Four new T dwarfs identified in Pan-STARRS1 commissioning data

Niall R. Deacon; Michael C. Liu; Eugene A. Magnier; Brendan P. Bowler; Bertrand Goldman; Joshua A. Redstone; W. S. Burgett; K. C. Chambers; H. Flewelling; N. Kaiser; R. H. Lupton; J. S. Morgan; P. A. Price; W. E. Sweeney; J. L. Tonry; R. J. Wainscoat; C. Waters

doi:10.1088/0004-6256/142/3/77

Four new T dwarfs identified in Pan-STARRS1 commissioning data

Niall R. Deacon, Michael C. Liu, Eugene A. Magnier, Brendan P. Bowler, Bertrand Goldman, Joshua A. Redstone, W. S. Burgett, K. C. Chambers, H. Flewelling, N. Kaiser, R. H. Lupton, J. S. Morgan, P. A. Price, W. E. Sweeney, J. L. Tonry, R. J. Wainscoat, C. Waters

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Abstract

A complete well-defined sample of ultracool dwarfs is one of the key science programs of the Pan-STARRS 1 optical survey telescope (PS1). Here we combine PS1 commissioning data with the Two Micron All Sky Survey (2MASS) to conduct a proper motion search (01-20yr^-1) for nearby T dwarfs, using optical+near-IR colors to select objects for spectroscopic follow-up. The addition of sensitive far-red optical imaging from PS1 enables discovery of nearby ultracool dwarfs that cannot be identified from 2MASS data alone. We have searched 3700deg² of PS1 y-band (0.95-1.03 μm) data to y 19.5mag (AB) and J 16.5mag (Vega) and discovered four previously unknown bright T dwarfs. Three of the objects (with spectral types T1.5, T2, and T3.5) have photometric distances within 25pc and were missed by previous 2MASS searches due to more restrictive color selection criteria. The fourth object (spectral type T4.5) is more distant than 25pc and is only a single-band detection in 2MASS. We also examine the potential for completing the census of nearby ultracool objects with the PS1 3π survey.

Original language	English
Article number	77
Journal	The Astronomical Journal
Volume	142
Issue number	3
DOIs	https://doi.org/10.1088/0004-6256/142/3/77
Publication status	Published - Sept 2011

Keywords

brown dwarfs
stars: low-mass
surveys

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Deacon, N. R., Liu, M. C., Magnier, E. A., Bowler, B. P., Goldman, B., Redstone, J. A., Burgett, W. S., Chambers, K. C., Flewelling, H., Kaiser, N., Lupton, R. H., Morgan, J. S., Price, P. A., Sweeney, W. E., Tonry, J. L., Wainscoat, R. J., & Waters, C. (2011). Four new T dwarfs identified in Pan-STARRS1 commissioning data. The Astronomical Journal, 142(3), Article 77. https://doi.org/10.1088/0004-6256/142/3/77

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title = "Four new T dwarfs identified in Pan-STARRS1 commissioning data",

abstract = "A complete well-defined sample of ultracool dwarfs is one of the key science programs of the Pan-STARRS 1 optical survey telescope (PS1). Here we combine PS1 commissioning data with the Two Micron All Sky Survey (2MASS) to conduct a proper motion search (01-20yr-1) for nearby T dwarfs, using optical+near-IR colors to select objects for spectroscopic follow-up. The addition of sensitive far-red optical imaging from PS1 enables discovery of nearby ultracool dwarfs that cannot be identified from 2MASS data alone. We have searched 3700deg2 of PS1 y-band (0.95-1.03 μm) data to y 19.5mag (AB) and J 16.5mag (Vega) and discovered four previously unknown bright T dwarfs. Three of the objects (with spectral types T1.5, T2, and T3.5) have photometric distances within 25pc and were missed by previous 2MASS searches due to more restrictive color selection criteria. The fourth object (spectral type T4.5) is more distant than 25pc and is only a single-band detection in 2MASS. We also examine the potential for completing the census of nearby ultracool objects with the PS1 3π survey.",

