Publication:
Spatial analysis of the Hα emission in the local star-forming UCM galaxies

Loading...
Thumbnail Image
Full text at PDC
Publication Date
2003-07-10
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
American Astronomical Society
Citations
Google Scholar
Research Projects
Organizational Units
Journal Issue
Abstract
We present a photometric study of the Halpha emission in the Universidad Complutense de Madrid (UCM) Survey galaxies. This work complements our previously published spectroscopic data. We study the location of the star-forming knots, their intensity and concentration, and the relationship of these properties with those of the host galaxy. We also estimate that the amount of Halpha emission that arises from the diffuse ionized gas is about 15% - 30% of the total Hα flux for a typical UCM galaxy. This percentage seems to be independent of the Hubble type. Conversely, we find that an "average'' UCM galaxy harbors a star formation event with 30% of its Hα luminosity arising from a nuclear component. The implications of these results for higher redshift studies are discussed, including the effects of galaxy size and the depth of the observations. A correlation between the star formation rate and the Balmer decrement is observed, but such correlation breaks down for large values of the extinction. Finally, we recalculate the Hα luminosity function and star formation rate density of the local universe using the new imaging data. Our results point out that, on average, spectroscopic observations detected about one-third of the total emission-line flux of a typical UCM galaxy. The new values obtained for the Halpha luminosity density and the star formation rate density of the local universe are 10^39.3±0.2 ergs s^-1 Mpc^-3 and ρ(SFR) = 0.016_-0.004^+0.007) M_⨀ yr-1 Mpc^-3 (H_0 = 50 km s^-1) Mpc^-1, Ω_M) = 1.0, Λ = 0). The corresponding values for the "concordance cosmology (H_0 = 70 km s^-1 Mpc^-1, Ω_M) = 0.3, Λ = 0.7) are 10^39.5±0.2 ergs s^-1 Mpc-3) and ρ_SFR = 0.029_-0.005^+0.008 M_⨀ yr^-1 Mpc^-3.
Description
© 2003. The American Astronomical Society. P. G. P.-G. wishes to acknowledge the Spanish Ministry of Education and Culture for a Formación de Profesorado Universitario fellowship. A. A.-S. acknowledges generous financial support from the Royal Society. A. G. d. P. acknowledges financial support from NASA through a Long Term Space Astrophysics grant to B. F. Madore. Valuable discussion with Almudena Zurita is acknowledged. We are grateful to the anonymous referee for her/his helpful comments and suggestions. The present work was supported by the Spanish Programa Nacional de Astronomía y Astrofísica under grant AYA 2000-1790.
Unesco subjects
Keywords
Citation
