Mid-infrared selection of brown dwarfs and high-redshift quasars

Daniel Stern; J. Davy Kirkpatrick; Lori E. Allen; Chao Bian; Andrew Blain; Kate Brand; Mark Brodwin; Michael J.I. Brown; Richard Cool; Vandana Desai; Arjun Dey; Peter Eisenhardt; Anthony Gonzalez; Buell T. Jannuzi; Karin Menendez-Delmestre; Howard A. Smith; B. T. Soifer; Glenn P. Tiede; E. Wright

doi:10.1086/516833

Mid-infrared selection of brown dwarfs and high-redshift quasars

Daniel Stern, J. Davy Kirkpatrick, Lori E. Allen, Chao Bian, Andrew Blain, Kate Brand, Mark Brodwin, Michael J.I. Brown, Richard Cool, Vandana Desai, Arjun Dey, Peter Eisenhardt, Anthony Gonzalez, Buell T. Jannuzi, Karin Menendez-Delmestre, Howard A. Smith, B. T. Soifer, Glenn P. Tiede, E. Wright

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47 Scopus citations

Abstract

We discuss color selection of rare objects in a wide-field multiband survey spanning from the optical to the midinfrared. Simple color criteria simultaneously identify and distinguish two of the most sought after astrophysical sources: the coolest brown dwarfs and the most distant quasars. We present spectroscopically confirmed examples of each class identified in the IRAC Shallow Survey of the Boötes field of the NOAO Deep Wide-Field Survey. IRAC J142950.8+333011 is aT4.5 brown dwarf at a distance of approximately 30-40 pc, and IRAC J142738.5+331242 is a radio-loud quasar at redshift z = 6.12. Our selection criteria identify a total of four candidates over 8 deg2 of the Boötes field. The other two candidates are both confirmed 5.5 < z < 6 quasars, previously reported by Cool et al. (2006). We discuss the implications of these discoveries and conclude that there are excellent prospects for extending such searches to cooler brown dwarfs and higher redshift quasars.

Original language	English (US)
Pages (from-to)	677-685
Number of pages	9
Journal	Astrophysical Journal
Volume	663
Issue number	1 I
DOIs	https://doi.org/10.1086/516833
State	Published - Jul 1 2007
Externally published	Yes

Keywords

Galaxies: high-redshift
Stars: low-mass, brown dwarfs
Surveys

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/516833

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Stern, D., Kirkpatrick, J. D., Allen, L. E., Bian, C., Blain, A., Brand, K., Brodwin, M., Brown, M. J. I., Cool, R., Desai, V., Dey, A., Eisenhardt, P., Gonzalez, A., Jannuzi, B. T., Menendez-Delmestre, K., Smith, H. A., Soifer, B. T., Tiede, G. P., & Wright, E. (2007). Mid-infrared selection of brown dwarfs and high-redshift quasars. Astrophysical Journal, 663(1 I), 677-685. https://doi.org/10.1086/516833

Stern, D, Kirkpatrick, JD, Allen, LE, Bian, C, Blain, A, Brand, K, Brodwin, M, Brown, MJI, Cool, R, Desai, V, Dey, A, Eisenhardt, P, Gonzalez, A, Jannuzi, BT, Menendez-Delmestre, K, Smith, HA, Soifer, BT, Tiede, GP & Wright, E 2007, 'Mid-infrared selection of brown dwarfs and high-redshift quasars', Astrophysical Journal, vol. 663, no. 1 I, pp. 677-685. https://doi.org/10.1086/516833

