SIMBAD references

2025AJ....169..339P - Astron. J., 169, 339 (2025/June-0)

An Extremely Hot Pulsating Prewhite Dwarf from OGLE.

PIETRUKOWICZ P., WERNER K., MROZ M.J. and RATAJCZAK M.

Abstract (from CDS):

We show that the blue 18.3 minutes variable object discovered in the Galactic disk by the OGLE-III survey and named OGLE-GD-WD-0001 is a pulsating prewhite dwarf of PG 1159 spectral type. With an effective temperature of about 160,000 K it is among the hottest known pulsators being located close to the blue edge of the GW Virginis instability strip. The long-term OGLE observations indicate that the object has a positive period change rate of about 5 × 10–10 s s–1 and thus already contracts. There are no traces of a planetary nebula around this star.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Sky surveys - White dwarf stars - Fundamental parameters of stars - Pulsating variable stars

Simbad objects: 5

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