keywords = "brown dwarfs, stars: low-mass, surveys",

author = "Deacon, {Niall R.} and Liu, {Michael C.} and Magnier, {Eugene A.} and Bowler, {Brendan P.} and Bertrand Goldman and Redstone, {Joshua A.} and Burgett, {W. S.} and Chambers, {K. C.} and H. Flewelling and N. Kaiser and Lupton, {R. H.} and Morgan, {J. S.} and Price, {P. A.} and Sweeney, {W. E.} and Tonry, {J. L.} and Wainscoat, {R. J.} and C. Waters",

year = "2011",

month = sep,

doi = "10.1088/0004-6256/142/3/77",

language = "English",

volume = "142",

journal = "The Astronomical Journal",

issn = "0004-6256",

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Deacon, NR, Liu, MC, Magnier, EA, Bowler, BP, Goldman, B, Redstone, JA, Burgett, WS, Chambers, KC, Flewelling, H, Kaiser, N, Lupton, RH, Morgan, JS, Price, PA, Sweeney, WE, Tonry, JL, Wainscoat, RJ & Waters, C 2011, 'Four new T dwarfs identified in Pan-STARRS1 commissioning data', The Astronomical Journal, vol. 142, no. 3, 77. https://doi.org/10.1088/0004-6256/142/3/77

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T1 - Four new T dwarfs identified in Pan-STARRS1 commissioning data

AU - Deacon, Niall R.

AU - Liu, Michael C.

AU - Magnier, Eugene A.

AU - Bowler, Brendan P.

AU - Goldman, Bertrand

AU - Redstone, Joshua A.

AU - Burgett, W. S.

AU - Chambers, K. C.

AU - Flewelling, H.

AU - Kaiser, N.

AU - Lupton, R. H.

AU - Morgan, J. S.

AU - Price, P. A.

AU - Sweeney, W. E.

AU - Tonry, J. L.

AU - Wainscoat, R. J.

AU - Waters, C.

PY - 2011/9

Y1 - 2011/9

N2 - A complete well-defined sample of ultracool dwarfs is one of the key science programs of the Pan-STARRS 1 optical survey telescope (PS1). Here we combine PS1 commissioning data with the Two Micron All Sky Survey (2MASS) to conduct a proper motion search (01-20yr-1) for nearby T dwarfs, using optical+near-IR colors to select objects for spectroscopic follow-up. The addition of sensitive far-red optical imaging from PS1 enables discovery of nearby ultracool dwarfs that cannot be identified from 2MASS data alone. We have searched 3700deg2 of PS1 y-band (0.95-1.03 μm) data to y 19.5mag (AB) and J 16.5mag (Vega) and discovered four previously unknown bright T dwarfs. Three of the objects (with spectral types T1.5, T2, and T3.5) have photometric distances within 25pc and were missed by previous 2MASS searches due to more restrictive color selection criteria. The fourth object (spectral type T4.5) is more distant than 25pc and is only a single-band detection in 2MASS. We also examine the potential for completing the census of nearby ultracool objects with the PS1 3π survey.

AB - A complete well-defined sample of ultracool dwarfs is one of the key science programs of the Pan-STARRS 1 optical survey telescope (PS1). Here we combine PS1 commissioning data with the Two Micron All Sky Survey (2MASS) to conduct a proper motion search (01-20yr-1) for nearby T dwarfs, using optical+near-IR colors to select objects for spectroscopic follow-up. The addition of sensitive far-red optical imaging from PS1 enables discovery of nearby ultracool dwarfs that cannot be identified from 2MASS data alone. We have searched 3700deg2 of PS1 y-band (0.95-1.03 μm) data to y 19.5mag (AB) and J 16.5mag (Vega) and discovered four previously unknown bright T dwarfs. Three of the objects (with spectral types T1.5, T2, and T3.5) have photometric distances within 25pc and were missed by previous 2MASS searches due to more restrictive color selection criteria. The fourth object (spectral type T4.5) is more distant than 25pc and is only a single-band detection in 2MASS. We also examine the potential for completing the census of nearby ultracool objects with the PS1 3π survey.

KW - brown dwarfs

KW - stars: low-mass

KW - surveys

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U2 - 10.1088/0004-6256/142/3/77

DO - 10.1088/0004-6256/142/3/77

M3 - Article

AN - SCOPUS:80052749546

SN - 0004-6256

VL - 142

JO - The Astronomical Journal

JF - The Astronomical Journal

IS - 3

M1 - 77

ER -

Four new T dwarfs identified in Pan-STARRS1 commissioning data

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Keywords

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