RR lyrae in front of the LMC; implications for microlensing Metadata

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Title

  • Main Title RR lyrae in front of the LMC; implications for microlensing

Creator

  • Author: Minniti, D.
    Creator Type: Personal
  • Author: Aleves, D. A.
    Creator Type: Personal
  • Author: Alcock, C.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy. Office of Financial Management and Controller.
    Contributor Type: Organization
    Contributor Info: USDOE Office of Financial Management and Controller, Washington, DC (United States)

Publisher

  • Name: Lawrence Livermore National Laboratory
    Place of Publication: California
    Additional Info: Lawrence Livermore National Lab., CA (United States)

Date

  • Creation: 1997-04-01

Language

  • English

Description

  • Content Description: The recent suggestion that the microlensing events observed towards the Large Magellanic Cloud are due to an intervening Sgr-like dwarf galaxy is examined. A search for foreground RR Lyrae in the MACHO photometry database yields 20 stars whose distance distribution is not concentrated, and follows the expected halo density profile. Cepheid and red giant branch clump stars in the MACHO database are consistent with membership in the LMC. Since (equal to or less than) 0.3 percent of the RR Lyrae and Cepheids are in the foreground, we conclude that the observed microlensing optical depth is not due to an intervening dwarf galaxy.
  • Physical Description: 6 p.

Subject

  • Keyword: Magellanic Clouds
  • Keyword: Variable Stars
  • Keyword: Galaxies
  • Keyword: Gravitational Lenses
  • STI Subject Categories: 66 Physics
  • Keyword: Star Clusters

Source

  • Conference: International Astronomical Union symposium 184: central regions of the galaxy and galaxies, Kyoto (Japan), 18-22 Aug 1997

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Other: DE98057432
  • Report No.: UCRL-JC--128953
  • Report No.: CONF-9708178--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 293412
  • Archival Resource Key: ark:/67531/metadc684393

Note

  • Display Note: OSTI as DE98057432
  • Display Note: Other: FDE: PDF; PL:
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