Ultracool field brown dwarf candidates selected at 4.5 microm

P Eisenhardt; Roger L Griffith; Daniel Stern; E L Wright; M L N Ashby; Mark Brodwin; Michael Brown; Shane Bussmann; Arjun Dey; A M Ghez; Eilat Glikman; Anthony H Gonzalez; J Davy Kirkpatrick; Quinn Konopacky; A Mainzer; David Vollbach; Shelley A Wright

doi:10.1088/0004-6256/139/6/2455

Ultracool field brown dwarf candidates selected at 4.5 microm

P Eisenhardt, Roger L Griffith, Daniel Stern, E L Wright, M L N Ashby, Mark Brodwin, Michael Brown, Shane Bussmann, Arjun Dey, A M Ghez, Eilat Glikman, Anthony H Gonzalez, J Davy Kirkpatrick, Quinn Konopacky, A Mainzer, David Vollbach, Shelley A Wright

Research output: Contribution to journal › Article › Research › peer-review

16 Citations (Scopus)

Abstract

We have identified a sample of cool field brown dwarf candidates using IRAC data from the Spitzer Deep, Wide-Field Survey (SDWFS). The candidates were selected from 400,000 SDWFS sources with [4.5] = 1.5 and [4.5] - [8.0] 70 pc. The reddest brown dwarf candidate (SDWFS J143356.62+351849.2) has [3.6] - [4.5] = 2.24 and H - [4.5] > 5.7, redder than any published brown dwarf in these colors, and may be the first example of the elusive Y-dwarf spectral class. Models from Burrows et al. predict that larger numbers of cool brown dwarfs should be found for a Chabrier mass function. Suppressing the model [4.5] flux by a factor of 2, as indicated by previous work, brings the Burrows models and observations into reasonable agreement. The recently launched Wide-field Infrared Survey Explorer will probe a volume similar to 40x larger and should find hundreds of brown dwarfs cooler than T7.

Original language	English
Pages (from-to)	2455 - 2464
Number of pages	9
Journal	The Astronomical Journal
Volume	139
Issue number	6
DOIs	https://doi.org/10.1088/0004-6256/139/6/2455
Publication status	Published - 2010

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Eisenhardt, P., Griffith, R. L., Stern, D., Wright, E. L., Ashby, M. L. N., Brodwin, M., Brown, M., Bussmann, S., Dey, A., Ghez, A. M., Glikman, E., Gonzalez, A. H., Kirkpatrick, J. D., Konopacky, Q., Mainzer, A., Vollbach, D., & Wright, S. A. (2010). Ultracool field brown dwarf candidates selected at 4.5 microm. The Astronomical Journal, 139(6), 2455 - 2464. https://doi.org/10.1088/0004-6256/139/6/2455

Eisenhardt, P ; Griffith, Roger L ; Stern, Daniel ; Wright, E L ; Ashby, M L N ; Brodwin, Mark ; Brown, Michael ; Bussmann, Shane ; Dey, Arjun ; Ghez, A M ; Glikman, Eilat ; Gonzalez, Anthony H ; Kirkpatrick, J Davy ; Konopacky, Quinn ; Mainzer, A ; Vollbach, David ; Wright, Shelley A. / Ultracool field brown dwarf candidates selected at 4.5 microm. In: The Astronomical Journal. 2010 ; Vol. 139, No. 6. pp. 2455 - 2464.

@article{3f50ccaec77d4025ab294dc8a02a8e0a,

title = "Ultracool field brown dwarf candidates selected at 4.5 microm",

abstract = "We have identified a sample of cool field brown dwarf candidates using IRAC data from the Spitzer Deep, Wide-Field Survey (SDWFS). The candidates were selected from 400,000 SDWFS sources with [4.5] = 1.5 and [4.5] - [8.0] 70 pc. The reddest brown dwarf candidate (SDWFS J143356.62+351849.2) has [3.6] - [4.5] = 2.24 and H - [4.5] > 5.7, redder than any published brown dwarf in these colors, and may be the first example of the elusive Y-dwarf spectral class. Models from Burrows et al. predict that larger numbers of cool brown dwarfs should be found for a Chabrier mass function. Suppressing the model [4.5] flux by a factor of 2, as indicated by previous work, brings the Burrows models and observations into reasonable agreement. The recently launched Wide-field Infrared Survey Explorer will probe a volume similar to 40x larger and should find hundreds of brown dwarfs cooler than T7.",

