Detection of photospheric X-ray pulsations from PG 1159-035 with EXOSAT

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/184697· OSTI ID:7259555

Barstow, M A; Holberg, J B; Grauer, A D; Winget, D E

The detection of soft X-ray pulsations from the hot, helium-rich, degenerate object, PG 1159-035 is reported. These observations, obtained with the Low Energy experiment on EXOSAT, show the presence of large-amplitude soft X-ray (44-150 A) pulsations analogous to several of the low-amplitude, nonradial, g-mode pulsations which are observed in the optical. These soft X-ray pulsations, with periods of 516 s, 524 s, and 539 s, arise from the photosphere of PG 1159-035 and constitute the first observations of stellar atmospheric pulsational phenomena in the X-ray band. 10 references.

• Research Organization: Leicester Univ., England; Arizona Univ., Tucson; Arkansas Univ., Little Rock; Texas Univ., Austin
• OSTI ID: 7259555
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 306; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640103 -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ATMOSPHERES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
DWARF STARS
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUIDS
GASES
HELIUM
IONIZING RADIATIONS
NONMETALS
OSCILLATIONS
PULSATIONS
RADIATIONS
RARE GASES
SOFT X RADIATION
SPECTRA
STAR EVOLUTION
STARS
STELLAR ATMOSPHERES
WHITE DWARF STARS
X RADIATION