The discovery of cepheids and a new distance to NGC 2841 using the Hubble space telescope

L. M. Macri; P. B. Stetson; G. D. Bothun; W. L. Freedman; P. M. Garnavich; S. Jha; B. F. Madore; M. W. Richmond

doi:10.1086/322395

The discovery of cepheids and a new distance to NGC 2841 using the Hubble space telescope

L. M. Macri, P. B. Stetson, G. D. Bothun, W. L. Freedman, P. M. Garnavich, S. Jha, B. F. Madore, M. W. Richmond

School of Arts and Sciences, New High Energy Theory Center

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

49 Scopus citations

Abstract

We report on the discovery of Cepheids in the spiral galaxy NGC 2841, based on observations made with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. NGC 2841 was observed over 12 epochs using the F555W filter and over five epochs using the F814W filter. Photometry was performed using the DAOPHOT/ALLFRAME package. We discovered a total of 29 variables, including 18 high-quality Cepheids with periods ranging from 15 to 40 days. Period-luminosity relations in the V and I bands, based on the high-quality Cepheids, yield a reddening-corrected distance modulus of 30.74 ± 0.23 mag, which corresponds to a distance of 14.1 ± 1.5 Mpc. Our distance is based on an assumed LMC distance modulus of μ₀ = 18.50 ± 0.10 mag (D = 50 ± 2.5 kpc) and a metallicity dependence of the Cepheid P-L relation of γ_VI = -0.2 ± 0.2 mag dex^-1.

Original language	English (US)
Pages (from-to)	243-259
Number of pages	17
Journal	Astrophysical Journal
Volume	559
Issue number	1 PART 1
DOIs	https://doi.org/10.1086/322395
State	Published - Sep 20 2001

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cepheids
Distance scale
Galaxies: individual (NGC 2841)

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10.1086/322395

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title = "The discovery of cepheids and a new distance to NGC 2841 using the Hubble space telescope",

abstract = "We report on the discovery of Cepheids in the spiral galaxy NGC 2841, based on observations made with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. NGC 2841 was observed over 12 epochs using the F555W filter and over five epochs using the F814W filter. Photometry was performed using the DAOPHOT/ALLFRAME package. We discovered a total of 29 variables, including 18 high-quality Cepheids with periods ranging from 15 to 40 days. Period-luminosity relations in the V and I bands, based on the high-quality Cepheids, yield a reddening-corrected distance modulus of 30.74 ± 0.23 mag, which corresponds to a distance of 14.1 ± 1.5 Mpc. Our distance is based on an assumed LMC distance modulus of μ0 = 18.50 ± 0.10 mag (D = 50 ± 2.5 kpc) and a metallicity dependence of the Cepheid P-L relation of γVI = -0.2 ± 0.2 mag dex-1.",

keywords = "Cepheids, Distance scale, Galaxies: individual (NGC 2841)",

author = "Macri, {L. M.} and Stetson, {P. B.} and Bothun, {G. D.} and Freedman, {W. L.} and Garnavich, {P. M.} and S. Jha and Madore, {B. F.} and Richmond, {M. W.}",

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doi = "10.1086/322395",

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T1 - The discovery of cepheids and a new distance to NGC 2841 using the Hubble space telescope

AU - Macri, L. M.

AU - Stetson, P. B.

AU - Bothun, G. D.

AU - Freedman, W. L.

AU - Garnavich, P. M.

AU - Jha, S.

AU - Madore, B. F.

AU - Richmond, M. W.

PY - 2001/9/20

Y1 - 2001/9/20

N2 - We report on the discovery of Cepheids in the spiral galaxy NGC 2841, based on observations made with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. NGC 2841 was observed over 12 epochs using the F555W filter and over five epochs using the F814W filter. Photometry was performed using the DAOPHOT/ALLFRAME package. We discovered a total of 29 variables, including 18 high-quality Cepheids with periods ranging from 15 to 40 days. Period-luminosity relations in the V and I bands, based on the high-quality Cepheids, yield a reddening-corrected distance modulus of 30.74 ± 0.23 mag, which corresponds to a distance of 14.1 ± 1.5 Mpc. Our distance is based on an assumed LMC distance modulus of μ0 = 18.50 ± 0.10 mag (D = 50 ± 2.5 kpc) and a metallicity dependence of the Cepheid P-L relation of γVI = -0.2 ± 0.2 mag dex-1.

AB - We report on the discovery of Cepheids in the spiral galaxy NGC 2841, based on observations made with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. NGC 2841 was observed over 12 epochs using the F555W filter and over five epochs using the F814W filter. Photometry was performed using the DAOPHOT/ALLFRAME package. We discovered a total of 29 variables, including 18 high-quality Cepheids with periods ranging from 15 to 40 days. Period-luminosity relations in the V and I bands, based on the high-quality Cepheids, yield a reddening-corrected distance modulus of 30.74 ± 0.23 mag, which corresponds to a distance of 14.1 ± 1.5 Mpc. Our distance is based on an assumed LMC distance modulus of μ0 = 18.50 ± 0.10 mag (D = 50 ± 2.5 kpc) and a metallicity dependence of the Cepheid P-L relation of γVI = -0.2 ± 0.2 mag dex-1.

KW - Cepheids

KW - Distance scale

KW - Galaxies: individual (NGC 2841)

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ER -

The discovery of cepheids and a new distance to NGC 2841 using the Hubble space telescope

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