The Imprint of Cosmic Reionization on the Luminosity Function of Galaxies

被引：52

作者：

Bose, Sownak ^{[1
]}

Deason, Alis J. ^{[2
]}

Frenk, Carlos S. ^{[2
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[2] Univ Durham, Inst Computat Cosmol, South Rd, Durham DH1 3LE, England

来源：

ASTROPHYSICAL JOURNAL | 2018年 / 863卷 / 02期

关键词：

dark ages; reionization; first stars; galaxies: dwarf; galaxies: formation; galaxies: luminosity function; mass function; MILKY-WAY SATELLITE; LY-ALPHA; COPERNICUS COMPLEXIO; SEMIANALYTIC MODEL; LYMAN-ALPHA; HALO MASS; EVOLUTION; POPULATION; PHOTOIONIZATION; REDSHIFT;

D O I：

10.3847/1538-4357/aacbc4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The (re)ionization of hydrogen in the early universe has a profound effect on the formation of the first galaxies: by raising the gas temperature and pressure, it prevents gas from cooling into small halos, thus affecting the abundance of present-day small galaxies. Using the GALFORM semi-analytic model of galaxy formation, we show that two key aspects of the reionization process-when reionization takes place and the characteristic scale below which it suppresses galaxy formation-are imprinted in the luminosity function of dwarf galaxies. We focus on the luminosity function of satellites of galaxies like the Milky Way and the LMC, which is easier to measure than the luminosity function of the dwarf population as a whole. Our results show that the details of these two characteristic properties of reionization determine the shape of the luminosity distribution of satellites in a unique way, and are largely independent of the other details of the galaxy formation model. Our models generically predict a bimodality in the distribution of satellites as a function of luminosity: a population of faint satellites and population of bright satellites separated by a "valley" forged by reionization. We show that this bimodal distribution is present at high statistical significance in the combined satellite luminosity function of the Milky Way and M31. We make predictions for the expected number of satellites around LMC-mass dwarfs where the bimodality may also be measurable in future observational programs. Our preferred model predicts a total of 26 +/- 10 (68% confidence) satellites brighter than M-V = 0 in LMC-mass systems.

引用

页数：13

共 105 条

[1] Planck 2015 results XVII. Constraints on primordial non-Gaussianity [J].

Ade, P. A. R. ;

Aghanim, N. ;

Arnaud, M. ;

Arrojam, F. ;

Ashdown, M. ;

Aumont, J. ;

Baccigalupi, C. ;

Ballardini, M. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartolo, N. ;

Basak, S. ;

Battaner, E. ;

Benabed, K. ;

Benoit, A. ;

Benoit-Levy, A. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bock, J. J. ;

Bonaldi, A. ;

Bonavera, L. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Boulanger, F. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Calabrese, E. ;

Cardoso, J. -F. ;

Catalano, A. ;

Challinor, A. ;

Chamballu, A. ;

Chiang, H. C. ;

Christensen, P. R. ;

Church, S. ;

Clements, D. L. ;

Colombi, S. ;

Colombo, L. P. L. ;

Combet, C. ;

Couchot, F. ;

Coulais, A. ;

Crill, B. P. ;

Curto, A. ;

Cuttaia, F. ;

Danese, L. ;

Davies, R. D. ;

Davis, R. J. ;

de Bernardis, P. .

ASTRONOMY & ASTROPHYSICS, 2016, 594

[2] Planck 2013 results. XVI. Cosmological parameters [J].

Ade, P. A. R. ;

Aghanim, N. ;

Armitage-Caplan, C. ;

Arnaud, M. ;

Ashdown, M. ;

Atrio-Barandela, F. ;

Aumont, J. ;

Baccigalupi, C. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartlett, J. G. ;

Battaner, E. ;

Benabed, K. ;

Benoit, A. ;

Benoit-Levy, A. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bobin, J. ;

Bock, J. J. ;

Bonaldi, A. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Bridges, M. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Calabrese, E. ;

Cappellini, B. ;

Cardoso, J. -F. ;

Catalano, A. ;

Challinor, A. ;

Chamballu, A. ;

Chary, R. -R. ;

Chen, X. ;

Chiang, H. C. ;

Chiang, L. -Y ;

Christensen, P. R. ;

Church, S. ;

Clements, D. L. ;

Colombi, S. ;

Colombo, L. P. L. ;

Couchot, F. ;

Coulais, A. ;

Crill, B. P. ;

Curto, A. ;

Cuttaia, F. ;

Danese, L. ;

Davies, R. D. .

