Stellar populations in NGC 5128 with the VLT: Evidence for recent star formation

M. Rejkuba, D. Minniti, D. R. Silva, T. R. Bedding

Resultado de la investigación: Article

43 Citas (Scopus)

Resumen

We resolve stars of the nearest giant elliptical galaxy NGC 5128 using VLT with FORS1 and ISAAC. We construct deep U, V and Ks color-magnitude and color-color diagrams in two different halo fields (in the halo and in the north-eastern diffuse shell). In the outer, shell field, at ∼14 kpc from the center of the galaxy, there is a significant recent star formation with stars as young as 10 Myr, approximately aligned with the prominent radio and X-ray jet from the nucleus of the host AGN. Ionized gas filaments are evident in ultraviolet images near the area where neutral HI and CO molecular gas was previously observed. The underlying stellar population of the halo of the giant elliptical is predominantly old with a very broad metallicity distribution. The presence of an extended giant branch reaching Mbol = -5 mag suggests the existence of a significant intermediate-age AGB population in the halo of this galaxy.

Idioma originalEnglish
Páginas (desde-hasta)781-797
Número de páginas17
PublicaciónAstronomy and Astrophysics
Volumen379
N.º3
DOI
EstadoPublished - 1 ene 2001

Huella dactilar

star formation
halos
shell
galaxies
color-color diagram
gas
stars
elliptical galaxies
ionized gases
molecular gases
diagram
radio
metallicity
filaments
color
nuclei
x rays
distribution
young

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Citar esto

Rejkuba, M. ; Minniti, D. ; Silva, D. R. ; Bedding, T. R. / Stellar populations in NGC 5128 with the VLT : Evidence for recent star formation. En: Astronomy and Astrophysics. 2001 ; Vol. 379, N.º 3. pp. 781-797.
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abstract = "We resolve stars of the nearest giant elliptical galaxy NGC 5128 using VLT with FORS1 and ISAAC. We construct deep U, V and Ks color-magnitude and color-color diagrams in two different halo fields (in the halo and in the north-eastern diffuse shell). In the outer, shell field, at ∼14 kpc from the center of the galaxy, there is a significant recent star formation with stars as young as 10 Myr, approximately aligned with the prominent radio and X-ray jet from the nucleus of the host AGN. Ionized gas filaments are evident in ultraviolet images near the area where neutral HI and CO molecular gas was previously observed. The underlying stellar population of the halo of the giant elliptical is predominantly old with a very broad metallicity distribution. The presence of an extended giant branch reaching Mbol = -5 mag suggests the existence of a significant intermediate-age AGB population in the halo of this galaxy.",
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Stellar populations in NGC 5128 with the VLT : Evidence for recent star formation. / Rejkuba, M.; Minniti, D.; Silva, D. R.; Bedding, T. R.

En: Astronomy and Astrophysics, Vol. 379, N.º 3, 01.01.2001, p. 781-797.

Resultado de la investigación: Article

TY - JOUR

T1 - Stellar populations in NGC 5128 with the VLT

T2 - Evidence for recent star formation

AU - Rejkuba, M.

AU - Minniti, D.

AU - Silva, D. R.

AU - Bedding, T. R.

PY - 2001/1/1

Y1 - 2001/1/1

N2 - We resolve stars of the nearest giant elliptical galaxy NGC 5128 using VLT with FORS1 and ISAAC. We construct deep U, V and Ks color-magnitude and color-color diagrams in two different halo fields (in the halo and in the north-eastern diffuse shell). In the outer, shell field, at ∼14 kpc from the center of the galaxy, there is a significant recent star formation with stars as young as 10 Myr, approximately aligned with the prominent radio and X-ray jet from the nucleus of the host AGN. Ionized gas filaments are evident in ultraviolet images near the area where neutral HI and CO molecular gas was previously observed. The underlying stellar population of the halo of the giant elliptical is predominantly old with a very broad metallicity distribution. The presence of an extended giant branch reaching Mbol = -5 mag suggests the existence of a significant intermediate-age AGB population in the halo of this galaxy.

AB - We resolve stars of the nearest giant elliptical galaxy NGC 5128 using VLT with FORS1 and ISAAC. We construct deep U, V and Ks color-magnitude and color-color diagrams in two different halo fields (in the halo and in the north-eastern diffuse shell). In the outer, shell field, at ∼14 kpc from the center of the galaxy, there is a significant recent star formation with stars as young as 10 Myr, approximately aligned with the prominent radio and X-ray jet from the nucleus of the host AGN. Ionized gas filaments are evident in ultraviolet images near the area where neutral HI and CO molecular gas was previously observed. The underlying stellar population of the halo of the giant elliptical is predominantly old with a very broad metallicity distribution. The presence of an extended giant branch reaching Mbol = -5 mag suggests the existence of a significant intermediate-age AGB population in the halo of this galaxy.

KW - Galaxies: elliptical and lenticular, cD

KW - Galaxies: individual: NGC 5128

KW - Galaxies: stellar content

KW - Stars: fundamental parameters

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DO - 10.1051/0004-6361:20011315

M3 - Article

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JO - Astronomy and Astrophysics

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