δ Scuti stars in praesepe. II. The STACC 1998 campaign - The spectroscopy

Autor(en)

T H Dall, Søren Frandsen, Holger Lehmann, G C Anupama, E Kambe, Gerald Handler, S Kawanomoto, E Watanabe, M Fukata, T Nagae, S Horner

Abstrakt

We present the results of a large international spectroscopic campaign on the δ Scuti star BN Cnc. Combining observations from five observatories taken over more than two weeks, we calculate line indices of the Hα line. A line index is the integrated line flux in a software filter divided by the continuum flux. We demonstrate that this can be used in combination with simultaneous photometry to classify the oscillation modes. We recover all the frequencies also found from photometry and assign likely mode identifications, which differ slightly from previously published values, but are found to be consistent with simple models. The difference in identification is found to have very little effect on the derived luminosity and temperature.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

European Southern Observatory (Germany), Aarhus University, Thüringer Landessternwarte Tautenburg, Kidwai Memorial Institute of Oncology India, National Defense Academy of Japan, National Astronomical Observatory of Japan, Kobe University, Lockheed Martin

Journal

Astronomy & Astrophysics

Band

385

Seiten

921-931

Anzahl der Seiten

11

ISSN

0004-6361

Publikationsdatum

2002

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/-scuti-stars-in-praesepe-ii-the-stacc-1998-campaign--the-spectroscopy(d3a0f08d-9802-47e8-89fd-673d15457a4c).html