THE QUENCHING OF THE ULTRA-FAINT DWARF GALAXIES IN THE REIONIZATION ERA

被引：295

作者：

Brown, Thomas M. ^{[1
]}

Tumlinson, Jason ^{[1
]}

Geha, Marla ^{[2
]}

Simon, Joshua D. ^{[3
]}

Vargas, Luis C. ^{[2
]}

VandenBerg, Don A. ^{[4
]}

Kirby, Evan N. ^{[5
]}

Kalirai, Jason S. ^{[1
,6
]}

Avila, Roberto J. ^{[1
]}

Gennaro, Mario ^{[1
]}

Ferguson, Henry C. ^{[1
]}

Munoz, Ricardo R. ^{[7
]}

Guhathakurta, Puragra ^{[8
,9
]}

Renzini, Alvio ^{[10
]}

机构：

[1] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[2] Yale Univ, Dept Astron, New Haven, CT 06520 USA

[3] Carnegie Inst Washington Observ, Pasadena, CA 91101 USA

[4] Univ Victoria, Dept Phys & Astron, STN CSC, Victoria, BC V8W 2Y2, Canada

[5] CALTECH, Pasadena, CA 91125 USA

[6] Johns Hopkins Univ, Ctr Astrophys Sci, Baltimore, MD 21218 USA

[7] Univ Chile, Dept Astron, Santiago, Chile

[8] Univ Calif Santa Cruz, Lick Observ, UCO, Santa Cruz, CA 95064 USA

[9] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA

[10] Osserv Astron Padova, I-35122 Padua, Italy

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 796卷 / 02期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

galaxies: dwarf; galaxies: evolution; galaxies: formation; galaxies: photometry; galaxies: stellar content; Local Group; STAR-FORMATION HISTORY; MILKY-WAY SATELLITE; METAL-POOR STARS; DIGITAL SKY SURVEY; MULTIELEMENT ABUNDANCE MEASUREMENTS; GALACTIC GLOBULAR-CLUSTERS; COLOR-MAGNITUDE DIAGRAM; 1ST SPECTROSCOPIC DATA; URSA-MAJOR; SPHEROIDAL SATELLITE;

D O I：

10.1088/0004-637X/796/2/91

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present new constraints on the star formation histories of six ultra-faint dwarf galaxies: Bootes I, Canes Venatici II, Coma Berenices, Hercules, Leo IV, and Ursa Major I. Our analysis employs a combination of high-precision photometry obtained with the Advanced Camera for Surveys on the Hubble Space Telescope, medium-resolution spectroscopy obtained with the DEep Imaging Multi-Object Spectrograph on the W. M. Keck Observatory, and updated Victoria-Regina isochrones tailored to the abundance patterns appropriate for these galaxies. The data for five of these Milky Way satellites are best fit by a star formation history where at least 75% of the stars formed by z similar to 10 (13.3 Gyr ago). All of the galaxies are consistent with 80% of the stars forming by z similar to 6 (12.8 Gyr ago) and 100% of the stars forming by z similar to 3 (11.6 Gyr ago). The similarly ancient populations of these galaxies support the hypothesis that star formation in the smallest dark-matter sub-halos was suppressed by a global outside influence, such as the reionization of the universe.

引用

页数：13

共 121 条

[1] A photometric and spectroscopic study of the new dwarf spheroidal galaxy in Hercules Metallicity, velocities, and a clean list of RGB members [J].

Aden, D. ;

Feltzing, S. ;

Koch, A. ;

Wilkinson, M. I. ;

Grebel, E. K. ;

Lundstrom, I. ;

Gilmore, G. F. ;

Zucker, D. B. ;

Belokurov, V. ;

Evans, N. W. ;

Faria, D. .

ASTRONOMY & ASTROPHYSICS, 2009, 506 (03) :1147-1168

[2] THE TENTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY: FIRST SPECTROSCOPIC DATA FROM THE SDSS-III APACHE POINT OBSERVATORY GALACTIC EVOLUTION EXPERIMENT [J].

Ahn, Christopher P. ;

Alexandroff, Rachael ;

Allende Prieto, Carlos ;

Anders, Friedrich ;

Anderson, Scott F. ;

Anderton, Timothy ;

Andrews, Brett H. ;

Aubourg, Eric ;

Bailey, Stephen ;

Bastien, Fabienne A. ;

Bautista, Julian E. ;

Beers, Timothy C. ;

Beifiori, Alessandra ;

Bender, Chad F. ;

Berlind, Andreas A. ;

Beutler, Florian ;

Bhardwaj, Vaishali ;

Bird, Jonathan C. ;

Bizyaev, Dmitry ;

Blake, Cullen H. ;

Blanton, Michael R. ;

Blomqvist, Michael ;

Bochanski, John J. ;

Bolton, Adam S. ;

Borde, Arnaud ;

Bovy, Jo ;

Bradley, Alaina Shelden ;

Brandt, W. N. ;

Brauer, Dorothee ;

Brinkmann, J. ;

Brownstein, Joel R. ;

Busca, Nicolas G. ;

Carithers, William ;

Carlberg, Joleen K. ;

Carnero, Aurelio R. ;

Carr, Michael A. ;

Chiappini, Cristina ;

Chojnowski, S. Drew ;

Chuang, Chia-Hsun ;

Comparat, Johan ;

Crepp, Justin R. ;

Cristiani, Stefano ;

Croft, Rupert A. C. ;

Cuesta, Antonio J. ;

Cunha, Katia ;

da Costa, Luiz N. ;

Dawson, Kyle S. ;

De Lee, Nathan ;

Dean, Janice D. R. ;

Delubac, Timothee .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2014, 211 (02)

[3] THE NINTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY: FIRST SPECTROSCOPIC DATA FROM THE SDSS-III BARYON OSCILLATION SPECTROSCOPIC SURVEY [J].

