Using red clump stars to correct the Gaia DR1 parallaxes

Guy Davies; M.~N. Lund; A. Miglio; Y. Elsworth; J.~S. Kuszlewicz; T.~S.~H. North; B. Rendle; W.~J. Chaplin; T.~S. Rodrigues; T.~L. Campante; L. Girardi; S.~J. Hale; O. Hall; Caitlin Jones; S.~D. Kawaler; I. Roxburgh; M. Schofield

doi:10.1051/0004-6361/201630066

Using red clump stars to correct the Gaia DR1 parallaxes

Guy Davies, M.~N. Lund, A. Miglio, Y. Elsworth, J.~S. Kuszlewicz, T.~S.~H. North, B. Rendle, W.~J. Chaplin, T.~S. Rodrigues, T.~L. Campante, L. Girardi, S.~J. Hale, O. Hall, Caitlin Jones, S.~D. Kawaler, I. Roxburgh, M. Schofield

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Abstract

Recent results have suggested that there is tension between the Gaia DR1 TGAS distances and the distances obtained using luminosities determined by eclipsing binaries or asteroseismology on red giant stars. We use the Ks-band luminosities of red clump stars, identified and characterized by asteroseismology, to make independent distance estimates. Our results suggest that Gaia TGAS distances contain a systematic error that decreases with increasing distance. We propose a correction to mitigate this offset as a function of parallax that is valid for the Kepler field and values of parallax that are less than ∼1.6 mas. For parallaxes greater than this, we find agreement with previously published values. We note that the TGAS distances to the red clump stars of the open cluster M67 show a high level of disagreement that is difficult to correct for.

Original language	English
Journal	Astronomy and Astrophysics
DOIs	https://doi.org/10.1051/0004-6361/201630066
Publication status	Published - 10 Jan 2017

Keywords

Astrophysics - Solar and Stellar Astrophysics
Astrophysics - Astrophysics of Galaxies

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10.1051/0004-6361/201630066

Davies_et_al_Using_red_clump_stars_Astrophys_&_Astron
Article published as detailed above Checked 23/2/2017
Final published version, 2.95 MBLicence: None: All rights reserved

https://arxiv.org/pdf/1701.02506v1.pdf

Asteroseismology and Helioseismology at Birmingham and Queen Mary
Chaplin, B., Elsworth, Y. & Miglio, A.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/04/15 → 30/09/18
Project: Research Councils

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Davies, G., Lund, M. N., Miglio, A., Elsworth, Y., Kuszlewicz, J. S., North, T. S. H., Rendle, B., Chaplin, W. J., Rodrigues, T. S., Campante, T. L., Girardi, L., Hale, S. J., Hall, O., Jones, C., Kawaler, S. D., Roxburgh, I., & Schofield, M. (2017). Using red clump stars to correct the Gaia DR1 parallaxes. Astronomy and Astrophysics. https://doi.org/10.1051/0004-6361/201630066

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title = "Using red clump stars to correct the Gaia DR1 parallaxes",

abstract = "Recent results have suggested that there is tension between the Gaia DR1 TGAS distances and the distances obtained using luminosities determined by eclipsing binaries or asteroseismology on red giant stars. We use the Ks-band luminosities of red clump stars, identified and characterized by asteroseismology, to make independent distance estimates. Our results suggest that Gaia TGAS distances contain a systematic error that decreases with increasing distance. We propose a correction to mitigate this offset as a function of parallax that is valid for the Kepler field and values of parallax that are less than ∼1.6 mas. For parallaxes greater than this, we find agreement with previously published values. We note that the TGAS distances to the red clump stars of the open cluster M67 show a high level of disagreement that is difficult to correct for.",

keywords = "Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies",

author = "Guy Davies and M.~N. Lund and A. Miglio and Y. Elsworth and J.~S. Kuszlewicz and T.~S.~H. North and B. Rendle and W.~J. Chaplin and T.~S. Rodrigues and T.~L. Campante and L. Girardi and S.~J. Hale and O. Hall and Caitlin Jones and S.~D. Kawaler and I. Roxburgh and M. Schofield",

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TY - JOUR

T1 - Using red clump stars to correct the Gaia DR1 parallaxes

AU - Davies, Guy

AU - Lund, M.~N.

AU - Miglio, A.

AU - Elsworth, Y.

AU - Kuszlewicz, J.~S.

AU - North, T.~S.~H.

AU - Rendle, B.

AU - Chaplin, W.~J.

AU - Rodrigues, T.~S.

AU - Campante, T.~L.

AU - Girardi, L.

AU - Hale, S.~J.

AU - Hall, O.

AU - Jones, Caitlin

AU - Kawaler, S.~D.

AU - Roxburgh, I.

AU - Schofield, M.

PY - 2017/1/10

Y1 - 2017/1/10

N2 - Recent results have suggested that there is tension between the Gaia DR1 TGAS distances and the distances obtained using luminosities determined by eclipsing binaries or asteroseismology on red giant stars. We use the Ks-band luminosities of red clump stars, identified and characterized by asteroseismology, to make independent distance estimates. Our results suggest that Gaia TGAS distances contain a systematic error that decreases with increasing distance. We propose a correction to mitigate this offset as a function of parallax that is valid for the Kepler field and values of parallax that are less than ∼1.6 mas. For parallaxes greater than this, we find agreement with previously published values. We note that the TGAS distances to the red clump stars of the open cluster M67 show a high level of disagreement that is difficult to correct for.

AB - Recent results have suggested that there is tension between the Gaia DR1 TGAS distances and the distances obtained using luminosities determined by eclipsing binaries or asteroseismology on red giant stars. We use the Ks-band luminosities of red clump stars, identified and characterized by asteroseismology, to make independent distance estimates. Our results suggest that Gaia TGAS distances contain a systematic error that decreases with increasing distance. We propose a correction to mitigate this offset as a function of parallax that is valid for the Kepler field and values of parallax that are less than ∼1.6 mas. For parallaxes greater than this, we find agreement with previously published values. We note that the TGAS distances to the red clump stars of the open cluster M67 show a high level of disagreement that is difficult to correct for.

KW - Astrophysics - Solar and Stellar Astrophysics

KW - Astrophysics - Astrophysics of Galaxies

U2 - 10.1051/0004-6361/201630066

DO - 10.1051/0004-6361/201630066

M3 - Article

SN - 0004-6361

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

Using red clump stars to correct the Gaia DR1 parallaxes

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Keywords

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Asteroseismology and Helioseismology at Birmingham and Queen Mary

Cite this