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

I. Waddington; R. A. Windhorst; S. H. Cohen; R. B. Partridge; H. Spinrad; D. Stern

doi:10.1086/312375

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

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

Physics

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5 Scopus citations

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 (r_e≃0″.2), red (I₂₁₄-K = 2.0) object is most likely a dusty, star-forming galaxy with an embedded active nucleus.

Original language	English (US)
Pages (from-to)	L77-L80
Journal	Astrophysical Journal
Volume	526
Issue number	2 PART 2
DOIs	https://doi.org/10.1086/312375
State	Published - Dec 1 1999

Keywords

Galaxies: active
Galaxies: evolution
Galaxies: starburst

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/312375

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

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 {\AA}, 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.",

keywords = "Galaxies: active, Galaxies: evolution, Galaxies: starburst",

author = "I. Waddington and Windhorst, {R. A.} and Cohen, {S. H.} and Partridge, {R. B.} and H. Spinrad and D. Stern",

year = "1999",

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doi = "10.1086/312375",

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T1 - NICMOS imaging of the dusty microjansky radio source VLA J123642+621331 at z = 4.424

AU - Waddington, I.

AU - Windhorst, R. A.

AU - Cohen, S. H.

AU - Partridge, R. B.

AU - Spinrad, H.

AU - Stern, D.

PY - 1999/12/1

Y1 - 1999/12/1

N2 - 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.

AB - 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.

KW - Galaxies: active

KW - Galaxies: evolution

KW - Galaxies: starburst

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ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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