uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Time-resolved photometric and spectroscopic analysis of the luminous Ap star HD 103498
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Observational Astronomy.
Show others and affiliations
2010 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 401, no 2, 1299-1307 p.Article in journal (Refereed) Published
Abstract [en]

We present the results of the photometric and spectroscopic monitoring of the luminous Ap star HD 103498. The time-series photometric observations were carried out on 17 nights using a three-channel fast photometer attached to the 1.04-m optical telescope at the Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital. The photometric data from five nights in 2007 show a clear signature of 15-min periodicity. However, the follow-up observations during 2007-2009 did not reproduce any such periodicity. To confirm the photometric light variations, time-series spectroscopic observations were carried out with the 2.56-m Nordic Optical Telescope (NOT) at La Palma on 2009 February 2. No radial velocity variations were present in this data set, which is in full agreement with the photometric observations taken around the same date. Model atmosphere and abundance analysis of HD 103498 show that the star is evolved from the main sequence and its atmospheric abundances are similar to those of two other evolved Ap stars, HD 133792 and HD 204411: large overabundances of Si, Cr and Fe and moderate overabundances of the rare-earth elements. These chemical properties and a higher effective temperature distinguish HD 103498 from any known roAp star.

Place, publisher, year, edition, pages
2010. Vol. 401, no 2, 1299-1307 p.
Keyword [en]
stars: individual: HD 103498, stars: magnetic fields, stars: oscillations, stars: variables: others
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-137850DOI: 10.1111/j.1365-2966.2009.15725.xISI: 000273317300042OAI: oai:DiVA.org:uu-137850DiVA: diva2:379098
Available from: 2010-12-17 Created: 2010-12-16 Last updated: 2012-10-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Kochukhov, OlegPiskunov, Nikolai
By organisation
Observational Astronomy
In the same journal
Monthly notices of the Royal Astronomical Society
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 482 hits
ReferencesLink to record
Permanent link

Direct link