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The Stellar Populations of dE Galaxies in Nearby Groups* †

Published online by Cambridge University Press:  05 March 2013

G. S. Da Costa
G. S. Da Costa*
Affiliation:
Research School of Astronomy & Astrophysics, Mt Stromlo Observatory, Australian National University, Weston Creek ACT 2611, Australia. Email: gdc@mso.anu.edu.au
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Abstract

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In this contribution Gemini-North NIRI J,K-observations are used to investigate the upper-Asymptotic Giant Branch (AGB) intermediate-age population in the M81 Group dwarf elliptical (dE) F8D1. Hubble Space Telescope (HST) ‘snapshot’ V,I-observations are also analysed to investigate the upper-AGB populations in two other M81 Group dEs, DDO 71 and kk077. In all three dEs, significant intermediate-age populations are found. Further, there are sizeable dE-to-dE differences in these populations: F8D1 contains relatively more, and relatively more luminous, upper-AGB stars. These results are compared with existing information for Local Group and Sculptor group dwarfs. It is suggested that ‘environmental harrassment’ plays an important role in governing dwarf galaxy evolution.

Keywords

galaxies: dwarfgalaxies: evolutiongalaxies: stellar contentstars: Population II
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 21 , Special Issue 4: Structure and Dynamics in the Local Universe , 2004 , pp. 366 - 370
Copyright
Copyright © Astronomical Society of Australia 2004

Footnotes

* Based in part on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (USA), the Particle Physics and Astronomy Research Councial (UK), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), CNPq (Brazil) and CONICET (Argentina).

† Based in part on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute. STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

References

Caldwell, N., Armandroff, T. E., Da Costa, G. S., & Seitzer, P. 1998, AJ, 115, 535 Google Scholar
Da Costa, G. S. 1998, in Stellar Astrophysics for the Local Group, eds. A. Aparicio, A. Herrero, & F. Sánchez (Cambridge: CUP), p. 351 Google Scholar
Da Costa, G. S., Armandroff, T. E., Caldwell, N., & Seitzer, P. 2000, AJ, 119, 705 Google Scholar
Da Costa, G. S., Armandroff, T. E., & Caldwell, N. 2002, AJ, 124, 332 Google Scholar
Frogel, J. A., Mould, J., & Blanco, V. M. 1990, ApJ, 352, 96 Google Scholar
Gallart, C., Freedman, W. L., Aparicio, A., Bertelli, G., & Chiosi, C. 1999, AJ, 118, 2245 CrossRefGoogle Scholar
Girardi, L., Bressan, A., Bertelli, G., & Chiosi, C. 2000, A&AS, 141, 371 Google Scholar
Grebel, E. K. 1999, in The Stellar Content of Local Group Galaxies, IAU Symp. 192, eds. P. Whitelock, & R. Cannon (San Francisco: ASP), p. 17 Google Scholar
Grebel, E. K. 2001, Ap&SS, 277, 231 (astro-ph/0011048)Google Scholar
Grebel, E. K., Gallagher, J. S. III, & Harbeck, D. 2003, AJ, 125, 1926 CrossRefGoogle Scholar
Harbeck, D., Gallagher, J. S. III, & Grebel, E. K. 2004, AJ, 127, 2711 Google Scholar
Holtzman, J., Smith, G. H., & Grillmair, C. 2000, AJ, 120, 3060 CrossRefGoogle Scholar
Hurley-Keller, D., Mateo, M., & Nemec, J. 1998, AJ, 115, 1840 Google Scholar
Jerjen, H., & Rejkuba, M. 2001, A&A, 371, 487 Google Scholar
Jerjen, H., Binggeli, B. & Freeman, K. C. 2000, AJ, 119, 593 CrossRefGoogle Scholar
Johnson, R. A., Lawrence, A., Terlevich, R., & Carter, D. 1987, MNRAS, 287, 333 CrossRefGoogle Scholar
Karachentsev, I. D., Sharina, M. E., Grebel, E. K., Dolphin, A. E., Geisler, D., Guhathakurta, P., Hodge, P. W., Karachentseva, V. E., Sarajedini, A., & Seitzer, P. 2000, ApJ, 542, 128 CrossRefGoogle Scholar
Karachentsev, I. D., Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., Hodge, P. W., Karachentseva, V. E., Sarajedini, A., Seitzer, P., & Sharina, M. E. 2002, A&A, 383, 125 Google Scholar
Karachentsev, I. D., Grebel, E. K., Sharina, M. E., Dolphin, A. E., Geisler, D., Guhathakurta, P., Hodge, P. W., Karachentseva, V. E., Sarajedini, A., & Seitzer, P. 2003, A&A, 404, 93 Google Scholar
Mateo, M. 1998, ARA&A, 36, 435 Google Scholar
Mayer, L., Governato, F., Colpi, M., Moore, B., Quinn, T., Wadsley, J., Stadel, J., & Lake, G. 2001, ApJ, 547, L123 CrossRefGoogle Scholar
Menzies, J., Feast, M., Tanabé, T., Whitelock, P., & Nakaka, Y. 2002, MNRAS, 335, 923 Google Scholar
Miller, B. W., Dolphin, A. E., Lee, M. G., Kim, S. C., Hodge, P. 2001, ApJ, 562, 713 Google Scholar
Mould, J. R., Cannon, R. D., Frogel, J. A., & Aaronson, M. 1982, ApJ, 254, 500 Google Scholar
Piatek, S., Pryor, C., Olszewski, E. W., Harris, H. C., Mateo, M., Minniti, D., Monet, D. G., Morrison, H., & Tinney, C. G. 2002, AJ, 124, 3198 Google Scholar
Piatek, S., Pryor, C., Olszewski, E. W., Harris, H. C., Mateo, M., Minniti, D., & Tinney, C. G. 2003, AJ, 126, 2346 Google Scholar
Pritzl, B. J., Armandroff, T. E., Jacoby, G. H., & Da Costa, G. S. 2004, AJ, 127, 318 CrossRefGoogle Scholar
van den Bergh, S. 1994, ApJ, 428, 617 CrossRefGoogle Scholar
Yun, M. S., Ho, P. T. P., & Lo, K. Y. 1994, Natur, 372, 530 Google Scholar