Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Pulsating variable stars in the MACHO bulge database: the semiregular variables

Conference ·
OSTI ID:298692

We review the pulsating stars contained in the top 24 fields of the MACHO bulge database, with special emphasis on the red semireg-ular stars. Based on period, amplitude and color cuts, we have selected a sample of 2000 semireguku variables with 15 < P < 100 days. Their period-luminosity relation is studied, as well ss their spatial distribution. We find that they follow the bar, unlike the RR Lyrae in these fields.

Research Organization:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Organization:
USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
298692
Report Number(s):
UCRL-JC--129160; CONF-9708177--; ON: DE98054671; BR: YN0100000; CNN: NSF AST-8809616; NSF AST-9120005
Country of Publication:
United States
Language:
English

Similar Records

MACHO RR lyrae stars in the galactic bulge: the spatial distribution
Conference · Fri Aug 01 00:00:00 EDT 1997 · OSTI ID:634894

The RR Lyrae population of the Galactic bulge from the MACHO database: Mean colors and magnitudes
Journal Article · Wed Dec 31 23:00:00 EST 1997 · Astrophysical Journal · OSTI ID:627543

Bulge Delta Scuti Stars in the MACHO database
Conference · Tue Jul 29 00:00:00 EDT 1997 · OSTI ID:757027