L dwarfs found in sloan digital sky survey commissioning data. II. Hobby-Eberly Telescope observations

Donald P. Schneider; Gillian R. Knapp; Suzanne L. Hawley; Kevin R. Covey; Xiaohui Fan; Lawrence W. Ramsey; Gordon T. Richards; Michael A. Strauss; James E. Gunn; Gary J. Hill; Phillip J. MacQueen; Mark T. Adams; Grant M. Hill; Željko Ivezić; Robert H. Lupton; Jeffrey R. Pier; David H. Saxe; Matthew Shetrone; Joseph R. Tufts; Marsha J. Wolf; J. Brinkmann; István Csabai; G. S. Hennessy; Donald G. York

doi:10.1086/338095

L dwarfs found in sloan digital sky survey commissioning data. II. Hobby-Eberly Telescope observations

Donald P. Schneider, Gillian R. Knapp, Suzanne L. Hawley, Kevin R. Covey, Xiaohui Fan, Lawrence W. Ramsey, Gordon T. Richards, Michael A. Strauss, James E. Gunn, Gary J. Hill, Phillip J. MacQueen, Mark T. Adams, Grant M. Hill, Željko Ivezić, Robert H. Lupton, Jeffrey R. Pier, David H. Saxe, Matthew Shetrone, Joseph R. Tufts, Marsha J. WolfJ. Brinkmann, István Csabai, G. S. Hennessy, Donald G. York

Research output: Contribution to journal › Review article › peer-review

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Abstract

Low-dispersion optical spectra have been obtained with the Hobby-Eberly Telescope of 22 very red objects found in early imaging data from the Sloan Digital Sky Survey (SDSS). The objects are assigned spectral types on the Two Micron All Sky Survey (2MASS) system and are found to range from late M to late L. The red and near-infrared colors from SDSS and 2MASS correlate closely with each other, and most of the colors are closely related to spectral type in this range; the exception is the i*-z* color, which appears to be independent of spectral type between about M7 and L4. The spectra suggest that this independence is due to the disappearance of the TiO and VO absorption in the i band for later spectral types, the presence of strong Na I and K I absorption in the i band, and the gradual disappearance of the 8400 Å absorption of TiO and FeH in the z band.

Original language	English (US)
Pages (from-to)	458-465
Number of pages	8
Journal	Astronomical Journal
Volume	123
Issue number	1 1753
DOIs	https://doi.org/10.1086/338095
State	Published - Jan 2002

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Stars: low-mass, brown dwarfs
Surveys

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10.1086/338095

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Schneider, D. P., Knapp, G. R., Hawley, S. L., Covey, K. R., Fan, X., Ramsey, L. W., Richards, G. T., Strauss, M. A., Gunn, J. E., Hill, G. J., MacQueen, P. J., Adams, M. T., Hill, G. M., Ivezić, Ž., Lupton, R. H., Pier, J. R., Saxe, D. H., Shetrone, M., Tufts, J. R., ... York, D. G. (2002). L dwarfs found in sloan digital sky survey commissioning data. II. Hobby-Eberly Telescope observations. Astronomical Journal, 123(1 1753), 458-465. https://doi.org/10.1086/338095

@article{e2e66300e8f54b4984f8e198f777f864,

title = "L dwarfs found in sloan digital sky survey commissioning data. II. Hobby-Eberly Telescope observations",

abstract = "Low-dispersion optical spectra have been obtained with the Hobby-Eberly Telescope of 22 very red objects found in early imaging data from the Sloan Digital Sky Survey (SDSS). The objects are assigned spectral types on the Two Micron All Sky Survey (2MASS) system and are found to range from late M to late L. The red and near-infrared colors from SDSS and 2MASS correlate closely with each other, and most of the colors are closely related to spectral type in this range; the exception is the i*-z* color, which appears to be independent of spectral type between about M7 and L4. The spectra suggest that this independence is due to the disappearance of the TiO and VO absorption in the i band for later spectral types, the presence of strong Na I and K I absorption in the i band, and the gradual disappearance of the 8400 {\AA} absorption of TiO and FeH in the z band.",

