developments in the study of long-period variable subdwarf B stars

Suzanna K. Randall, Gilles Fontaine, Elizabeth M. Green, Pierre Brassard, Donald M. Terndrup

Steward Observatory

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

We report on recent advances in the study of long-period variable subdwarf B stars. Two such objects, PG 1627+017 and PG 1338+481, were the targets of extensive multi-site campaigns conducted in 2003 and 2004 respectively. The photometry accumulated yielded up to 23 periodicities in the 4500-9000 s range for the former star and at least 4 convincing periods between 3500 and 4500 s for the latter. The band of periods observed is in qualititive agreement with theoretical predictions for both targets. In the case of PG 1338+481, we obtained multi-colour photometry of sufficient quality to constrain the observed modes' degree indices. Preliminary analysis suggests l=4 for all four modes, again in accordance with theory.

Original language	English (US)
Pages (from-to)	119-124
Number of pages	6
Journal	European Space Agency, (Special Publication) ESA SP
Issue number	559
State	Published - 2004
Event	SOHO 14/GONG 2004 Workshop - Helio- and Asteroseismology: Towards a Golden Future - New Haven, CT, United States Duration: Jul 12 2004 → Jul 16 2004

Keywords

Stars:oscillations
Subdwarfs

ASJC Scopus subject areas

Aerospace Engineering
Space and Planetary Science

Cite this

@article{8b3377c956f24276ae8fc81326e0d92c,

title = "Recent developments in the study of long-period variable subdwarf B stars",

abstract = "We report on recent advances in the study of long-period variable subdwarf B stars. Two such objects, PG 1627+017 and PG 1338+481, were the targets of extensive multi-site campaigns conducted in 2003 and 2004 respectively. The photometry accumulated yielded up to 23 periodicities in the 4500-9000 s range for the former star and at least 4 convincing periods between 3500 and 4500 s for the latter. The band of periods observed is in qualititive agreement with theoretical predictions for both targets. In the case of PG 1338+481, we obtained multi-colour photometry of sufficient quality to constrain the observed modes' degree indices. Preliminary analysis suggests l=4 for all four modes, again in accordance with theory.",

keywords = "Stars:oscillations, Subdwarfs",

author = "Randall, {Suzanna K.} and Gilles Fontaine and Green, {Elizabeth M.} and Pierre Brassard and Terndrup, {Donald M.}",

year = "2004",

language = "English (US)",

pages = "119--124",

journal = "European Space Agency, (Special Publication) ESA SP",

issn = "0379-6566",

publisher = "European Space Agency",

number = "559",

note = "SOHO 14/GONG 2004 Workshop - Helio- and Asteroseismology: Towards a Golden Future ; Conference date: 12-07-2004 Through 16-07-2004",

}

TY - JOUR

T1 - Recent developments in the study of long-period variable subdwarf B stars

AU - Randall, Suzanna K.

AU - Fontaine, Gilles

AU - Green, Elizabeth M.

AU - Brassard, Pierre

AU - Terndrup, Donald M.

PY - 2004

Y1 - 2004

N2 - We report on recent advances in the study of long-period variable subdwarf B stars. Two such objects, PG 1627+017 and PG 1338+481, were the targets of extensive multi-site campaigns conducted in 2003 and 2004 respectively. The photometry accumulated yielded up to 23 periodicities in the 4500-9000 s range for the former star and at least 4 convincing periods between 3500 and 4500 s for the latter. The band of periods observed is in qualititive agreement with theoretical predictions for both targets. In the case of PG 1338+481, we obtained multi-colour photometry of sufficient quality to constrain the observed modes' degree indices. Preliminary analysis suggests l=4 for all four modes, again in accordance with theory.

AB - We report on recent advances in the study of long-period variable subdwarf B stars. Two such objects, PG 1627+017 and PG 1338+481, were the targets of extensive multi-site campaigns conducted in 2003 and 2004 respectively. The photometry accumulated yielded up to 23 periodicities in the 4500-9000 s range for the former star and at least 4 convincing periods between 3500 and 4500 s for the latter. The band of periods observed is in qualititive agreement with theoretical predictions for both targets. In the case of PG 1338+481, we obtained multi-colour photometry of sufficient quality to constrain the observed modes' degree indices. Preliminary analysis suggests l=4 for all four modes, again in accordance with theory.

KW - Stars:oscillations

KW - Subdwarfs

UR - http://www.scopus.com/inward/record.url?scp=22144456022&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=22144456022&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:22144456022

SN - 0379-6566

SP - 119

EP - 124

JO - European Space Agency, (Special Publication) ESA SP

JF - European Space Agency, (Special Publication) ESA SP

IS - 559

T2 - SOHO 14/GONG 2004 Workshop - Helio- and Asteroseismology: Towards a Golden Future

Y2 - 12 July 2004 through 16 July 2004

ER -

Recent developments in the study of long-period variable subdwarf B stars

Abstract

Keywords

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this