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Abstract:

Integrated Washington photometry has been obtained for the globular cluster system of NGC 1399, the central elliptical galaxy in the Fornax cluster. A new integrated metallicity index, C-T1, is defined which is about 3 times more sensitive to metal abundance than the previous such Washington index. Abundances accurate to 0.3 dex are derived for ∼150 of the brightest globular clusters. The clusters have a broad, flattened abundance distribution, with a mean metallicity of [Fe/H] = ∼0.85 ± 0.1, 0.75 dex more metal-poor than the halo. A significant fraction of the clusters have an approximately solar abundance, while virtually no clusters exist with [Fe/H] < -2. The luminosity function is also determined for ∼600 clusters to a limiting magnitude of T1∼23.75 (50% completeness limit). The luminosity function clearly shows a turnover at T1 = 23.0 ± 0.15 or V = 23.45 ± 0.16. Matching this luminosity function with that for the globular cluster system of the Galaxy and M87 yields a distance modulus of 31.0 ± 0.25 for Fornax, 0.5 ± 0.2 mag closer than Virgo. A Hubble constant of 66 ± 14 km s-1 Mpc-1 is derived assuming a canonical value for the Local Group Virgocentric infall velocity. Alternatively, solving for this infall velocity gives a value of 236 km s-1.

Registro:

Documento: Artículo
Título:The abundance distribution and luminosity function of globular clusters in NGC 1399
Autor:Geisler, D.; Forte, J.C.
Filiación:Natl. Optical Astron. Observatories, Cerro Tololo Inter-Amer. Observatory
Inst. Astronomia y Fis. del Espacio, Buenos Aires, Argentina
Assoc. Universities Res. Astron., I., National Science Foundation
Inst. Astronomia y Fis. del Espacio, Casilla de Correo 67, Sucursal 28, 1428 Buenos Aires, Argentina
Natl. Optical Astron. Observatories, Cerro Tololo Inter-Amer. Observatory, Casilla 603, La Serena, Chile
Palabras clave:Abundances; Clusters: globular; Galaxies: abundances; Galaxies: distances; Luminosity function
Año:1990
Volumen:350
Número:1 PART 2
Página de inicio:L5
Página de fin:L8
DOI: http://dx.doi.org/10.1086/185654
Título revista:Astrophysical Journal
Título revista abreviado:Astrophys. J.
ISSN:0004637X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v350_n1PART2_pL5_Geisler

Referencias:

  • Aaronson, M., Huchra, J., Mould, J., Schechter, P.L., Tully, R.B., (1982) Ap. J., 258, p. 64
  • Armandroff, T.E., (1989) A.J., 97, p. 375
  • Armandroff, T.E., Zinn, R., (1988) A.J., 96, p. 92
  • Bothun, G.D., Caldwell, N., Schombert, J.M., (1989) A.J., 98, p. 1542
  • Bridges, T., Hanes, D.A., Harris, W.E., (1990), in preparation; Canterna, R., (1976) A.J., 81, p. 228
  • Cohen, J.G., (1988) A.J., 95, p. 682
  • Couture, J., Harris, W.E., Allwright, J.W.B., (1990), preprint; Dawe, J.A., Dickens, R.J., (1976) Nature, 263, p. 395
  • Dressler, A., Lynden-Bell, D., Burstein, D., Davies, R., Faber, S., Terlevich, R., Wegner, G., (1987) Ap. J., 313, p. 42
  • Forte, J.C., Strom, S.E., Strom, K.M., (1981) Ap. J. (Letters), 245, pp. L9
  • Geisler, D., Forte, J.C., (1989) Rev. Mexicana Astr. Af., , in press
  • Hanes, D.A., Harris, W.E., (1986) Ap. J., 309, p. 564
  • Hanes, D.A., Whittaker, D.G., (1987) A.J., 94, p. 906
  • Harris, H.C., Canterna, R., (1977) A.J., 82, p. 798
  • Harris, H.C., Harris, G.L.H., Hesser, J.E., (1988) IAU Symposium 126, Globular Cluster Systems in Galaxies, p. 205. , ed. J. E. Grindlay and A. G. D. Philip (Dordrecht: Kluwer)
  • Harris, W.E., (1988) The Extragalactic Distance Scale, 4, p. 231. , A.S.P. Conf. Series, ed. S. van den Bergh and C. J. Pritchet (New York: ASP), (H88)
  • Harris, W.E., Smith, M.G., (1976) Ap. J., 207, p. 1036
  • Harris, W.E., Smith, M.G., Myra, E.S., (1983) Ap. J., 272, p. 456
  • Hesser, J.E., Shawl, S.J., (1985) Pub. A.S.P., 97, p. 465
  • Mayall, N.U., (1946) Ap. J., 104, p. 290
  • Pierce, M.J., (1989) Ap. J. (Letters), 344, pp. L57
  • Reed, B.C., Hesser, J.E., Shawl, S.J., (1988) Pub. A.S.P., 100, p. 545
  • Stetson, P.B., (1987) Pub. A.S.P., 99, p. 191
  • Strom, S.E., Forte, J.C., Harris, W.E., Strom, K.M., Wells, D.C., Smith, M.G., (1981) Ap. J., 245, p. 416. , S81
  • Van Den Bergh, S., (1967) A.J., 72, p. 70
  • (1969) Ap. J. Suppl., 19, p. 145
  • (1981) Science, 213, p. 825
  • Wagner, S., Richtler, T., Hopp, U., (1989), preprint; Zinn, R., (1980) Ap. J. Suppl., 42, p. 19
  • (1985) Ap. J., 293, p. 424

Citas:

---------- APA ----------
Geisler, D. & Forte, J.C. (1990) . The abundance distribution and luminosity function of globular clusters in NGC 1399. Astrophysical Journal, 350(1 PART 2), L5-L8.
http://dx.doi.org/10.1086/185654
---------- CHICAGO ----------
Geisler, D., Forte, J.C. "The abundance distribution and luminosity function of globular clusters in NGC 1399" . Astrophysical Journal 350, no. 1 PART 2 (1990) : L5-L8.
http://dx.doi.org/10.1086/185654
---------- MLA ----------
Geisler, D., Forte, J.C. "The abundance distribution and luminosity function of globular clusters in NGC 1399" . Astrophysical Journal, vol. 350, no. 1 PART 2, 1990, pp. L5-L8.
http://dx.doi.org/10.1086/185654
---------- VANCOUVER ----------
Geisler, D., Forte, J.C. The abundance distribution and luminosity function of globular clusters in NGC 1399. Astrophys. J. 1990;350(1 PART 2):L5-L8.
http://dx.doi.org/10.1086/185654