author = "P Eisenhardt and Griffith, {Roger L} and Daniel Stern and Wright, {E L} and Ashby, {M L N} and Mark Brodwin and Michael Brown and Shane Bussmann and Arjun Dey and Ghez, {A M} and Eilat Glikman and Gonzalez, {Anthony H} and Kirkpatrick, {J Davy} and Quinn Konopacky and A Mainzer and David Vollbach and Wright, {Shelley A}",

year = "2010",

doi = "10.1088/0004-6256/139/6/2455",

language = "English",

volume = "139",

pages = "2455 -- 2464",

journal = "The Astronomical Journal",

issn = "0004-6256",

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Eisenhardt, P, Griffith, RL, Stern, D, Wright, EL, Ashby, MLN, Brodwin, M, Brown, M, Bussmann, S, Dey, A, Ghez, AM, Glikman, E, Gonzalez, AH, Kirkpatrick, JD, Konopacky, Q, Mainzer, A, Vollbach, D & Wright, SA 2010, 'Ultracool field brown dwarf candidates selected at 4.5 microm', The Astronomical Journal, vol. 139, no. 6, pp. 2455 - 2464. https://doi.org/10.1088/0004-6256/139/6/2455

Ultracool field brown dwarf candidates selected at 4.5 microm. / Eisenhardt, P; Griffith, Roger L; Stern, Daniel; Wright, E L; Ashby, M L N; Brodwin, Mark; Brown, Michael; Bussmann, Shane; Dey, Arjun; Ghez, A M; Glikman, Eilat; Gonzalez, Anthony H; Kirkpatrick, J Davy; Konopacky, Quinn; Mainzer, A; Vollbach, David; Wright, Shelley A.

In: The Astronomical Journal, Vol. 139, No. 6, 2010, p. 2455 - 2464.

Research output: Contribution to journal › Article › Research › peer-review

TY - JOUR

T1 - Ultracool field brown dwarf candidates selected at 4.5 microm

AU - Eisenhardt, P

AU - Griffith, Roger L

AU - Stern, Daniel

AU - Wright, E L

AU - Ashby, M L N

AU - Brodwin, Mark

AU - Brown, Michael

AU - Bussmann, Shane

AU - Dey, Arjun

AU - Ghez, A M

AU - Glikman, Eilat

AU - Gonzalez, Anthony H

AU - Kirkpatrick, J Davy

AU - Konopacky, Quinn

AU - Mainzer, A

AU - Vollbach, David

AU - Wright, Shelley A

PY - 2010

Y1 - 2010

N2 - We have identified a sample of cool field brown dwarf candidates using IRAC data from the Spitzer Deep, Wide-Field Survey (SDWFS). The candidates were selected from 400,000 SDWFS sources with [4.5] = 1.5 and [4.5] - [8.0] 70 pc. The reddest brown dwarf candidate (SDWFS J143356.62+351849.2) has [3.6] - [4.5] = 2.24 and H - [4.5] > 5.7, redder than any published brown dwarf in these colors, and may be the first example of the elusive Y-dwarf spectral class. Models from Burrows et al. predict that larger numbers of cool brown dwarfs should be found for a Chabrier mass function. Suppressing the model [4.5] flux by a factor of 2, as indicated by previous work, brings the Burrows models and observations into reasonable agreement. The recently launched Wide-field Infrared Survey Explorer will probe a volume similar to 40x larger and should find hundreds of brown dwarfs cooler than T7.

AB - We have identified a sample of cool field brown dwarf candidates using IRAC data from the Spitzer Deep, Wide-Field Survey (SDWFS). The candidates were selected from 400,000 SDWFS sources with [4.5] = 1.5 and [4.5] - [8.0] 70 pc. The reddest brown dwarf candidate (SDWFS J143356.62+351849.2) has [3.6] - [4.5] = 2.24 and H - [4.5] > 5.7, redder than any published brown dwarf in these colors, and may be the first example of the elusive Y-dwarf spectral class. Models from Burrows et al. predict that larger numbers of cool brown dwarfs should be found for a Chabrier mass function. Suppressing the model [4.5] flux by a factor of 2, as indicated by previous work, brings the Burrows models and observations into reasonable agreement. The recently launched Wide-field Infrared Survey Explorer will probe a volume similar to 40x larger and should find hundreds of brown dwarfs cooler than T7.

UR - http://iopscience.iop.org/1538-3881/139/6/2455/pdf/1538-3881_139_6_2455.pdf

U2 - 10.1088/0004-6256/139/6/2455

DO - 10.1088/0004-6256/139/6/2455

M3 - Article

VL - 139

SP - 2455

EP - 2464

JO - The Astronomical Journal

JF - The Astronomical Journal

SN - 0004-6256

IS - 6

ER -