Surface density of extremely red objects with R - J ≥ 5

A. Hempel, T. M. Herbst, D. J. Thompson

Resultado de la investigación: Article

Resumen

We present the results of a wide-field survey for extremely red objects (EROs), based on J and R band imaging. The survey covers 2.89 deg2, consisting of 50 single fields, each approximately 210 arcmin2 in size. This survey provides a sample of 60 extended objects with a colour of R - J ≥ 5 and J band magnitudes more than 10σ above background (18 mag ≤ J ≤ 20mag). Thirty five of these objects have been detected in both J and R-band. We derive a surface density for such EROs of 5.7 ± 0.1 × 10-3 arcmin-2, which is about seven times lower than for galaxies with R - K ≥ 6. Stellar population models suggest that these EROs are massive galaxies with an old stellar population in a redshift range of 1.4 ≤ z ≤ 3.0. For this scenario, we estimate the co-moving volume density to be (9.57 ± 1.24) × 10-6 Mpc-3.

Idioma originalEnglish
Páginas (desde-hasta)831-839
Número de páginas9
PublicaciónAstronomy and Astrophysics
Volumen443
N.º3
DOI
EstadoPublished - dic 2005

Huella dactilar

galaxies
field survey
color
estimates

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Citar esto

Hempel, A. ; Herbst, T. M. ; Thompson, D. J. / Surface density of extremely red objects with R - J ≥ 5. En: Astronomy and Astrophysics. 2005 ; Vol. 443, N.º 3. pp. 831-839.
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abstract = "We present the results of a wide-field survey for extremely red objects (EROs), based on J and R band imaging. The survey covers 2.89 deg2, consisting of 50 single fields, each approximately 210 arcmin2 in size. This survey provides a sample of 60 extended objects with a colour of R - J ≥ 5 and J band magnitudes more than 10σ above background (18 mag ≤ J ≤ 20mag). Thirty five of these objects have been detected in both J and R-band. We derive a surface density for such EROs of 5.7 ± 0.1 × 10-3 arcmin-2, which is about seven times lower than for galaxies with R - K ≥ 6. Stellar population models suggest that these EROs are massive galaxies with an old stellar population in a redshift range of 1.4 ≤ z ≤ 3.0. For this scenario, we estimate the co-moving volume density to be (9.57 ± 1.24) × 10-6 Mpc-3.",
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Surface density of extremely red objects with R - J ≥ 5. / Hempel, A.; Herbst, T. M.; Thompson, D. J.

En: Astronomy and Astrophysics, Vol. 443, N.º 3, 12.2005, p. 831-839.

Resultado de la investigación: Article

TY - JOUR

T1 - Surface density of extremely red objects with R - J ≥ 5

AU - Hempel, A.

AU - Herbst, T. M.

AU - Thompson, D. J.

PY - 2005/12

Y1 - 2005/12

N2 - We present the results of a wide-field survey for extremely red objects (EROs), based on J and R band imaging. The survey covers 2.89 deg2, consisting of 50 single fields, each approximately 210 arcmin2 in size. This survey provides a sample of 60 extended objects with a colour of R - J ≥ 5 and J band magnitudes more than 10σ above background (18 mag ≤ J ≤ 20mag). Thirty five of these objects have been detected in both J and R-band. We derive a surface density for such EROs of 5.7 ± 0.1 × 10-3 arcmin-2, which is about seven times lower than for galaxies with R - K ≥ 6. Stellar population models suggest that these EROs are massive galaxies with an old stellar population in a redshift range of 1.4 ≤ z ≤ 3.0. For this scenario, we estimate the co-moving volume density to be (9.57 ± 1.24) × 10-6 Mpc-3.

AB - We present the results of a wide-field survey for extremely red objects (EROs), based on J and R band imaging. The survey covers 2.89 deg2, consisting of 50 single fields, each approximately 210 arcmin2 in size. This survey provides a sample of 60 extended objects with a colour of R - J ≥ 5 and J band magnitudes more than 10σ above background (18 mag ≤ J ≤ 20mag). Thirty five of these objects have been detected in both J and R-band. We derive a surface density for such EROs of 5.7 ± 0.1 × 10-3 arcmin-2, which is about seven times lower than for galaxies with R - K ≥ 6. Stellar population models suggest that these EROs are massive galaxies with an old stellar population in a redshift range of 1.4 ≤ z ≤ 3.0. For this scenario, we estimate the co-moving volume density to be (9.57 ± 1.24) × 10-6 Mpc-3.

KW - Galaxies: elliptical and lenticular, cD

KW - Galaxies: high-redshift

KW - Galaxy: evolution

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