Observations of new candidate PMS δ Scuti stars

Details Observations of new candidate PMS δ Scuti stars Observations of new candidate PMS δ Scuti stars

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..224..812b&link_type=abstract

The A-Star Puzzle, held in Poprad, Slovakia, July 8-13, 2004. Edited by J. Zverko, J. Ziznovsky, S.J. Adelman, and W.W. Weiss,

Physics

7

Stars: Pre-Main-Sequence, Stars: Oscillations (Including Pulsations), Stars: Variables: Δ Scuti, Stars: Interiors.

Scientific paper

Among variable stars, δ Scuti are particularly interesting since they can pulsate in different evolutionary phases and are characterized by both radial and nonradial pulsation modes. Even if the majority of δ Scuti stars are in their Main Sequence (MS) or post-MS phases, there are growing evidences in the recent years about the presence of δ Scuti variables among stars which are still in their pre-MS phase (the so-called Herbig Ae-stars). Due to the small number of the known class members, the boundaries of Instability Strip are not well constrained. In this context, we present the preliminary results of a long term project to define these limits by enlarging the sample of PMS δ Scuti stars.

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