Navegar

Colección

Datos Estadísticas

Artículo

Piatti, A.E.; Santos Jr., J.F.C.; Clariá, J.J.; Bica, E.; Ahumada, A.V.; Parisi, M.C. "Integrated spectral analysis of 18 concentrated star clusters in the Small Magellanic Cloud" (2005) Astronomy and Astrophysics. 440(1):111-120
Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

We present in this study flux-calibrated integrated spectra in the range (3600-6800) Å for 18 concentrated SMC clusters. Cluster reddening values were estimated by interpolation between the extinction maps of Burstein & Heiles (1982, AJ, 87, 1165) and Schlegel et al. (1998, ApJ, 500, 525). The cluster parameters were derived from the template matching procedure by comparing the line strengths and continuum distribution of the cluster spectra with those of template cluster spectra with known parameters and from the equivalent width (EW) method. In this case, new calibrations were used together with diagnostic diagrams involving the sum of EWs of selected spectral lines. A very good agreement between ages derived from both methods was found. The final cluster ages obtained from the weighted average of values taken from the literature and the present measured ones range from 15 Mr (e.g. L 51) to 7 Gyr (K 3). Metal abundances have been derived for only 5 clusters from the present sample, while metallicity values directly averaged from published values for other 4 clusters have been adopted. Combining the present cluster sample with 19 additional SMC clusters whose ages and metal abundances were put onto a homogeneous scale, we analyse the age and metallicity distributions in order to explore the SMC star formation history and its spatial extent. By considering the distances of the clusters from the SMC centre instead of their projections onto the right ascension and declination axes, the present age-position relation suggests that the SMC inner disk could have been related to a cluster formation episode which reached the peak ∼2.5 Gyr ago. Evidence for an age gradient in the inner SMC disk is also presented. © ESO 2005.

Registro:

Documento: Artículo
Título:Integrated spectral analysis of 18 concentrated star clusters in the Small Magellanic Cloud
Autor:Piatti, A.E.; Santos Jr., J.F.C.; Clariá, J.J.; Bica, E.; Ahumada, A.V.; Parisi, M.C.
Filiación:Instituto de Astronomía y Física del Espacio, CC 67, Suc. 28, 1428 Buenos Aires, Argentina
Departamento de Física, ICEx, UFMG, CP 70, 230123-970 Belo Horizonte, MG, Brazil
Observatorio Astronómico, Laprida 854, 5000 Córdoba, Argentina
Depto. de Astronomia, UFRGS, CP 15051, 91500-970 Porto Alegre, Brazil
Palabras clave:Galaxies: star clusters; Magellanic Clouds; Techniques: spectroscopic; Calibration; Clouds; Continuum mechanics; Estimation; Galaxies; Interpolation; Spectroscopic analysis; Cluster formation; Galaxies: star clusters; Magellanic clouds; Techniques: spectroscopic; Astrophysics
Año:2005
Volumen:440
Número:1
Página de inicio:111
Página de fin:120
DOI: http://dx.doi.org/10.1051/0004-6361:20052982
Título revista:Astronomy and Astrophysics
Título revista abreviado:Astron. Astrophys.
ISSN:00046361
CODEN:AAEJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v440_n1_p111_Piatti

Referencias:

