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

Access to Document

10.1088/0004-6256/139/6/2455

Cite this

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",

publisher = "American Astronomical Society",

number = "6",

}

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 -

Ultracool field brown dwarf candidates selected at 4.5 microm

Abstract

Access to Document

Other files and links

Cite this