HST photometry of the binary globular cluster Sersic 13N-S in NGC5128

D. Villegas, D. Minniti, J. G. Funes

Resultado de la investigación: Article

2 Citas (Scopus)

Resumen

Using Hubble Space Telescope archival images we resolved individual stars in two young globular clusters centered in the giant HII region Sersic 13, on the dust band of NGC 5128. We resolved 5 sources in the southern cluster and 4 sources in the northern one. The high U luminosity of these stars (-9.3 < MF336W < -7.8) added to the previously detected WR features in the integrated spectra of the clusters suggest we are identifying the most massive stars of the clusters, with O or WR spectral types, whose masses can even reach 120 M. We have estimated their ages in t ≤ 6 × 10 6 yr for comparison with two different set of isochrones, which is consistent with an scenario where the clusters form a binary pair that would merge in a short timescale.

Idioma originalEnglish
Páginas (desde-hasta)437-442
Número de páginas6
PublicaciónAstronomy and Astrophysics
Volumen442
N.º2
DOI
EstadoPublished - nov 2005

Huella dactilar

globular clusters
photometry
dust
timescale
stars
massive stars
Hubble Space Telescope
luminosity
comparison
young

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Citar esto

Villegas, D. ; Minniti, D. ; Funes, J. G. / HST photometry of the binary globular cluster Sersic 13N-S in NGC5128. En: Astronomy and Astrophysics. 2005 ; Vol. 442, N.º 2. pp. 437-442.
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HST photometry of the binary globular cluster Sersic 13N-S in NGC5128. / Villegas, D.; Minniti, D.; Funes, J. G.

En: Astronomy and Astrophysics, Vol. 442, N.º 2, 11.2005, p. 437-442.

Resultado de la investigación: Article

TY - JOUR

T1 - HST photometry of the binary globular cluster Sersic 13N-S in NGC5128

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AU - Minniti, D.

AU - Funes, J. G.

PY - 2005/11

Y1 - 2005/11

N2 - Using Hubble Space Telescope archival images we resolved individual stars in two young globular clusters centered in the giant HII region Sersic 13, on the dust band of NGC 5128. We resolved 5 sources in the southern cluster and 4 sources in the northern one. The high U luminosity of these stars (-9.3 < MF336W < -7.8) added to the previously detected WR features in the integrated spectra of the clusters suggest we are identifying the most massive stars of the clusters, with O or WR spectral types, whose masses can even reach 120 M⊙. We have estimated their ages in t ≤ 6 × 10 6 yr for comparison with two different set of isochrones, which is consistent with an scenario where the clusters form a binary pair that would merge in a short timescale.

AB - Using Hubble Space Telescope archival images we resolved individual stars in two young globular clusters centered in the giant HII region Sersic 13, on the dust band of NGC 5128. We resolved 5 sources in the southern cluster and 4 sources in the northern one. The high U luminosity of these stars (-9.3 < MF336W < -7.8) added to the previously detected WR features in the integrated spectra of the clusters suggest we are identifying the most massive stars of the clusters, with O or WR spectral types, whose masses can even reach 120 M⊙. We have estimated their ages in t ≤ 6 × 10 6 yr for comparison with two different set of isochrones, which is consistent with an scenario where the clusters form a binary pair that would merge in a short timescale.

KW - Galaxies: individual: NGC 5128

KW - Galaxies: star clusters

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