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title = "Mid-infrared selection of brown dwarfs and high-redshift quasars",

abstract = "We discuss color selection of rare objects in a wide-field multiband survey spanning from the optical to the midinfrared. Simple color criteria simultaneously identify and distinguish two of the most sought after astrophysical sources: the coolest brown dwarfs and the most distant quasars. We present spectroscopically confirmed examples of each class identified in the IRAC Shallow Survey of the Bo{\"o}tes field of the NOAO Deep Wide-Field Survey. IRAC J142950.8+333011 is aT4.5 brown dwarf at a distance of approximately 30-40 pc, and IRAC J142738.5+331242 is a radio-loud quasar at redshift z = 6.12. Our selection criteria identify a total of four candidates over 8 deg2 of the Bo{\"o}tes field. The other two candidates are both confirmed 5.5 < z < 6 quasars, previously reported by Cool et al. (2006). We discuss the implications of these discoveries and conclude that there are excellent prospects for extending such searches to cooler brown dwarfs and higher redshift quasars.",

keywords = "Galaxies: high-redshift, Stars: low-mass, brown dwarfs, Surveys",

author = "Daniel Stern and Kirkpatrick, {J. Davy} and Allen, {Lori E.} and Chao Bian and Andrew Blain and Kate Brand and Mark Brodwin and Brown, {Michael J.I.} and Richard Cool and Vandana Desai and Arjun Dey and Peter Eisenhardt and Anthony Gonzalez and Jannuzi, {Buell T.} and Karin Menendez-Delmestre and Smith, {Howard A.} and Soifer, {B. T.} and Tiede, {Glenn P.} and E. Wright",

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doi = "10.1086/516833",

language = "English (US)",

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pages = "677--685",

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TY - JOUR

T1 - Mid-infrared selection of brown dwarfs and high-redshift quasars

AU - Stern, Daniel

AU - Kirkpatrick, J. Davy

AU - Allen, Lori E.

AU - Bian, Chao

AU - Blain, Andrew

AU - Brand, Kate

AU - Brodwin, Mark

AU - Brown, Michael J.I.

AU - Cool, Richard

AU - Desai, Vandana

AU - Dey, Arjun

AU - Eisenhardt, Peter

AU - Gonzalez, Anthony

AU - Jannuzi, Buell T.

AU - Menendez-Delmestre, Karin

AU - Smith, Howard A.

AU - Soifer, B. T.

AU - Tiede, Glenn P.

AU - Wright, E.

PY - 2007/7/1

Y1 - 2007/7/1

N2 - We discuss color selection of rare objects in a wide-field multiband survey spanning from the optical to the midinfrared. Simple color criteria simultaneously identify and distinguish two of the most sought after astrophysical sources: the coolest brown dwarfs and the most distant quasars. We present spectroscopically confirmed examples of each class identified in the IRAC Shallow Survey of the Boötes field of the NOAO Deep Wide-Field Survey. IRAC J142950.8+333011 is aT4.5 brown dwarf at a distance of approximately 30-40 pc, and IRAC J142738.5+331242 is a radio-loud quasar at redshift z = 6.12. Our selection criteria identify a total of four candidates over 8 deg2 of the Boötes field. The other two candidates are both confirmed 5.5 < z < 6 quasars, previously reported by Cool et al. (2006). We discuss the implications of these discoveries and conclude that there are excellent prospects for extending such searches to cooler brown dwarfs and higher redshift quasars.

AB - We discuss color selection of rare objects in a wide-field multiband survey spanning from the optical to the midinfrared. Simple color criteria simultaneously identify and distinguish two of the most sought after astrophysical sources: the coolest brown dwarfs and the most distant quasars. We present spectroscopically confirmed examples of each class identified in the IRAC Shallow Survey of the Boötes field of the NOAO Deep Wide-Field Survey. IRAC J142950.8+333011 is aT4.5 brown dwarf at a distance of approximately 30-40 pc, and IRAC J142738.5+331242 is a radio-loud quasar at redshift z = 6.12. Our selection criteria identify a total of four candidates over 8 deg2 of the Boötes field. The other two candidates are both confirmed 5.5 < z < 6 quasars, previously reported by Cool et al. (2006). We discuss the implications of these discoveries and conclude that there are excellent prospects for extending such searches to cooler brown dwarfs and higher redshift quasars.

KW - Galaxies: high-redshift

KW - Stars: low-mass, brown dwarfs

KW - Surveys

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EP - 685

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 I

ER -

Mid-infrared selection of brown dwarfs and high-redshift quasars

Abstract

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