SIMBAD references

2025A&A...694A.246A - Astronomy and Astrophysics, volume 694A246 (2025/2-1)

Searching for new variable white dwarfs: The discovery of the three new pulsating and three new binary systems.

ANTUNES AMARAL L., VUCKOVIC M., PELISOLI I., ISTRATE A., KEPLER S.O. and HIBBERT J.M.

Abstract (from CDS):

In recent years, approximately 150 low-mass white dwarfs (WDs), typically with masses below 0.4 M_⊙, have been discovered. Observational evidence indicates that most of these low-mass WDs are in binary systems, supporting binary evolution scenarios as their primary formation pathway. A few extremely low-mass (ELM) WDs in this population have also been found to be pulsationally variable. In this work we present a comprehensive analysis aimed at identifying new variable low-mass WDs. From our candidate selection, 16 objects were identified as being within the ZZ Ceti instability strip. Those objects were observed over multiple nights using high-speed photometry from the SOAR/Goodman and SMARTS-1 m telescopes. Our analysis led to the discovery of three new pulsating WDs: one pulsating ELM WD, one low-mass WD, and one ZZ Ceti star. Additionally, we identified three objects in binary systems, two with ellipsoidal variations in their light curves (one of which is likely a pre-ELM star) and a third that shows a reflection effect.

Abstract Copyright: © The Authors 2025

Journal keyword(s): binaries: general - stars: low-mass - stars: oscillations - white dwarfs

CDS comments: Throughout the article : SDSS J040600.99-542751.7 (GALEX J040600.9-542751), J083013.72-100356.0 (GALEX J083013.7-100356), J083417.21–652423.2 (GALEX J083417.2-652422), J090901.01-454637.0 (DENIS J090901.0-454637), J134619.11-135026.7 (EC 13436-1335), J151626.39-265836.9 (GALEX J151626.3-265836), J183245.52+141311.2 (GALEX J183245.5+141312), and J183702.03-674141.1 (2MASS J18370199-6741412), are erroneous identifiers; these stars are not in any SDSS survey from DR3 to DR16.

Simbad objects: 18

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