Cookies

We use cookies to ensure that we give you the best experience on our website. You can change your cookie settings at any time. Otherwise, we'll assume you're OK to continue.

Department of Physics

Staff profile

Publication details for Prof Cedric Lacey

Le Delliou, M., Lacey, C. G., Baugh, C. M. & Morris, S. L. (2006). The properties of Ly-alpha emitting galaxies in hierarchical galaxy formation models. Monthly Notices of the Royal Astronomical Society 365(3): 712-726.

Author(s) from Durham

Abstract

We present detailed predictions for the properties of Lyα-emitting galaxies in the framework of the Λ cold dark matter cosmology, calculated using the semi-analytical galaxy formation model GALFORM. We explore a model that assumes a top-heavy initial mass function in starbursts and that has previously been shown to explain the sub-millimetre number counts and the luminosity function of Lyman-break galaxies at high redshift. We show that this model, with the simple assumption that a fixed fraction of Lyα photons escape from each galaxy, is remarkably successful at explaining the observed luminosity function of Lyα emitters (LAEs) over the redshift range 3 < z < 6.6. We also examine the distribution of Lyα equivalent widths and the broad-band continuum magnitudes of emitters, which are in good agreement with the available observations. We look more deeply into the nature of LAEs, presenting predictions for fundamental properties such as the stellar mass and radius of the emitting galaxy and the mass of the host dark matter halo. The model predicts that the clustering of LAEs at high redshifts should be strongly biased relative to the dark matter, in agreement with observational estimates. We also present predictions for the luminosity function of LAEs at z > 7, a redshift range that is starting to be be probed by near-infrared surveys and using new instruments such as the Dark Ages Z Lyman Explorer (DAzLE).

