The MACHO Project LMC variable star inventory: Aperiodic blue variables

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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 ... continued below

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12 p.

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Purdue, P. December 13, 1995.

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Description

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.

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12 p.

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OSTI as DE96006101

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  • Other Information: PBD: 13 Dec 1995

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  • Other: DE96006101
  • Report No.: UCRL-ID--122897
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/195743 | External Link
  • Office of Scientific & Technical Information Report Number: 195743
  • Archival Resource Key: ark:/67531/metadc671532

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  • December 13, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Feb. 17, 2016, 2:11 p.m.

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Purdue, P. The MACHO Project LMC variable star inventory: Aperiodic blue variables, report, December 13, 1995; California. (https://digital.library.unt.edu/ark:/67531/metadc671532/: accessed August 17, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.