Detectability of High Redshift Ellipticals in the Hubble Deep Field

Details Detectability of High Redshift Ellipticals in the Hubble Deep Field Detectability of High Redshift Ellipticals in the Hubble Deep Field

1997-04-17

arxiv.org/abs/astro-ph/9704173v2

Astronomy and Astrophysics

Astrophysics

AAS LaTex, 11 pages, 1 table, 1 figure, some corrections and clarifications, accepted for publication in ApJL

Scientific paper

Relatively few intensively star-forming galaxies at redshifts z>2.5 have been found in the Hubble Deep Field (HDF). This has been interpreted to imply a low space density of elliptical galaxies at high z, possibly due to a late (z<2.5) epoch of formation, or to dust obscuration of the ellipticals that are forming at z~3. I use HST UV (2300 Ang) images of 25 local early-type galaxies to investigate a third option, that ellipticals formed at z>4.5, and were fading passively by 24.5, and have faded passively to their present brightnesses at UV wavelengths, they would generally be below the HDF detection limits in any of its bands at z>2.5. Quiescent z ~ 3 ellipticals, if they exist, should turn up in sufficiently deep IR images.

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