Publication: Velocity Dispersions and Stellar Populations of the Most Compact and Msssive early-Type Galaxies at Redshift similar to 1
Loading...
Official URL
Full text at PDC
Publication Date
2011-09-10
Authors
Martínez Manso, Jesús
Guzmán, Rafael
Barro, Guillermo
Cenarro, Javier
Trujillo, Ignacio
Balcells, Marc
Hempel, Angela
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Publishing
Citations
Exportar
Abstract
We present Gran-Telescopio-Canarias/OSIRIS optical spectra of four of the most compact and massive early-type galaxies (ETGs) in the Groth Strip Survey at redshift z similar to 1, with effective radii R-e = 0.5-2.4 kpc and photometric stellarmasses M-star = (1.2-4) x 10(11)M(circle dot). We find that these galaxies have velocity dispersions sigma = 156-236 km s(-1). The spectra are well fitted by single stellar population models with approximately 1 Gyr of age and solar metallicity. We find that (1) the dynamical masses of these galaxies are systematically smaller by a factor of similar to 6 than the published stellarmasses using BRIJK photometry, and (2) when estimating stellarmasses as 0.7xM(dyn), a combination of passive luminosity fading with mass/size growth due to minor mergers can plausibly evolve our objects to match the properties of the local population of ETGs.
Description
© 2011 The American Astronomical Society. This wor0k is partially funded by the Spanish MICINN under the Consolider-Ingenio 2010 Program grant CSD2006-00070: First Science with the GTC. J. M. M. acknowledges funding from a Graduate Alumni Fellowship at the University of Florida. The Spanish MICINN provides support to M. B., M. P., and A. H. through grant AYA2009-11137 and to J. G. through grant AYA2009-10368. Our observations were made with the GTC Telescope at the Spanish Observatorio del Roque de los Muchachos, which is managed by the Instituto de Astrofísica de Canarias. We are grateful to the personnel who took the observations and to Ana Matkovic for her help with the use of the REDucmE software. We also thank the anonymous referee for useful comments that improved the presentation of this Letter.
UCM subjects
Unesco subjects
Keywords
Citation
Barro, G., Pérez González, P. G., Gallego, J., et al. 2011a, ApJS, 193, 13
Barro, G., Pérez González, P. G., Gallego, J., et al. 2011b, ApJS, 193, 30
Bertin, G., Ciotti, L., & Del Principe, M. 2002, A&A, 386, 149
Bruzual, G., & Charlot, S. 2003, MNRAS, 344, 1000
Buitrago, F., Trujillo, I., Conselice, C. J., et al. 2008, ApJ, 687, L61
Bundy, K., Ellis, R. S., Conselice, C. J., et al. 2006, ApJ, 651, 120
Calzetti, D., Armus, L., Bohlin, R. C., et al. 2000, ApJ, 533, 682
Cappellari, M., Bacon, R., Bureau, M., et al. 2006, MNRAS, 366, 1126
Cappellari, M., di Serego Alighieri, S., Cimatti, A., et al. 2009, ApJ, 704, L34
Cappellari, M., Emsellem, E., Bacon, R., et al. 2007, MNRAS, 379, 418
Cardiel, N. 1999, PhD thesis, Univ. Complutense de Madrid, Spain
Cenarro, A. J., & Trujillo, I. 2009, ApJ, 696, L43
Cepa, J. 1998, Ap&SS, 263, 369
Daddi, E., Renzini, A., Pirzkal, N., et al. 2005, ApJ, 626, 680
Damjanov, I., McCarthy, P. J., Abraham, R. G., et al. 2009, ApJ, 695, 101
Davis, M., Guhathakurta, P., Konidaris, N. P., et al. 2007, ApJ, 660, L1
di Serego Alighieri, S., Vernet, J., Cimatti, A., et al. 2005, A&A, 442, 125
Fernández Lorenzo, M., Cepa, J., Bongiovanni, A., et al. 2011, A&A, 526, A72
Gavazzi, R., Treu, T., Rhodes, J. D., et al. 2007, ApJ, 667, 176
Gebhardt, K., Faber, S. M., Koo, D. C., et al. 2003, ApJ, 597, 239
Hamabe, M.,&Kormendy, J. 1987, in IAUSymp. 127, Structure andDynamics of Elliptical Galaxies, ed. P. T. de Zeeuw (Dordrecht: Reidel), 379
Hopkins, P. F., Bundy, K., Hernquist, L.,Wuyts, S., & Cox, T. J. 2010, MNRAS, 401, 1099
Hopkins, P. F., Hernquist, L., Cox, T. J., Keres, D., &Wuyts, S. 2009, ApJ, 691, 1424
Jørgensen, I., Chiboucas, K., Flint, K., et al. 2006, ApJ, 639, L9
Jørgensen, I., Chiboucas, K., Flint, K., et al. 2007, ApJ, 654, L179
Jørgensen, I., Franx, M., & Kjaergaard, P. 1995, MNRAS, 276, 1341
Jørgensen, I., Franx, M., & Kjaergaard, P. 1996, MNRAS, 280, 167
Kennicutt, R. C., Hao, C.-N., Calzetti, D., et al. 2009, ApJ, 703, 1672
Longhetti, M., Saracco, P., Severgnini, P., et al. 2007, MNRAS, 374, 614
Naab, T., Johansson, P. H., & Ostriker, J. P. 2009, ApJ, 699, L178
Peng, C. Y., Ho, L. C., Impey, C. D., & Rix, H.-W. 2002, AJ, 124, 266
Sánchez Blázquez, P., Peletier, R. F., Jiménez Vicente, J., et al. 2006, MNRAS, 371, 703
Shen, S., Mo, H. J., White, S. D. M., et al. 2003, MNRAS, 343, 978
Treu, T., Ellis, R. S., Liao, T. X., & van Dokkum, P. G. 2005, ApJ, 622, L5
Trujillo, I., Cenarro, A. J., de Lorenzo Cáceres, A., et al. 2009, ApJ, 692, L118
Trujillo, I., Conselice, C. J., Bundy, K., et al. 2007, MNRAS, 382, 109
Trujillo, I., Ferreras, I., & de la Rosa, I. G. 2011, MNRAS
Trujillo, I., Förster Schreiber, N. M., Rudnick, G., et al. 2006, ApJ, 650, 18
van der Wel, A., Franx, M., van Dokkum, P. G., et al. 2005, ApJ, 631, 145
van der Wel, A., Franx, M., Wuyts, S., et al. 2006, ApJ, 652, 97
van der Wel, A., & van der Marel, R. P. 2008, ApJ, 684, 260
van Dokkum, P. G., Kriek, M., & Franx, M. 2009, Nature, 460, 717
van Dokkum, P. G., Whitaker, K. E., Brammer, G., et al. 2010, ApJ, 709, 1018
Vazdekis, A., Sánchez Blázquez, P., Falcón Barroso, J., et al. 2010, MNRAS, 404, 1639
Zahid, H. J., Kewley, L. J., & Bresolin, F. 2011, ApJ, 730, 137