Discovery of a new Y dwarf: WISE J030449.03-270508.3

D.J. Pinfield; M. Gromadzki; S.K. Leggett; J. Gomes; N. Lodieu; R. Kurtev; A. C. Day-Jones; M. T. Ruiz; N. J. Cook; C.V. Morley; M. S. Marley; F. Marocco; R.L. Smart; H.R.A. Jones; P.W. Lucas; Y. Beletsky; V. D. Ivanov; B. Burningham; J. S. Jenkins; C. Cardoso; J. Frith; J. R. A. Clarke; M. C. Gálvez-Ortiz; Z. Zhang

doi:10.1093/mnras/stu1540

Discovery of a new Y dwarf: WISE J030449.03-270508.3

D.J. Pinfield, M. Gromadzki, S.K. Leggett, J. Gomes, N. Lodieu, R. Kurtev, A. C. Day-Jones, M. T. Ruiz, N. J. Cook, C.V. Morley, M. S. Marley, F. Marocco, R.L. Smart, H.R.A. Jones, P.W. Lucas, Y. Beletsky, V. D. Ivanov, B. Burningham, J. S. Jenkins, C. CardosoJ. Frith, J. R. A. Clarke, M. C. Gálvez-Ortiz, Z. Zhang

Centre for Astrophysics Research (CAR)

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Abstract

We present a new Y dwarf, WISE J030449.03−270508.3, confirmed from a candidate sample designed to pick out low-temperature objects from the Wide-field Infrared Survey Explorer (WISE) data base. The new object is typed Y0pec following a visual comparison with spectral standards, and lies at a likely distance of 10–17 pc. Its tangential velocity suggests thin disc membership, but it shows some spectral characteristics that suggest that it may be metal poor and/or older than previously identified Y0 dwarfs. Based on trends seen for warmer late-type T dwarfs, the Y-band flux peak morphology is indicative of sub-solar metallicity, and the enhanced red wing of the J-band flux peak offers evidence for high gravity and/or low metallicity (with associated model trends suggesting an age closer to ∼10 Gyr and mass in the range 0.02–0.03 Mȯ). This object may thus be extending the population parameter space of the known Y0 dwarfs.

Original language	English
Article number	stu1540
Pages (from-to)	1931-1939
Number of pages	9
Journal	Monthly Notices of the Royal Astronomical Society
Volume	444
Issue number	2
Early online date	4 Sept 2014
DOIs	https://doi.org/10.1093/mnras/stu1540
Publication status	Published - 21 Oct 2014

Keywords

Brown dwarfs
Stars: Low-mass
Surveys

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907135Accepted author manuscript, 2.08 MB

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Pinfield, D. J., Gromadzki, M., Leggett, S. K., Gomes, J., Lodieu, N., Kurtev, R., Day-Jones, A. C., Ruiz, M. T., Cook, N. J., Morley, C. V., Marley, M. S., Marocco, F., Smart, R. L., Jones, H. R. A., Lucas, P. W., Beletsky, Y., Ivanov, V. D., Burningham, B., Jenkins, J. S., ... Zhang, Z. (2014). Discovery of a new Y dwarf: WISE J030449.03-270508.3. Monthly Notices of the Royal Astronomical Society, 444(2), 1931-1939. Article stu1540. https://doi.org/10.1093/mnras/stu1540

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title = "Discovery of a new Y dwarf: WISE J030449.03-270508.3",

abstract = "We present a new Y dwarf, WISE J030449.03−270508.3, confirmed from a candidate sample designed to pick out low-temperature objects from the Wide-field Infrared Survey Explorer (WISE) data base. The new object is typed Y0pec following a visual comparison with spectral standards, and lies at a likely distance of 10–17 pc. Its tangential velocity suggests thin disc membership, but it shows some spectral characteristics that suggest that it may be metal poor and/or older than previously identified Y0 dwarfs. Based on trends seen for warmer late-type T dwarfs, the Y-band flux peak morphology is indicative of sub-solar metallicity, and the enhanced red wing of the J-band flux peak offers evidence for high gravity and/or low metallicity (with associated model trends suggesting an age closer to ∼10 Gyr and mass in the range 0.02–0.03 Mȯ). This object may thus be extending the population parameter space of the known Y0 dwarfs.",

keywords = "Brown dwarfs, Stars: Low-mass, Surveys",

author = "D.J. Pinfield and M. Gromadzki and S.K. Leggett and J. Gomes and N. Lodieu and R. Kurtev and Day-Jones, {A. C.} and Ruiz, {M. T.} and Cook, {N. J.} and C.V. Morley and Marley, {M. S.} and F. Marocco and R.L. Smart and H.R.A. Jones and P.W. Lucas and Y. Beletsky and Ivanov, {V. D.} and B. Burningham and Jenkins, {J. S.} and C. Cardoso and J. Frith and Clarke, {J. R. A.} and G{\'a}lvez-Ortiz, {M. C.} and Z. Zhang",

note = "This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record [D. J. Pinfield, et al, Discovery of a new Y dwarf: WISE J030449.03−270508.3, MNRAS, Vol. 444 (2): 1931-1939, September 2014] is available online at: https://doi.org/10.1093/mnras/stu1540.",

year = "2014",

month = oct,

day = "21",

doi = "10.1093/mnras/stu1540",

language = "English",

volume = "444",

pages = "1931--1939",

journal = "Monthly Notices of the Royal Astronomical Society",

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publisher = "Oxford University Press (OUP)",

