Parallaxes and infrared photometry of three Y0 dwarfs

R. L. Smart; D'aniel Apai; J. Davy Kirkpatrick; S. K. Leggett; F. Marocco; Jane E. Morrison; H. R.A. Jones; D. Pinfield; P. Tremblin; D. S. Amundsen

doi:10.1093/mnras/stx723

Parallaxes and infrared photometry of three Y0 dwarfs

R. L. Smart, D'aniel Apai, J. Davy Kirkpatrick, S. K. Leggett, F. Marocco, Jane E. Morrison, H. R.A. Jones, D. Pinfield, P. Tremblin, D. S. Amundsen

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

7 Scopus citations

Abstract

We have followed up the three Y0 dwarfs WISEPA J041022.71+150248.5, WISEPA J173835.53+273258.9 and WISEPC J205628.90+145953.3 using the United Kingdom Infrared TelescopeWide Field Camera. We find parallaxes that are more consistent and accurate than previously published values. We estimate absolute magnitudes in photometric passbands from Y to W3 and find them to be consistent between the three Y0 dwarfs indicating that the inherent cosmic absolute magnitude spread of these objects is small. We examine the Mauna Kea Observatory system J magnitudes over the 4 yr time line and find small but significant monotonic variations. Finally, we estimate physical parameters from a comparison of spectra and parallax to equilibrium and non-equilibrium models finding values consistent with solar metallicity, an effective temperature of 450-475 K and log g of 4.0-4.5.

Original language	English (US)
Pages (from-to)	3764-3774
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	468
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stx723
State	Published - Jul 2017

Keywords

Astrometry
Brown dwarfs
Parallaxes
Techniques: spectroscopic

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stx723

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title = "Parallaxes and infrared photometry of three Y0 dwarfs",

abstract = "We have followed up the three Y0 dwarfs WISEPA J041022.71+150248.5, WISEPA J173835.53+273258.9 and WISEPC J205628.90+145953.3 using the United Kingdom Infrared TelescopeWide Field Camera. We find parallaxes that are more consistent and accurate than previously published values. We estimate absolute magnitudes in photometric passbands from Y to W3 and find them to be consistent between the three Y0 dwarfs indicating that the inherent cosmic absolute magnitude spread of these objects is small. We examine the Mauna Kea Observatory system J magnitudes over the 4 yr time line and find small but significant monotonic variations. Finally, we estimate physical parameters from a comparison of spectra and parallax to equilibrium and non-equilibrium models finding values consistent with solar metallicity, an effective temperature of 450-475 K and log g of 4.0-4.5.",

keywords = "Astrometry, Brown dwarfs, Parallaxes, Techniques: spectroscopic",

author = "Smart, {R. L.} and D'aniel Apai and Kirkpatrick, {J. Davy} and Leggett, {S. K.} and F. Marocco and Morrison, {Jane E.} and Jones, {H. R.A.} and D. Pinfield and P. Tremblin and Amundsen, {D. S.}",

note = "Publisher Copyright: {\textcopyright} 2017 The Authors.",

year = "2017",

month = jul,

doi = "10.1093/mnras/stx723",

language = "English (US)",

volume = "468",

pages = "3764--3774",

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

issn = "0035-8711",

publisher = "Oxford University Press",

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TY - JOUR

T1 - Parallaxes and infrared photometry of three Y0 dwarfs

AU - Smart, R. L.

AU - Apai, D'aniel

AU - Kirkpatrick, J. Davy

AU - Leggett, S. K.

AU - Marocco, F.

AU - Morrison, Jane E.

AU - Jones, H. R.A.

AU - Pinfield, D.

AU - Tremblin, P.

AU - Amundsen, D. S.

PY - 2017/7

Y1 - 2017/7

N2 - We have followed up the three Y0 dwarfs WISEPA J041022.71+150248.5, WISEPA J173835.53+273258.9 and WISEPC J205628.90+145953.3 using the United Kingdom Infrared TelescopeWide Field Camera. We find parallaxes that are more consistent and accurate than previously published values. We estimate absolute magnitudes in photometric passbands from Y to W3 and find them to be consistent between the three Y0 dwarfs indicating that the inherent cosmic absolute magnitude spread of these objects is small. We examine the Mauna Kea Observatory system J magnitudes over the 4 yr time line and find small but significant monotonic variations. Finally, we estimate physical parameters from a comparison of spectra and parallax to equilibrium and non-equilibrium models finding values consistent with solar metallicity, an effective temperature of 450-475 K and log g of 4.0-4.5.

AB - We have followed up the three Y0 dwarfs WISEPA J041022.71+150248.5, WISEPA J173835.53+273258.9 and WISEPC J205628.90+145953.3 using the United Kingdom Infrared TelescopeWide Field Camera. We find parallaxes that are more consistent and accurate than previously published values. We estimate absolute magnitudes in photometric passbands from Y to W3 and find them to be consistent between the three Y0 dwarfs indicating that the inherent cosmic absolute magnitude spread of these objects is small. We examine the Mauna Kea Observatory system J magnitudes over the 4 yr time line and find small but significant monotonic variations. Finally, we estimate physical parameters from a comparison of spectra and parallax to equilibrium and non-equilibrium models finding values consistent with solar metallicity, an effective temperature of 450-475 K and log g of 4.0-4.5.

KW - Astrometry

KW - Brown dwarfs

KW - Parallaxes

KW - Techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=85051472878&partnerID=8YFLogxK

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U2 - 10.1093/mnras/stx723

DO - 10.1093/mnras/stx723

M3 - Article

AN - SCOPUS:85051472878

SN - 0035-8711

VL - 468

SP - 3764

EP - 3774

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Parallaxes and infrared photometry of three Y0 dwarfs

Abstract

Keywords

ASJC Scopus subject areas

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