Multi-season photometry of the newly-discovered roap star hd75445

C. A. Engelbrecht, F. A.M. Frescura, B. S. Frank, P. R. Nicol

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

HD75445 was recently announced by Kochukhov et al. (2009) to be a low-amplitude roAp star, based on spectroscopic measurements. We present putative pulsation frequencies of HD75445 determined from 22 hours of Johnson B photometry obtained in 2008, 2009 and 2010. We present the first photometric periodicities detected in this star.We make a marginal detection of one of Kochukhov et al. (2009)'s spectroscopic periods, along with a range of confidently detected periodicities covering the low-frequency end of the roAp instability spectrum and the high-frequency end of the Delta Scuti instability spectrum.

Original languageEnglish
Title of host publicationAstrophysical Dynamics
Subtitle of host publicationFrom Stars to Galaxies
PublisherCambridge University Press
Pages377-378
Number of pages2
EditionS271
ISBN (Print)9780521197397
DOIs
Publication statusPublished - Jun 2010

Publication series

NameProceedings of the International Astronomical Union
NumberS271
Volume6
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221

Keywords

  • Delta Scuti
  • Stars: HD75445
  • Stars: variables: RoAp

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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