The nature of the Delta Scuti star DY Peg

Details The nature of the Delta Scuti star DY Peg The nature of the Delta Scuti star DY Peg

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...166..211p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 166, no. 1-2, Sept. 1986, p. 211-215.

Astronomy and Astrophysics

Astrophysics

7

Stellar Oscillations, Variable Stars, Stellar Evolution, White Dwarf Stars

Scientific paper

An analysis of a complete list of the times of maximum light of DY Peg that exists in the literature has been carried out. With 681 times of maximum light covering a time span of 46 yr, the following ephemeris was deduced: Tmax = 2437178.3729 + 0.07292633 E - 2.20×10-13E2 which implies a period variation of dlnP/dt = -3.020×10-8yr-1. A direct comparison with the models suggests that this star is in the stage of a pre-white-dwarf of 0.2 M_sun; as suggested by the theoretical models of Dziembowski and Kozlowski (1974).

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