The MACHO Project LMC Variable Star Inventory. VIII. The Recent Star Formation History of the Large Magellanic Cloud from the Cepheid Period Distribution
Alcock, Charles; Allsman, Robyn; Alves, David R; Axelrod, Tim; Becker, Andrew C; Bennett, D P; Bersier, D.; Cook, Kem H; Freeman, Kenneth; Griest, K; Guern, J; Lehner, M J; Marshall, S L; Minniti, Dante; Peterson, Bruce; Pratt, M; Quinn, Peter J; Rodgers, Alexander; Stubbs, C W; Sutherland, William J; Tomaney, A B
Description
We present an analysis of the period distribution of about 1800 Cepheids in the LMC, based on data obtained by the MACHO microlensing experiment and on a previous catalog by C. H. Payne Gaposchkin. Using stellar evolution and pulsation models, we construct theoretical period-frequency distributions that are compared with the observations. These models reveal that a significant burst of star formation has occurred recently in the LMC (∼1.15 × 108 yr). We also show that during the last ∼ 108 yr,...[Show more]
dc.contributor.author | Alcock, Charles | |
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dc.contributor.author | Allsman, Robyn | |
dc.contributor.author | Alves, David R | |
dc.contributor.author | Axelrod, Tim | |
dc.contributor.author | Becker, Andrew C | |
dc.contributor.author | Bennett, D P | |
dc.contributor.author | Bersier, D. | |
dc.contributor.author | Cook, Kem H | |
dc.contributor.author | Freeman, Kenneth | |
dc.contributor.author | Griest, K | |
dc.contributor.author | Guern, J | |
dc.contributor.author | Lehner, M J | |
dc.contributor.author | Marshall, S L | |
dc.contributor.author | Minniti, Dante | |
dc.contributor.author | Peterson, Bruce | |
dc.contributor.author | Pratt, M | |
dc.contributor.author | Quinn, Peter J | |
dc.contributor.author | Rodgers, Alexander | |
dc.contributor.author | Stubbs, C W | |
dc.contributor.author | Sutherland, William J | |
dc.contributor.author | Tomaney, A B | |
dc.date.accessioned | 2015-12-13T23:23:09Z | |
dc.date.available | 2015-12-13T23:23:09Z | |
dc.identifier.issn | 0004-6256 | |
dc.identifier.uri | http://hdl.handle.net/1885/91785 | |
dc.description.abstract | We present an analysis of the period distribution of about 1800 Cepheids in the LMC, based on data obtained by the MACHO microlensing experiment and on a previous catalog by C. H. Payne Gaposchkin. Using stellar evolution and pulsation models, we construct theoretical period-frequency distributions that are compared with the observations. These models reveal that a significant burst of star formation has occurred recently in the LMC (∼1.15 × 108 yr). We also show that during the last ∼ 108 yr, the main center of star formation has been propagating from southeast to northwest along the bar. We find that the evolutionary masses of Cepheids are still smaller than pulsation masses by ∼7% and that the red edge of the Cepheid instability strip could be slightly bluer than indicated by theory. There are approximately 600 Cepheids with periods below ∼2.5 days that cannot be explained by evolution theory. We suggest that they are anomalous Cepheids and that a number of these stars are double-mode Cepheids. | |
dc.publisher | University of Chicago Press | |
dc.source | Astronomical Journal | |
dc.subject | Keywords: Cepheids; Magellanic clouds; Stars: formation | |
dc.title | The MACHO Project LMC Variable Star Inventory. VIII. The Recent Star Formation History of the Large Magellanic Cloud from the Cepheid Period Distribution | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.description.refereed | Yes | |
local.identifier.citationvolume | 117 | |
dc.date.issued | 1999 | |
local.identifier.absfor | 020110 - Stellar Astronomy and Planetary Systems | |
local.identifier.ariespublication | MigratedxPub22652 | |
local.type.status | Published Version | |
local.contributor.affiliation | Alcock, Charles, Lawrence Livermore National Laboratory | |
local.contributor.affiliation | Allsman, Robyn, Administrative Division, ANU | |
local.contributor.affiliation | Alves, David R, Space Telescope Science Institute | |
local.contributor.affiliation | Axelrod, Tim, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Becker, Andrew C, University of Washington | |
local.contributor.affiliation | Bennett, D P, University of Notre Dame | |
local.contributor.affiliation | Bersier, D., Harvard-Smithsonian Center for Astrophysics | |
local.contributor.affiliation | Cook, Kem H, Lawrence Livermore National Laboratory | |
local.contributor.affiliation | Freeman, Kenneth, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Griest, K, University of California | |
local.contributor.affiliation | Guern, J, University of California | |
local.contributor.affiliation | Lehner, M J, University of Pennsylvania | |
local.contributor.affiliation | Marshall, S L, Kavli Institute for Particle Astrophysics and Cosmology/Stanford University | |
local.contributor.affiliation | Minniti, Dante, Lawrence Livermore National Laboratory | |
local.contributor.affiliation | Peterson, Bruce, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Pratt, M, LIGO Massachusetts Institute of Technology | |
local.contributor.affiliation | Quinn, Peter J, European Southern Observatory | |
local.contributor.affiliation | Rodgers, Alexander, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Stubbs, C W, University of Washington | |
local.contributor.affiliation | Sutherland, William J, University of Cambridge | |
local.contributor.affiliation | Tomaney, A B, University of Washington | |
local.bibliographicCitation.startpage | 920 | |
local.bibliographicCitation.lastpage | 926 | |
dc.date.updated | 2015-12-12T09:14:17Z | |
local.identifier.scopusID | 2-s2.0-0039938831 | |
Collections | ANU Research Publications |
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