Alonso, O., García Dabó, C. E., Zamorano, J., Gallego, J., & Rego, M. 1999, ApJS, 122, 415 Balzano, V. A. 1983, ApJ, 268, 602 Bell, E. F. 2002, ApJ, 577, 150 Bertin, E., & Arnouts, S. 1996, A&AS, 117, 393 Calzetti, D., Armus, L., Bohlin, R. C., Kinney, A. L., Koornneef, J., & Storchi-Bergmann, T. 2000, ApJ, 533, 682 Cardelli, J. A., Clayton, G. C., & Mathis, J. S. 1989, ApJ, 345, 245 Chitre, A., & Joshi, U. C. 2001, J. Astrophys. Astron., 22, 155 Combes, F. 2001, in ASP Conf. Ser. 249, The Central Kiloparsec of Starbursts and AGN: The La Palma Connection, ed. J. H. Knapen, J. E. Beckman, I. Shlosman, & T. J. Mahoney (San Francisco: ASP), 475 Conselice, C. J., Bershady, M. A., & Gallagher, J. S. 2000a, A&A, 354, L21 Conselice, C. J., Gallagher, J. S., Calzetti, D., Homeier, N., & Kinney, A. 2000b, AJ, 119, 79 Davidge, T. J. 1992, AJ, 103, 1512 de Vaucouleurs, G. 1948, Ann. d’Astrophys., 11, 247 Efstathiou, G., Ellis, R. S., & Peterson, B. A. 1988, MNRAS, 232, 431 Ellis, R. S., Colless, M., Broadhurst, T., Heyl, J., & Glazebrook, K. 1996, MNRAS, 280, 235 Ferguson, A. M. N., Wyse, R. F. G., & Gallagher, J. S. 1996a, AJ, 112, 2567 Ferguson, A. M. N., Wyse, R. F. G., Gallagher, J. S., & Hunter, D. A. 1996b, AJ, 111, 2265 Freeman, K. C. 1970, ApJ, 160, 811 Fukugita, M., Shimasaku, K., & Ichikawa, T. 1995, PASP, 107, 945 Gallego, J. 1995, Ph.D. thesis, Univ. Complutense de Madrid ———. 1998, Ap&SS, 263, 1 Gallego, J., García Dabó, C. E., Zamorano, J., Aragón Salamanca, A., & Rego, M. 2002, ApJ, 570, L1 Gallego, J., Zamorano, J., Aragón Salamanca, A., & Rego, M. 1995, ApJ, 455, L1 Gallego, J., Zamorano, J., Rego, M., Alonso, O., & Vitores, A. G. 1996, A&AS, 120, 323 Gallego, J., Zamorano, J., Rego, M., & Vitores, A. G. 1997, ApJ, 475, 502 Gavazzi, G., Catinella, B., Carrasco, L., Boselli, A., & Contursi, A. 1998, AJ, 115, 1745 Gavazzi, G., Garilli, B., & Boselli, A. 1990, A&AS, 83, 399 Gil de Paz, A., Aragón Salamanca, A., Gallego, J., Alonso Herrero, A., Zamorano, J., & Kauffmann, G. 2000, MNRAS, 316, 357 Goldader, J. D., Meurer, G., Heckman, T. M., Seibert, M., Sanders, D. B., Calzetti, D., & Steidel, C. C. 2002, ApJ, 568, 651 González Delgado, R. M., Leitherer, C., & Heckman, T. M. 1999, ApJS, 125, 489 Guzmán, R., Gallego, J., Koo, D. C., Phillips, A. C., Lowenthal, J. D., Faber, S. M., Illingworth, G. D., & Vogt, N. P. 1997, ApJ, 489, 559 Haarsma, D. B., Partridge, R. B., Windhorst, R. A., & Richards, E. A. 2000, ApJ, 544, 641 Hameed, S., & Devereux, N. 1999, AJ, 118, 730 Hamuy, M., Walker, A. R., Suntzeff, N. B., Gigoux, P., Heathcote, S. R., & Phillips, M. M. 1992, PASP, 104, 533 Hogg, D. W., Cohen, J. G., Blandford, R., & Pahre, M. A. 1998, ApJ, 504, 622 Hoopes, C. G., Walterbos, R. A. M., & Bothun, G. D. 2001, ApJ, 559, 878 Hoopes, C. G., Walterbos, R. A. M., & Greenwalt, B. E. 1996, AJ, 112, 1429 Hopkins, A. M., Connolly, A. J., Haarsma, D. B., & Cram, L. E. 2001, AJ, 122, 288 Huchra, J., & Sargent, W. L. W. 1973, ApJ, 186, 433 Iglesias Páramo, J., & Vílchez, J. M. 1999, ApJ, 518, 94 Jarrett, T. H., Chester, T., Cutri, R., Schneider, S., Skrutskie, M., & Huchra, J. P. 2000, AJ, 119, 2498 Jones, D. H., & Bland-Hawthorn, J. 2001, ApJ, 550, 593 Kauffmann, G., et al. 2003, MNRAS, 341, 33 Kennicutt, R. C., Jr. 1983, ApJ, 272, 54 ———. 1989, ApJ, 344, 685 ———. 1998a, ARA&A, 36, 189 ———. 1998b, ApJ, 498, 541 Kennicutt, R. C., Jr., Bothun, G. D., & Schommer, R. A. 1984, AJ, 89, 1279 Kennicutt, R. C., Jr., & Kent, S. M. 1983, AJ, 88, 1094 Kennicutt, R. C., Jr., Tamblyn, P., & Congdon, C. E. 1994, ApJ, 435, 22 Landolt, A. U. 1992, AJ, 104, 340 Lanzetta, K. M., Yahata, N., Pascarelle, S., Chen, H., & Fernández Soto, A. 2002, ApJ, 570, 492 Lehnert, M. D., & Heckman, T. M. 1994, ApJ, 426, L27 ———. 