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

author = "Schneider, {Donald P.} and Knapp, {Gillian R.} and Hawley, {Suzanne L.} and Covey, {Kevin R.} and Xiaohui Fan and Ramsey, {Lawrence W.} and Richards, {Gordon T.} and Strauss, {Michael A.} and Gunn, {James E.} and Hill, {Gary J.} and MacQueen, {Phillip J.} and Adams, {Mark T.} and Hill, {Grant M.} and {\v Z}eljko Ivezi{\'c} and Lupton, {Robert H.} and Pier, {Jeffrey R.} and Saxe, {David H.} and Matthew Shetrone and Tufts, {Joseph R.} and Wolf, {Marsha J.} and J. Brinkmann and Istv{\'a}n Csabai and Hennessy, {G. S.} and York, {Donald G.}",

year = "2002",

month = jan,

doi = "10.1086/338095",

language = "English (US)",

volume = "123",

pages = "458--465",

journal = "Astronomical Journal",

issn = "0004-6256",

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number = "1 1753",

}

Schneider, DP, Knapp, GR, Hawley, SL, Covey, KR, Fan, X, Ramsey, LW, Richards, GT, Strauss, MA, Gunn, JE, Hill, GJ, MacQueen, PJ, Adams, MT, Hill, GM, Ivezić, Ž, Lupton, RH, Pier, JR, Saxe, DH, Shetrone, M, Tufts, JR, Wolf, MJ, Brinkmann, J, Csabai, I, Hennessy, GS & York, DG 2002, 'L dwarfs found in sloan digital sky survey commissioning data. II. Hobby-Eberly Telescope observations', Astronomical Journal, vol. 123, no. 1 1753, pp. 458-465. https://doi.org/10.1086/338095

TY - JOUR

T1 - L dwarfs found in sloan digital sky survey commissioning data. II. Hobby-Eberly Telescope observations

AU - Schneider, Donald P.

AU - Knapp, Gillian R.

AU - Hawley, Suzanne L.

AU - Covey, Kevin R.

AU - Fan, Xiaohui

AU - Ramsey, Lawrence W.

AU - Richards, Gordon T.

AU - Strauss, Michael A.

AU - Gunn, James E.

AU - Hill, Gary J.

AU - MacQueen, Phillip J.

AU - Adams, Mark T.

AU - Hill, Grant M.

AU - Ivezić, Željko

AU - Lupton, Robert H.

AU - Pier, Jeffrey R.

AU - Saxe, David H.

AU - Shetrone, Matthew

AU - Tufts, Joseph R.

AU - Wolf, Marsha J.

AU - Brinkmann, J.

AU - Csabai, István

AU - Hennessy, G. S.

AU - York, Donald G.

PY - 2002/1

Y1 - 2002/1

N2 - Low-dispersion optical spectra have been obtained with the Hobby-Eberly Telescope of 22 very red objects found in early imaging data from the Sloan Digital Sky Survey (SDSS). The objects are assigned spectral types on the Two Micron All Sky Survey (2MASS) system and are found to range from late M to late L. The red and near-infrared colors from SDSS and 2MASS correlate closely with each other, and most of the colors are closely related to spectral type in this range; the exception is the i*-z* color, which appears to be independent of spectral type between about M7 and L4. The spectra suggest that this independence is due to the disappearance of the TiO and VO absorption in the i band for later spectral types, the presence of strong Na I and K I absorption in the i band, and the gradual disappearance of the 8400 Å absorption of TiO and FeH in the z band.

AB - Low-dispersion optical spectra have been obtained with the Hobby-Eberly Telescope of 22 very red objects found in early imaging data from the Sloan Digital Sky Survey (SDSS). The objects are assigned spectral types on the Two Micron All Sky Survey (2MASS) system and are found to range from late M to late L. The red and near-infrared colors from SDSS and 2MASS correlate closely with each other, and most of the colors are closely related to spectral type in this range; the exception is the i*-z* color, which appears to be independent of spectral type between about M7 and L4. The spectra suggest that this independence is due to the disappearance of the TiO and VO absorption in the i band for later spectral types, the presence of strong Na I and K I absorption in the i band, and the gradual disappearance of the 8400 Å absorption of TiO and FeH in the z band.

KW - Stars: low-mass, brown dwarfs

KW - Surveys

UR - http://www.scopus.com/inward/record.url?scp=0009671506&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0009671506&partnerID=8YFLogxK

U2 - 10.1086/338095

DO - 10.1086/338095

M3 - Review article

AN - SCOPUS:0009671506

SN - 0004-6256

VL - 123

SP - 458

EP - 465

JO - Astronomical Journal

JF - Astronomical Journal

IS - 1 1753

ER -

L dwarfs found in sloan digital sky survey commissioning data. II. Hobby-Eberly Telescope observations

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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