References

Ahn S.-H., 2004, ApJ, 601, L25
Ajiki M. et al., 2003, AJ, 126, 2091
Barton E. J., Dave R., Smith J-D. T., Papovich C., Hernquist L., Springel V.,
2004, ApJ, 604, L1
Baugh C. M., Lacey C. G., Frenk C. S., Granato G. L., Silva L., Bressan A.,
Benson A. J., Cole S., 2005, MNRAS, 356, 1191
Becker R. H. et al., 2001, AJ, 122, 2850
Benson A. J., LaceyC. G., Frenk C. S., Baugh C. M., Cole S., 2002,MNRAS,
333, 156
Benson A. J., Bower R. G., Frenk C. S., Lacey C. G., Baugh C. M., Cole S.,
2003, ApJ, 599, 38
Bower R. G. et al., 2004, MNRAS, 351, 63
Cantalupo S., Porciani C., Lilly S., Miniati F., 2005, ApJ, 628, 61
Charlot S., Fall S. M., 1991, ApJ, 378, 471
Charlot S., Fall S. M., 1993, ApJ, 415, 580
Cole S., Lacey C. G., Baugh C. M., Frenk C. S., 2000, MNRAS, 319, 168
Cowie L. L., Hu E. M., 1998, AJ, 115, 1319
Dawson S. et al., 2004, ApJ, 617, 707
Ellis R., Santos M. R., Kneib J.-P., Kuijken K., 2001, ApJ, 560, L119
Fardal M. A., Katz N., Gardner J., Hernquist L., Weinberg D. H., Dave R.,
2001, ApJ, 562, 605
Furlanetto S. R., Hernquist L., Zaldarriaga M., 2004, MNRAS, 354, 695
Furlanetto S. R., Schaye J., Springel V., Hernquist L., 2005, ApJ, 622, 7
Gnedin N. Y., Prada F., 2004, ApJ, 608, L77
Granato G. L., Lacey C. G., Silva L., Bressan A., Baugh C. M., Cole S.,
Frenk C. S., 2000, ApJ, 542, 710
Haiman Z., 2002, ApJ, 576, L1
Haiman Z., Spaans M., 1999, ApJ, 518, 138
Haiman Z., Spaans M., Quataert E., 2000, ApJ, 537, L5.
Hamana T., Ouchi M., Shimasaku K., Kayo I., Suto Y., 2004, MNRAS, 347,
813
Hansen M., Oh S. P., 2005, MNRAS, submitted (astro-ph/0507586)
Hogan C. J., Weymann R. J., 1987, MNRAS, 225, 1P
Horton A., Parry I. R., Bland-Hawthorn J., Cianci S., King D.,
McMahon R., Medlen S., 2004, in Moorwood A. F. M., Iye M., eds,
Proc. SPIE, Vol. 5492, Ground-based Instrumentation for Astronomy.
The International Society for Optical Engineering, Bellingham, p. 1022
(astro-ph/0409080)
Hu E. M., Cowie L. L., McMahon R. G., 1998, ApJ, 502, L99
Hu E. M., Cowie L. L., Capak P.,McMahon R. G., Hayashino T., Komiyama
Y., 2004, AJ, 127, 563
Kennicutt R. C., 1983, ApJ, 272, 54
Kogut A. et al., 2003, ApJS, 148, 161
Kudritzki R.-P. et al., 2000, ApJ, 536, 19
Kunth D., Mas-Hesse J. M., Terlevich E., Terlevich R., Lequeux J., Fall
S. M., 1998, A&A, 334, 11
Le Delliou M., Lacey C., Baugh C. M., Guiderdoni B., Bacon R., Courtois
H., Sousbie T., Morris S. L., 2005, MNRAS, 357, L11 (Paper I)
McCarthy P. J., Spinrad H., Djorgovski S., Strauss M. A., van Breugel W.,
Liebert J., 1987, ApJ, 319, L39
Madau P., 1995, ApJ, 441, 18
Madau P., Rees M. J., 2000, ApJ, 542, L69
Maier C. et al., 2003, A&A, 402, 79 (CADIS)
Mas-Hesse J. M., Kunth D., Tenorio-Tagle G., Leitherer C., Terlevich R.,
Terlevich E., 2003, ApJ, 598, 858
Matsuda Y. et al., 2004, AJ, 128, 569
Miralda-Escude J., 1998, ApJ, 501, 15
Nagashima M., Lacey C. G., Baugh C. M., Frenk C. S., Cole S., 2005,
MNRAS, 358, 1247
Nagashima M., Lacey C. G., Okamoto T., Baugh C. M., Frenk C. S., Cole
S., 2005, MNRAS, 363, L31
Neufeld D. A., 1991, ApJ, 370, L85
Osterbrock D. E., 1989, Astrophysics of Gaseous Nebulae and Active Galactic
Nuclei. University Science Books, Mill Valley CA
Ouchi M. et al., 2003, ApJ, 582, 60
Ouchi M. et al., 2005, ApJ, 620, L1
Papovich C., Dickinson M., Ferguson H. C., 2001, ApJ, 559, 620
Partridge R. B., Peebles P. J. E., 1967, ApJ, 147, 868
Pascarelle S. M., Windhorst R. A., Keel W. C., 1998, AJ, 116, 2659
Pettini M., Steidel C. C., Adelberger K. L., Dickinson M., Giavalisco M.,
2001, ApJ, 528, 96
Rhoads J. E. et al., 2003, AJ, 125, 1006 (LALA)
Santos M. R., 2004, MNRAS, 349, 1137
Santos M. R., Ellis R. S., Kneib J.-P., Richard J., Kuijken K., 2004, ApJ,
606, 683
Shapley A. E., Steidel C. C., Adelberger K. L., Dickinson M., Giavalisco
M., Pettini M., 2001, ApJ, 562, 95
Shapley A. E., Steidel C. C., Pettini M., Adelberger K. L., 2003, ApJ, 588,
65
Sheth R. H., Mo H. J., Tormen G., 2001, MNRAS, 323, 1
Shimasaku K. et al. 2003, ApJ, 586, L11
Shimasaku K. et al., 2004, ApJ, 605, L93
Stanway E. R., Bunker A. J., McMahon R. G., Ellis R. S., Treu T., McCarthy
P. J., 2004, ApJ, 607, 704
Stark D. P., Ellis R. S., 2005, New Astron. Rev., in press (astro-ph/0508123)
Steidel C. C., Adelberger K. L., Shapley A. E., Pettini M., Dickinson M.,
Giavalisco M., 2000, ApJ, 532, 170
Taniguchi Y. et al., 2005, PASJ, 57, 165
Tenorio-Tagle G., Silich S. A., Kunth D., Terlevich E., Terlevich R., 1999,
MNRAS, 309, 332
Thommes E., Meisenheimer, K., 2005, A&A, 430, 877
Tran K.-V., Lilly S. J., Crampton D., Brodwin M., 2004, ApJ, 612, L89
Willis J. P., Courbin F., 2005, MNRAS, 357, 1348.
Willis J. P., Courbin F., Kneib J.-P., Minniti D., 2005, New Astron. Rev., in
press (astro-ph/0509600)
Wyithe J. S. B., Loeb A., 2005, ApJ, 625, 1.