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Pinfield, DJ, Gromadzki, M, Leggett, SK, Gomes, J, Lodieu, N, Kurtev, R, Day-Jones, AC, Ruiz, MT, Cook, NJ, Morley, CV, Marley, MS, Marocco, F, Smart, RL, Jones, HRA , Lucas, PW, Beletsky, Y, Ivanov, VD, Burningham, B, Jenkins, JS, Cardoso, C, Frith, J, Clarke, JRA, Gálvez-Ortiz, MC & Zhang, Z 2014, 'Discovery of a new Y dwarf: WISE J030449.03-270508.3', Monthly Notices of the Royal Astronomical Society, vol. 444, no. 2, stu1540, pp. 1931-1939. https://doi.org/10.1093/mnras/stu1540

TY - JOUR

T1 - Discovery of a new Y dwarf: WISE J030449.03-270508.3

AU - Pinfield, D.J.

AU - Gromadzki, M.

AU - Leggett, S.K.

AU - Gomes, J.

AU - Lodieu, N.

AU - Kurtev, R.

AU - Day-Jones, A. C.

AU - Ruiz, M. T.

AU - Cook, N. J.

AU - Morley, C.V.

AU - Marley, M. S.

AU - Marocco, F.

AU - Smart, R.L.

AU - Jones, H.R.A.

AU - Lucas, P.W.

AU - Beletsky, Y.

AU - Ivanov, V. D.

AU - Burningham, B.

AU - Jenkins, J. S.

AU - Cardoso, C.

AU - Frith, J.

AU - Clarke, J. R. A.

AU - Gálvez-Ortiz, M. C.

AU - Zhang, Z.

N1 - This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record [D. J. Pinfield, et al, Discovery of a new Y dwarf: WISE J030449.03−270508.3, MNRAS, Vol. 444 (2): 1931-1939, September 2014] is available online at: https://doi.org/10.1093/mnras/stu1540.

PY - 2014/10/21

Y1 - 2014/10/21

N2 - We present a new Y dwarf, WISE J030449.03−270508.3, confirmed from a candidate sample designed to pick out low-temperature objects from the Wide-field Infrared Survey Explorer (WISE) data base. The new object is typed Y0pec following a visual comparison with spectral standards, and lies at a likely distance of 10–17 pc. Its tangential velocity suggests thin disc membership, but it shows some spectral characteristics that suggest that it may be metal poor and/or older than previously identified Y0 dwarfs. Based on trends seen for warmer late-type T dwarfs, the Y-band flux peak morphology is indicative of sub-solar metallicity, and the enhanced red wing of the J-band flux peak offers evidence for high gravity and/or low metallicity (with associated model trends suggesting an age closer to ∼10 Gyr and mass in the range 0.02–0.03 Mȯ). This object may thus be extending the population parameter space of the known Y0 dwarfs.

AB - We present a new Y dwarf, WISE J030449.03−270508.3, confirmed from a candidate sample designed to pick out low-temperature objects from the Wide-field Infrared Survey Explorer (WISE) data base. The new object is typed Y0pec following a visual comparison with spectral standards, and lies at a likely distance of 10–17 pc. Its tangential velocity suggests thin disc membership, but it shows some spectral characteristics that suggest that it may be metal poor and/or older than previously identified Y0 dwarfs. Based on trends seen for warmer late-type T dwarfs, the Y-band flux peak morphology is indicative of sub-solar metallicity, and the enhanced red wing of the J-band flux peak offers evidence for high gravity and/or low metallicity (with associated model trends suggesting an age closer to ∼10 Gyr and mass in the range 0.02–0.03 Mȯ). This object may thus be extending the population parameter space of the known Y0 dwarfs.

KW - Brown dwarfs

KW - Stars: Low-mass

KW - Surveys

U2 - 10.1093/mnras/stu1540

DO - 10.1093/mnras/stu1540

M3 - Article

AN - SCOPUS:84921491508

SN - 0035-8711

VL - 444

SP - 1931

EP - 1939

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

M1 - stu1540

ER -

Discovery of a new Y dwarf: WISE J030449.03-270508.3

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Keywords

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