  • Abia, C., Isern, J., (2000) ApJ, 536, p. 438
  • Ahumada, A.V., Clariá, J.J., Bica, E., Dutra, C.M., (2002) A&A, 393, p. 855
  • Alcaino, G., Alvarado, F., Borissova, J., Kurtev, R., (2003) A&A, 400, p. 917
  • Alves, D.R., Sarajedini, A., (1999) ApJ, 511, p. 225
  • Barnbaum, C., Stone, R.P.S., Keenan, P.C., (1996) ApJS, 105, p. 419
  • Bellazzini, M., Ibata, R., Monaco, L., (2005) MNRAS, , in press
  • Bekki, K., Couch, W.J., Beasley, M.A., (2004) ApJ, 610, pp. L93
  • Bica, E., (1988) A&A, 195, p. 76
  • Bica, E., Alloin, D., (1986) A&A, 162, p. 21
  • Bica, E., Dottori, H., Pastoriza, M., (1986) A&A, 156, p. 261
  • Bica, E., Dutra, C.M., (2000) AJ, 119, p. 1214
  • Bica, E., Schmitt, H.R., (1995) ApJS, 101, p. 41
  • Brocato, E., Di Carlo, E., Menna, G., (2001) A&A, 374, p. 523
  • Burstein, D., Heiles, C., (1982) AJ, 87, p. 1165
  • Cioni, M.R., Van Der Marel, R.P., Loup, C., Habing, H.J., (2000) A&A, 359, p. 601
  • Crowl, H.H., Sarajedini, A., Piatti, A.E., (2001) AJ, 122, p. 220
  • Da Costa, G.S., (1991) IAUS, 148, p. 183
  • Da Costa, G.S., Armandroff, T.E., (1995) AJ, 109, p. 2533
  • Da Costa, G.S., Mould, J.R., (1986) ApJ, 305, p. 214
  • De Oliveira, M.R., Dutra, C.M., Bica, E., Dottori, H., (2000) A&AS, 146, p. 57
  • Dolphin, A.E., Walker, A.R., Hodge, P.W., (2001) ApJ, 562, p. 303
  • Durand, D., Hardy, E., Melnick, J., (1984) ApJ, 283, p. 552
  • Dutra, C.M., Bica, E., Clariá, J.J., Piatti, A.E., Ahumada, A.V., (2001) A&A, 371, p. 895
  • Dutra, C.M., Bica, E., Clariá, J.J., Piatti, A.E., (1999) MNRAS, 305, p. 373
  • Elson, R.A.W., Fall, S.M., (1988) AJ, 96, p. 1383
  • Girardi, L., Bertelli, G., Bressan, A., (2002) A&A, 391, p. 195
  • Gonzalez, R.A., Liu, M.C., Bruzual, G.A., (2004) ApJ, 611, p. 270
  • Harris, J., Zaritsky, D., (2004) AJ, 127, p. 1531
  • Hodge, P., (1988) PASP, 100, p. 1051
  • Hodge, P., (1989) ARA&A, 27, p. 139
  • Hodge, P.W., Wright, F.W., (1974) AJ, 79, p. 858
  • Kahabka, P., (2004) A&A, 416, p. 57
  • Kron, G.E., (1956) PASP, 68, p. 125
  • Lauberts, A., (1982) The ESO/Uppsala Survey of the ESO (B) Atlas, , European Southern Observatory, Garching bei Munchen
  • Leonardi, A.J., Rose, J.A., (2003) AJ, 126, p. 1811
  • Lin, D.N.C., Jones, B.F., Klemola, A.R., (1995) ApJ, 439, p. 652
  • Lindsay, E.M., (1958) MNRAS, 118, p. 172
  • Matteucci, A., Ripepi, V., Brocato, E., Castellani, V., (2002) A&A, 387, p. 861
  • Mighell, K.J., Sarajedini, A., French, R.S., (1998) AJ, 116, p. 2395
  • Mould, J.R., Jensen, J.B., Da Costa, G.S., (1992) ApJS, 82, p. 489
  • Munari, U., Zwitter, T., (2002) A&A, 383, p. 188
  • Pagel, B.E.J., Tautvaisiene, G., (1999) Ap&SS, 265, p. 461
  • Papenhausen, P., Schommer, R.A., (1988) IAU Symp., 126, p. 565. , ed. J. Grindlay, & A. G. Davis Philip (Dordrecht: Kluwer Academic Publishers)
  • Piatti, A.E., Bica, E., Clariá, J.J., Santos Jr., J.F.C., Ahumada, A.V., (2002) MNRAS, 335, p. 233
  • Piatti, A.E., Santos Jr., J.F.C., Clariá, J.J., (2001) MNRAS, 325, p. 792
  • Piatti, A.E., Sarajedini, A., Geisler, D., Bica, E., Clariá, J.J., (2002) MNRAS, 329, p. 556
  • Piatti, A.E., Sarajedini, A., Geisler, D., Seguel, J., Clark, D., (2005) MNRAS, 358, p. 1215
  • Pietrzynski, G., Udalski, A., Kubiat, M., (1998) Acta Astron., 48, p. 175
  • Pietrzynski, G., Udalski, A., (1999) AcA, 49, p. 157
  • Rabin, D., (1982) ApJ, 261, p. 85
  • Rich, R.M., Da Costa, G.S., Mould, J.R., (1984) ApJ, 286, p. 517
  • Rich, R.M., Shara, M., Fall, S.M., Zurek, D., (2000) AJ, 119, p. 197
  • Santos Jr., J.F.C., Alloin, D., Bica, E., Bonatto, C., (2002) IAU Symp., 207, p. 727. , ed. D. Geisler, E. K. Grebel, & D. Minniti (San Francisco: ASP)
  • Santos Jr., J.F.C., Bica, E., Clariá, J.J., (1995) MNRAS, 276, p. 1155
  • Santos Jr., J.F.C., Piatti, A.E., (2004) A&A, 428, p. 79. , SP
  • Schlegel, D., Finkbeiner, D., Davis, M., (1998) ApJ, 500, p. 525
  • Searle, L., Wilkinson, A., Bagnuolo, W.G., (1980) ApJ, 239, p. 803
  • Silva, D.R., Cornell, M.E., (1992) ApJS, 81, p. 865
  • Stone, R., Baldwin, J., (1983) MNRAS, 204, p. 347
  • Stothers, R.B., Chin, C.L., (1992) ApJ, 390, p. 136
  • Zaritsky, D., Harris, J., Thompson, I.B., (1997) AJ, 114, p. 1002

Citas:

---------- APA ----------
Piatti, A.E., Santos Jr., J.F.C., Clariá, J.J., Bica, E., Ahumada, A.V. & Parisi, M.C. (2005) . Integrated spectral analysis of 18 concentrated star clusters in the Small Magellanic Cloud. Astronomy and Astrophysics, 440(1), 111-120.
http://dx.doi.org/10.1051/0004-6361:20052982
---------- CHICAGO ----------
Piatti, A.E., Santos Jr., J.F.C., Clariá, J.J., Bica, E., Ahumada, A.V., Parisi, M.C. "Integrated spectral analysis of 18 concentrated star clusters in the Small Magellanic Cloud" . Astronomy and Astrophysics 440, no. 1 (2005) : 111-120.
http://dx.doi.org/10.1051/0004-6361:20052982
---------- MLA ----------
Piatti, A.E., Santos Jr., J.F.C., Clariá, J.J., Bica, E., Ahumada, A.V., Parisi, M.C. "Integrated spectral analysis of 18 concentrated star clusters in the Small Magellanic Cloud" . Astronomy and Astrophysics, vol. 440, no. 1, 2005, pp. 111-120.
http://dx.doi.org/10.1051/0004-6361:20052982
---------- VANCOUVER ----------
Piatti, A.E., Santos Jr., J.F.C., Clariá, J.J., Bica, E., Ahumada, A.V., Parisi, M.C. Integrated spectral analysis of 18 concentrated star clusters in the Small Magellanic Cloud. Astron. Astrophys. 2005;440(1):111-120.
http://dx.doi.org/10.1051/0004-6361:20052982