4 papers · 1 filter
Variability of Central Stars of Planetary Nebulae with the Zwicky Transient Facility. II. Long-Timescale Variables including Wide Binary and Late Thermal Pulse Candidates
Soumyadeep Bhattacharjee, Nicole Reindl, Howard E. Bond +14
In this second paper on our variability survey of central stars of planetary nebulae (CSPNe) using ZTF, we report 11 long-timescale variables with variability timescales ranging fr…
An Extremely Hot Pulsating Pre-White Dwarf from OGLE
P. Pietrukowicz, K. Werner, M. J. Mroz +1
We show that the blue 18.3-minute variable object discovered in the Galactic disk by the OGLE-III survey and named OGLE-GD-WD-0001 is a pulsating pre-white dwarf of PG 1159 spectra…
Variability of Central Stars of Planetary Nebulae with the Zwicky Transient Facility. I. Methods, Short-Timescale Variables, Binary Candidates, and the Unusual Nucleus of WeSb 1
Soumyadeep Bhattacharjee, S. R. Kulkarni, Albert K. H. Kong +16
Over the past several decades, time-series photometry of CSPNe has yielded significant results including, but not limited to, discoveries of nearly 100 binary systems, insights int…
Ultraviolet spectroscopy of the supernova Ia hypervelocity runaway white dwarf J0927-6335
Klaus Werner, Kareem El-Badry, Boris T. Gänsicke +1
The hot white dwarf (WD) J0927-6335 (Gaia DR3 5250394728194220800, effective temperature T = 60,000 K, surface gravity log g = 7) was detected as the fastest known Gala…