Metallicity-corrected tip of the red giant branch distance to NGC 4258

Violet A. Mager; Barry F. Madore; Wendy L. Freedman

doi:10.1086/592563

Metallicity-corrected tip of the red giant branch distance to NGC 4258

Violet A. Mager, Barry F. Madore, Wendy L. Freedman

Penn State Wilkes-Barre

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45 Scopus citations

Abstract

We have determined the distance to NGC 4258 using observations made with the Hubble Space Telescope (HST) and the Wide Field, Advanced Camera for Surveys (ACS WFC). We apply a modified technique that fully accounts for metallicity effects on the use of the luminosity of the tip of the red giant branch (TRGB) to determine one of the most precise TRGB distance moduli to date, μ(TRGB) = 29.28 ± 0.04 (random) ± 0.12 (systematic) mag (7.18 ± 0.13 ± 0.40 Mpc). We discuss this distance modulus with respect to other recent applications of the TRGB method to NGC 4258 and with several other techniques (Cepheids and masers) that are equally competitive in their precision, but different in their systematics.

Original language	English (US)
Pages (from-to)	721-731
Number of pages	11
Journal	Astrophysical Journal
Volume	689
Issue number	2
DOIs	https://doi.org/10.1086/592563
State	Published - Dec 20 2008

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/592563

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title = "Metallicity-corrected tip of the red giant branch distance to NGC 4258",

abstract = "We have determined the distance to NGC 4258 using observations made with the Hubble Space Telescope (HST) and the Wide Field, Advanced Camera for Surveys (ACS WFC). We apply a modified technique that fully accounts for metallicity effects on the use of the luminosity of the tip of the red giant branch (TRGB) to determine one of the most precise TRGB distance moduli to date, μ(TRGB) = 29.28 ± 0.04 (random) ± 0.12 (systematic) mag (7.18 ± 0.13 ± 0.40 Mpc). We discuss this distance modulus with respect to other recent applications of the TRGB method to NGC 4258 and with several other techniques (Cepheids and masers) that are equally competitive in their precision, but different in their systematics.",

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T1 - Metallicity-corrected tip of the red giant branch distance to NGC 4258

AU - Mager, Violet A.

AU - Madore, Barry F.

AU - Freedman, Wendy L.

PY - 2008/12/20

Y1 - 2008/12/20

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AB - We have determined the distance to NGC 4258 using observations made with the Hubble Space Telescope (HST) and the Wide Field, Advanced Camera for Surveys (ACS WFC). We apply a modified technique that fully accounts for metallicity effects on the use of the luminosity of the tip of the red giant branch (TRGB) to determine one of the most precise TRGB distance moduli to date, μ(TRGB) = 29.28 ± 0.04 (random) ± 0.12 (systematic) mag (7.18 ± 0.13 ± 0.40 Mpc). We discuss this distance modulus with respect to other recent applications of the TRGB method to NGC 4258 and with several other techniques (Cepheids and masers) that are equally competitive in their precision, but different in their systematics.

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Metallicity-corrected tip of the red giant branch distance to NGC 4258

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