Ahn, Christopher P. ;

Alexandroff, Rachael ;

Prieto, Carlos Allende ;

Anderson, Scott F. ;

Anderton, Timothy ;

Andrews, Brett H. ;

Aubourg, Eric ;

Bailey, Stephen ;

Balbinot, Eduardo ;

Barnes, Rory ;

Bautista, Julian ;

Beers, Timothy C. ;

Beifiori, Alessandra ;

Berlind, Andreas A. ;

Bhardwaj, Vaishali ;

Bizyaev, Dmitry ;

Blake, Cullen H. ;

Blanton, Michael R. ;

Blomqvist, Michael ;

Bochanski, John J. ;

Bolton, Adam S. ;

Borde, Arnaud ;

Bovy, Jo ;

Brandt, W. N. ;

Brinkmann, J. ;

Brown, Peter J. ;

Brownstein, Joel R. ;

Bundy, Kevin ;

Busca, N. G. ;

Carithers, William ;

Carnero, Aurelio R. ;

Carr, Michael A. ;

Casetti-Dinescu, Dana I. ;

Chen, Yanmei ;

Chiappini, Cristina ;

Comparat, Johan ;

Connolly, Natalia ;

Crepp, Justin R. ;

Cristiani, Stefano ;

Croft, Rupert A. C. ;

Cuesta, Antonio J. ;

da Costa, Luiz N. ;

Davenport, James R. A. ;

Dawson, Kyle S. ;

de Putter, Roland ;

De Lee, Nathan ;

Delubac, Timothee ;

Dhital, Saurav ;

Ealet, Anne ;

Ebelke, Garrett L. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2012, 203 (02)

[4] ULTRA-FAINT ULTRAVIOLET GALAXIES AT z ∼ 2 BEHIND THE LENSING CLUSTER A1689: THE LUMINOSITY FUNCTION, DUST EXTINCTION, AND STAR FORMATION RATE DENSITY [J].

Alavi, Anahita ;

Siana, Brian ;

Richard, Johan ;

Stark, Daniel P. ;

Scarlata, Claudia ;

Teplitz, Harry I. ;

Freeman, William R. ;

Dominguez, Alberto ;

Rafelski, Marc ;

Robertson, Brant ;

Kewley, Lisa .

ASTROPHYSICAL JOURNAL, 2014, 780 (02)

[5] An Empirical Pixel-Based Correction for Imperfect CTE. I. HST's Advanced Camera for Surveys [J].

Anderson, Jay ;

Bedin, Luigi R. .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 2010, 122 (895) :1035-1064

[6] The Chemical Composition of the Sun [J].

Asplund, Martin ;

Grevesse, Nicolas ;

Sauval, A. Jacques ;

Scott, Pat .

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, VOL 47, 2009, 47 :481-522

[7] HUBBLE SPACE TELESCOPE GRISM SPECTROSCOPY OF EXTREME STARBURSTS ACROSS COSMIC TIME: THE ROLE OF DWARF GALAXIES IN THE STAR FORMATION HISTORY OF THE UNIVERSE [J].

Atek, Hakim ;

Kneib, Jean-Paul ;

Pacifici, Camilla ;

Malkan, Matthew ;

Charlot, Stephane ;

Lee, Janice ;

Bedregal, Alejandro ;

Bunker, Andrew J. ;

Colbert, James W. ;

Dressler, Alan ;

Hathi, Nimish ;

Lehnert, Matthew ;

Martin, Crystal L. ;

McCarthy, Patrick ;

Rafelski, Marc ;

Ross, Nathaniel ;

Siana, Brian ;

Teplitz, Harry I. .

ASTROPHYSICAL JOURNAL, 2014, 789 (02)

[8] ON DWARF ELLIPTIC GALAXIES AND THE FAINT BLUE COUNTS [J].

BABUL, A ;

REES, MJ .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1992, 255 (02) :346-350

[9] The velocity dispersion and mass-to-light ratio of the remote halo globular cluster NGC 2419 [J].

Baumgardt, H. ;

Cote, P. ;

Hilker, M. ;

Rejkuba, M. ;

Mieske, S. ;

Djorgovski, S. G. ;

Stetson, Peter .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2009, 396 (04) :2051-2060

[10] Cats and dogs, hair and a hero: A quintet of new Milky Way companions [J].

Belokurov, V. ;

Zucker, D. B. ;

Evans, N. W. ;

Kleyna, J. T. ;

Koposov, S. ;

Hodgkin, S. T. ;

Irwin, M. J. ;

Gilmore, G. ;

Wilkinson, M. I. ;

Fellhauer, M. ;

Bramich, D. M. ;

Hewett, P. C. ;

Vidrih, S. ;

De Jong, J. T. A. ;

Smith, J. A. ;

Rix, H. -W. ;

Bell, E. F. ;

Wyse, R. F. G. ;

Newberg, H. J. ;

Mayeur, P. A. ;

Yanny, B. ;

Rockosi, C. M. ;

Gnedin, O. Y. ;

Schneider, D. P. ;

Beers, T. C. ;

Barentine, J. C. ;

Brewington, H. ;

Brinkmann, J. ;

Harvanek, M. ;

Kleinman, S. J. ;

Krzesinski, J. ;

Long, D. ;

Nitta, A. ;

Snedden, S. A. .

ASTROPHYSICAL JOURNAL, 2007, 654 (02) :897-906

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