2025AJ....169..339P

Query : 2025AJ....169..339P

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

goto Full paper

goto View the references in ADS

Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
2 NAME Car Arm PoG 10 00 -60.0           ~ 471 1
3 UCAC4 141-049067 HS? 10 39 58.0559943528 -61 57 32.059938924   14.207 14.158 14.537 14.522 ~ 4 0
4 GALEX J172411.8-632146 HS? 17 24 11.7018860184 -63 21 47.457930960           ~ 4 0
5 NAME Galactic Bulge reg ~ ~           ~ 4794 0

To bookmark this query, right click on this link: simbad:objects in 2025AJ....169..339P and select 'bookmark this link' or equivalent in the popup menu