ASTRONOMY & ASTROPHYSICS, 2014, 571

[3] The Fifth Data Release of the Sloan Digital Sky Survey [J].

Adelman-McCarthy, Jennifer K. ;

Agueeros, Marcel A. ;

Allam, Sahar S. ;

Anderson, Kurt S. J. ;

Anderson, Scott F. ;

Annis, James ;

Bahcall, Neta A. ;

Bailer-Jones, Coryn A. L. ;

Baldry, Ivan K. ;

Barentine, J. C. ;

Beers, Timothy C. ;

Belokurov, V. ;

Berlind, Andreas ;

Bernardi, Mariangela ;

Blanton, Michael R. ;

Bochanski, John J. ;

Boroski, William N. ;

Bramich, D. M. ;

Brewington, Howard J. ;

Brinchmann, Jarle ;

Brinkmann, J. ;

Brunner, Robert J. ;

Budavari, Tamas ;

Carey, Larry N. ;

Carliles, Samuel ;

Carr, Michael A. ;

Castander, Francisco J. ;

Connolly, A. J. ;

Cool, R. J. ;

Cunha, Carlos E. ;

Csabai, Istvan ;

Dalcanton, Julianne J. ;

Doi, Mamoru ;

Eisenstein, Daniel J. ;

Evans, Michael L. ;

Evans, N. W. ;

Fan, Xiaohui ;

Finkbeiner, Douglas P. ;

Friedman, Scott D. ;

Frieman, Joshua A. ;

Fukugita, Masataka ;

Gillespie, Bruce ;

Gilmore, G. ;

Glazebrook, Karl ;

Gray, Jim ;

Grebel, Eva K. ;

Gunn, James E. ;

De Haas, Ernst ;

Hall, Patrick B. ;

Harvanek, Michael .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2007, 172 (02) :634-644

[4] NEW LOOK AT STATISTICAL-MODEL IDENTIFICATION [J].

AKAIKE, H .

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 1974, AC19 (06) :716-723

[5] THE ELEVENTH AND TWELFTH DATA RELEASES OF THE SLOAN DIGITAL SKY SURVEY: FINAL DATA FROM SDSS-III [J].

Alam, Shadab ;

Albareti, Franco D. ;

Allende Prieto, Carlos ;

Anders, F. ;

Anderson, Scott F. ;

Anderton, Timothy ;

Andrews, Brett H. ;

Armengaud, Eric ;

Aubourg, Eric ;

Bailey, Stephen ;

Basu, Sarbani ;

Bautista, Julian E. ;

Beaton, Rachael L. ;

Beers, Timothy C. ;

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. ;

Bovy, Jo ;

Bradley, A. Shelden ;

Brandt, W. N. ;

Brauer, D. E. ;

Brinkmann, J. ;

Brown, Peter J. ;

Brownstein, Joel R. ;

Burden, Angela ;

Burtin, Etienne ;

Busca, Nicolas G. ;

Cai, Zheng ;

Capozzi, Diego ;

Rosell, Aurelio Carnero ;

Carr, Michael A. ;

Carrera, Ricardo ;

Chambers, K. C. ;

Chaplin, William James ;

Chen, Yen-Chi ;

Chiappini, Cristina ;

Chojnowski, S. Drew ;

Chuang, Chia-Hsun ;

Clerc, Nicolas ;

Comparat, Johan ;

Covey, Kevin ;

Croft, Rupert A. C. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2015, 219 (01)

[6] CONNECTING REIONIZATION TO THE LOCAL UNIVERSE [J].

Alvarez, Marcelo A. ;

Busha, Michael ;

Abel, Tom ;

Wechsler, Risa H. .

ASTROPHYSICAL JOURNAL LETTERS, 2009, 703 (02) :L167-L171

[7]

[Anonymous], 2016, ARXIV161205560

[8]

[Anonymous], 2015, ARXIV150303757

[9]

[Anonymous], 2019, ASTROPHYS J

[10] A primer on hierarchical galaxy formation: the semi-analytical approach [J].

Baugh, C. M. .

REPORTS ON PROGRESS IN PHYSICS, 2006, 69 (12) :3101-3156

← 1 2 3 4 5 6 7 8 9 10 →