A puzzle involving galactic bulge microlensing events
dc.contributor.author | Cohen, Judith G | |
dc.contributor.author | Gould, A | |
dc.contributor.author | Thompson, Ian | |
dc.contributor.author | Feltzing, Sofia | |
dc.contributor.author | Bensby, T | |
dc.contributor.author | Johnson, Jennifer A | |
dc.contributor.author | Huang, Wenjin | |
dc.contributor.author | Melendez, Jorge | |
dc.contributor.author | Lucatello, Sara | |
dc.contributor.author | Asplund, Martin | |
dc.date.accessioned | 2015-12-13T22:43:21Z | |
dc.date.issued | 2010 | |
dc.date.updated | 2016-02-24T09:36:25Z | |
dc.description.abstract | We study a sample of 16 microlensed Galactic bulge main-sequence turnoff region stars for which high-dispersion spectra have been obtained with detailed abundance analyses. We demonstrate that there is a very strong and highly statistically significant correlation between the maximum magnification of the microlensed bulge star and the value of the [Fe/H] deduced from the high resolution spectrum of each object. Physics demands that this correlation, assuming it to be real, be the result of some sample bias. We suggest several possible explanations, but are forced to reject them all, and are left puzzled. To obtain a reliable metallicity distribution in the Galactic bulge based on microlensed dwarf stars, it will be necessary to resolve this issue through the course of additional observations. | |
dc.identifier.issn | 2041-8205 | |
dc.identifier.uri | http://hdl.handle.net/1885/79170 | |
dc.publisher | Institute of Physics Publishing Ltd. | |
dc.source | Astrophysical Journal Letters | |
dc.subject | Keywords: Galaxy: bulge; Gravitational lensing: micro; Stars: abundances | |
dc.title | A puzzle involving galactic bulge microlensing events | |
dc.type | Journal article | |
local.bibliographicCitation.issue | 1 (PART 2) | |
local.bibliographicCitation.lastpage | L52 | |
local.bibliographicCitation.startpage | L48 | |
local.contributor.affiliation | Cohen, Judith G, California Institute of Technology | |
local.contributor.affiliation | Gould, A, Ohio State University | |
local.contributor.affiliation | Thompson, Ian, Observatories of the Carnegie Institution of Washington | |
local.contributor.affiliation | Feltzing, Sofia, Lund Observatory | |
local.contributor.affiliation | Bensby, T, European Southern Observatory | |
local.contributor.affiliation | Johnson, Jennifer A, Ohio State University | |
local.contributor.affiliation | Huang, Wenjin, University of Washington | |
local.contributor.affiliation | Melendez, Jorge, Centro de Astrofisica da Universidade do Porto | |
local.contributor.affiliation | Lucatello, Sara, INAF, Osservatorio Astronomico di Padova | |
local.contributor.affiliation | Asplund, Martin, College of Physical and Mathematical Sciences, ANU | |
local.contributor.authoremail | u4042723@anu.edu.au | |
local.contributor.authoruid | Asplund, Martin, u4042723 | |
local.description.embargo | 2037-12-31 | |
local.description.notes | Imported from ARIES | |
local.identifier.absfor | 020104 - Galactic Astronomy | |
local.identifier.ariespublication | f5625xPUB7672 | |
local.identifier.citationvolume | 711 | |
local.identifier.doi | 10.1088/2041-8205/711/1/L48 | |
local.identifier.scopusID | 2-s2.0-77949519341 | |
local.identifier.thomsonID | 000275361700010 | |
local.identifier.uidSubmittedBy | f5625 | |
local.type.status | Published Version |
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