NICMOS imaging of the dusty microjansky radio source VLA J123642+621331 at z = 4.424

I. Waddington, Rogier Windhorst, S. H. Cohen, R. B. Partridge, H. Spinrad, D. Stern

Research output: Contribution to journalArticle

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Abstract

We present the discovery of a radio galaxy at a likely redshift of z = 4.424 in one of the flanking fields of the Hubble Deep Field (HDF). Radio observations with the Very Large Array and MERLIN centered on the HDF yielded a complete sample of microjansky radio sources, of which about 20% have no optical counterpart to I≤25 mag. In this Letter, we address the possible nature of one of these sources through deep Hubble Space Telescope near-infrared camera and multiobject spectrometer (NICMOS) images in the F110W (J110) and F160W (H160) filters. VLA J123642+621331 has a single emission line at 6595 Å, which we identify with Lyα at z = 4.424. We argue that this faint (H160 = 23.9 mag), compact (re≃0″.2), red (I214-K = 2.0) object is most likely a dusty, star-forming galaxy with an embedded active nucleus.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume526
Issue number2 PART 2
StatePublished - Dec 1 1999

Fingerprint

Very Large Array (VLA)
radio observation
imaging spectrometers
radio galaxies
Hubble Space Telescope
near infrared
spectrometer
cameras
spectrometers
radio
galaxies
filters
stars
nuclei
filter

Keywords

  • Galaxies: active
  • Galaxies: evolution
  • Galaxies: starburst

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Waddington, I., Windhorst, R., Cohen, S. H., Partridge, R. B., Spinrad, H., & Stern, D. (1999). NICMOS imaging of the dusty microjansky radio source VLA J123642+621331 at z = 4.424. Astrophysical Journal, 526(2 PART 2).

NICMOS imaging of the dusty microjansky radio source VLA J123642+621331 at z = 4.424. / Waddington, I.; Windhorst, Rogier; Cohen, S. H.; Partridge, R. B.; Spinrad, H.; Stern, D.

In: Astrophysical Journal, Vol. 526, No. 2 PART 2, 01.12.1999.

Research output: Contribution to journalArticle

Waddington, I, Windhorst, R, Cohen, SH, Partridge, RB, Spinrad, H & Stern, D 1999, 'NICMOS imaging of the dusty microjansky radio source VLA J123642+621331 at z = 4.424', Astrophysical Journal, vol. 526, no. 2 PART 2.
Waddington I, Windhorst R, Cohen SH, Partridge RB, Spinrad H, Stern D. NICMOS imaging of the dusty microjansky radio source VLA J123642+621331 at z = 4.424. Astrophysical Journal. 1999 Dec 1;526(2 PART 2).
Waddington, I. ; Windhorst, Rogier ; Cohen, S. H. ; Partridge, R. B. ; Spinrad, H. ; Stern, D. / NICMOS imaging of the dusty microjansky radio source VLA J123642+621331 at z = 4.424. In: Astrophysical Journal. 1999 ; Vol. 526, No. 2 PART 2.
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