1996, ApJ, 472, 546 Lilly, S. J., Le Fèvre, O., Hammer, F., & Crampton, D. 1996, ApJ, 460, L1 Madau, P., Pozzetti, L., & Dickinson, M. 1998, ApJ, 498, 106 Meurer, G. R., Heckman, T. M., Lehnert, M. D., Leitherer, C., & Lowenthal, J. 1997, AJ, 114, 54 Oey, M. S., & Kennicutt, R. C., Jr. 1997, MNRAS, 291, 827 Oke, J. B. 1990, AJ, 99, 1621 Pascual, S., Gallego, J., Aragón Salamanca, A., & Zamorano, J. 2001, A&A, 379, 798 Pérez González, P. G., Gallego, J., Zamorano, J., & Gil de Paz, A. 2001a, A&A, 365, 370 Pérez González, P. G., Gil de Paz, A., Zamorano, J., Gallego, J., Alonso Herrero, A., & Aragón Salamanca, A. 2003a, MNRAS, 338, 508 ———. 2003b, MNRAS, 338, 525 Pérez González, P. G., Zamorano, J., & Gallego, J. 2001b, in Highlights of Spanish Astrophysics II, ed. J. Zamorano, J. Gorgas, & J. Gallego (Dordrecht: Kluwer), 97 Pérez González, P. G., Zamorano, J., Gallego, J., & Gil de Paz, A. 2000, A&AS, 141, 409 Pettini, M., Shapley, A. E., Steidel, C. C., Cuby, J.-G., Dickinson, M., Moorwood, A. F. M., Adelberger, K. L., & Giavalisco, M. 2001, ApJ, 554, 981 Pisano, D. J., Kobulnicky, H. A., Guzmán, R., Gallego, J., & Bershady, M. A. 2001, AJ, 122, 1194 Quirk, W. J. 1972, ApJ, 176, L9 Reynolds, R. J. 1990, in IAU Symp. 139, The Galactic and Extragalactic Background Radiation, ed. S. C. Bowyer & C. Leinert (Dordrecht: Kluwer), 157 Rowan-Robinson, M. 2001, ApJ, 549, 745 Rozas, M., Beckman, J. E., & Knapen, J. H. 1996, A&A, 307, 735 Salzer, J. J., MacAlpine, G. M., & Boroson, T. A. 1989, ApJS, 70, 479 Sandage, A., Tammann, G. A., & Yahil, A. 1979, ApJ, 232, 352 Sauvage, M., & Thuan, T. X. 1994, ApJ, 429, 153 Schmidt, M. 1968, ApJ, 151, 393 Serjeant, S., Gruppioni, C., & Oliver, S. 2002, MNRAS, 330, 621 Somerville, R. S., Primack, J. R., & Faber, S. M. 2001, MNRAS, 320, 504 Songaila, A., Cowie, L. L., Hu, E. M., & Gardner, J. P. 1994, ApJS, 94, 461 Stoughton, C., et al. 2002, AJ, 123, 485 Sullivan, M., Mobasher, B., Chan, B., Cram, L., Ellis, R., Treyer, M., & Hopkins, A. 2001, ApJ, 558, 72 Trager, S. C., Worthey, G., Faber, S. M., Burstein, D., & González, J. J. 1998, ApJS, 116, 1 Tresse, L., Maddox, S., Le Fèvre, O., & Cuby, J. G. 2002, MNRAS, 337, 369 Vitores, A. G., Zamorano, J., Rego, M., Alonso, O., & Gallego, J. 1996a, A&AS, 118, 7 Vitores, A. G., Zamorano, J., Rego, M., Gallego, J., & Alonso, O. 1996b, A&AS, 120, 385 Wang, J., Heckman, T. M., & Lehnert, M. D. 1997, ApJ, 491, 114 ———. 1999, ApJ, 515, 97 Yan, L., McCarthy, P. J., Freudling, W., Teplitz, H. I., Malumuth, E. M., Weymann, R. J., & Malkan, M. A. 1999, ApJ, 519, L47 Youngblood, A. J., & Hunter, D. A. 1999, ApJ, 519, 55 Zamorano, J., Gallego, J., Rego, M., Vitores, A. G., & Alonso, O. 1996, ApJS, 105, 343 Zamorano, J., Rego, M., Gallego, J. G., Vitores, A. G., González Riestra, R., & Rodríguez Caderot, G. 1994, ApJS, 95, 387 Zurita, A. 2001, Ph.D. thesis, Instituto de Astrofísica de Canarias Zurita, A., Beckman, J. E., Rozas, M., & Ryder, S. 2002, A&A, 386, 801
Collections