Abstract
In this paper we present the stellar population synthesis results for a sample of 75 bulges in isolated spiral Sb-Sc galaxies, using the spectroscopic data from the Sloan Digital Sky Survey and the STARLIGHT code. We find that both pseudo-bulges and classical bulges in our sample are predominantly composed of old stellar populations, with mean mass-weighted stellar age around 10 Gyr. While the stellar population of pseudo-bulges is, in general, younger than that of classical bulges, the difference is not significant, which indicates that it is hard to distinguish pseudo-bulges from classical bulges, at least for these isolated galaxies, only based on their stellar populations. Pseudo-bulges have star formation activities with relatively longer timescale than classical bulges, indicating that secular evolution is more important in this kind of systems. Our results also show that pseudo-bulges have a lower stellar velocity dispersion than their classical counterparts, which suggests that classical bulges are more dispersion-supported than pseudo-bulges.
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Abazajian, K.N., et al.: Astrophys. J. Suppl. Ser. 182, 543 (2009)
Adelman-McCarthy, J.K., et al.: Astrophys. J. Suppl. Ser. 175, 297 (2008)
Asari, N.V., et al.: Mon. Not. R. Astron. Soc. 381, 263 (2007)
Bender, R., Burstein, D., Faber, S.M.: Astrophys. J. 399, 462 (1992)
Bender, R., Burstein, D., Faber, S.M.: Astrophys. J. 411, 153 (1993)
Bruzual, G., Charlot, S.: Mon. Not. R. Astron. Soc. 344, 1000 (2003)
Cardelli, J.A., Clayton, G.C., Mathis, J.S.: Astrophys. J. 345, 245 (1989)
Cid Fernandes, R., Mateus, A., Sodré, L. Jr., Stasińska, G., Gomes, J.M.: Mon. Not. R. Astron. Soc. 358, 363 (2005)
Cid Fernandes, R., Asari, N.V., Sodré, L., Stasińska, G., Mateus, A., Torres-Papaqui, J.P., Schoenell, W.: Mon. Not. R. Astron. Soc. 375, 16 (2007)
Durbala, A., Sulentic, J.W., Buta, R., Verdes-Montenegro, L.: Mon. Not. R. Astron. Soc. 390, 881 (2008)
Faber, S.M., Jackson, R.E.: Astrophys. J. 204, 668 (1976)
Fisher, D.B.: Astrophys. J. 642, L17 (2006)
Fisher, D.B., Drory, N.: Astron. J. 136, 839 (2008a)
Fisher, D.B., Drory, N.: Astrophys. J. 716, 942 (2008b)
Gadotti, D.A.: Mon. Not. R. Astron. Soc. 384, 420 (2008)
Gadotti, D.A.: Mon. Not. R. Astron. Soc. 393, 1531 (2009)
Gorgas, J., Jablonka, P., Goudfrooij, P.: Astron. Astrophys. 474, 1081 (2007)
Graham, A.W., EAS Publ. Ser. 48, 231 (2011)
Graham, A.W., Driver, S.P.: Publ. Astron. Soc. Pac. 22, 118 (2005)
Héraudeau, Ph., Simien, F.: Astron. Astrophys. Suppl. Ser. 133, 317 (1998)
Jablonka, P., Martin, P., Arimoto, N.: Astron. J. 112, 1415 (1996)
Karachentseva, V.E.: Astrofiz. Issled. (Leningr.) 8, 3 (1973)
Kauffmann, G.: Mon. Not. R. Astron. Soc. 281, 487 (1996)
Kormendy, J.: Astrophys. J. 218, 333 (1977)
Kormendy, J.: Astrophys. J. 292, L9 (1985)
Kormendy, J.: In: IAU Symp., vol. 153: Galactic Bulges, p. 209 (1993)
Kormendy, J., Kennicutt, R.C. Jr.: Annu. Rev. Astron. Astrophys. 42, 603 (2004)
Larson, R.B.: Mon. Not. R. Astron. Soc. 166, 585 (1974)
La Barbera, F., de Carvalho, R.R., de La Rosa, I.G., Lopes, P.A.A.: Mon. Not. R. Astron. Soc. 408, 1335 (2010)
Le Borgne, J.-F., et al.: Astron. Astrophys. 402, 433 (2003)
MacArthur, L.A., González, J.J., Courteau, S.: Mon. Not. R. Astron. Soc. 395, 28 (2009)
Mateus, A., Sodré, L., Cid Fernandes, R., Stasińska, G., Schoenell, W., Gomes, J.M.: Mon. Not. R. Astron. Soc. 370, 721 (2006)
Morelli, L., Pompei, E., Pizzella, A., Méndez-Abreu, J., Corsini, E.M., Coccato, L., Saglia, R.P., Sarzi, M., Bertola, F.: Mon. Not. R. Astron. Soc. 389, 341 (2008)
Pizzella, A., Corsini, E.M., Vega Beltrán, J.C., Bertola, F.: Astron. Astrophys. 424, 447 (2004)
Prugniel, Ph., Maubon, G., Simien, F.: Astron. Astrophys. 366, 68 (2001)
Salpeter, E.E.: Astrophys. J. 121, 161 (1955)
Schlegel, D.J., Finkbeiner, D.P., Davis, M.: Astrophys. J. 500, 525 (1998)
Tremonti, C.A., et al.: Astrophys. J. 613, 898 (2004)
Verdes-Montenegro, L., Sulentic, J., Lisenfeld, U., Leon, S., Espada, D., Garcia, E., Sabater, J., Verley, S.: Astron. Astrophys. 436, 443 (2005)
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Zhao, Y. Stellar populations of classical and pseudo-bulges for a sample of isolated spiral galaxies. Astrophys Space Sci 337, 719–728 (2012). https://doi.org/10.1007/s10509-011-0875-7
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DOI: https://doi.org/10.1007/s10509-011-0875-7