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Title: The MACHO Project LMC variable star inventory: Aperiodic blue variables

Abstract

The MACHO Project database was searched for aperiodic blue variables in the LMC. Of approximately 250,000 bright blue stars in the region of observation, around 3,500 had been flagged as variables or as rejected gravitational microlensing candidates from a visual inspection of this set, about 400 stars were selected for the catalog. These stars have been categorized by their light curve morphology. Their spatial distribution is presented and correlated with known phenomena. Analysis of the catalog stars has produced some interesting discoveries. Among some of these variables, unusual color changes were found. Some stars become redder or do not change color when their brightness increases, whereas most stars become bluer if they rapidly brighten. For some stars with relatively long quiescent stages, the light curves were searched for low-level, periodic variability, but no conclusive evidence for such behavior was found.

Authors:
 [1]
  1. Bryn Mawr Coll., PA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
195743
Report Number(s):
UCRL-ID-122897
ON: DE96006101; TRN: AHC29605%%119
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 13 Dec 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; MAGELLANIC CLOUDS; VARIABLE STARS; SPATIAL DISTRIBUTION; COLOR; GRAVITATIONAL LENSES; CLASSIFICATION

Citation Formats

Purdue, P, and Lawrence Livermore National Lab., CA. The MACHO Project LMC variable star inventory: Aperiodic blue variables. United States: N. p., 1995. Web. doi:10.2172/195743.
Purdue, P, & Lawrence Livermore National Lab., CA. The MACHO Project LMC variable star inventory: Aperiodic blue variables. United States. https://doi.org/10.2172/195743
Purdue, P, and Lawrence Livermore National Lab., CA. 1995. "The MACHO Project LMC variable star inventory: Aperiodic blue variables". United States. https://doi.org/10.2172/195743. https://www.osti.gov/servlets/purl/195743.
@article{osti_195743,
title = {The MACHO Project LMC variable star inventory: Aperiodic blue variables},
author = {Purdue, P and Lawrence Livermore National Lab., CA},
abstractNote = {The MACHO Project database was searched for aperiodic blue variables in the LMC. Of approximately 250,000 bright blue stars in the region of observation, around 3,500 had been flagged as variables or as rejected gravitational microlensing candidates from a visual inspection of this set, about 400 stars were selected for the catalog. These stars have been categorized by their light curve morphology. Their spatial distribution is presented and correlated with known phenomena. Analysis of the catalog stars has produced some interesting discoveries. Among some of these variables, unusual color changes were found. Some stars become redder or do not change color when their brightness increases, whereas most stars become bluer if they rapidly brighten. For some stars with relatively long quiescent stages, the light curves were searched for low-level, periodic variability, but no conclusive evidence for such behavior was found.},
doi = {10.2172/195743},
url = {https://www.osti.gov/biblio/195743}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Dec 13 00:00:00 EST 1995},
month = {Wed Dec 13 00:00:00 EST 1995}
}