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Absolute Calibration of Cepheid Period-Luminosity Relations in NGC 4258

Publication ,  Journal Article
Yuan, W; Macri, LM; Riess, AG; Brink, TG; Casertano, S; Filippenko, AV; Hoffmann, SL; Huang, CD; Scolnic, D
Published in: Astrophysical Journal
November 1, 2022

Owing to its accurate distance measured from water-maser motions, NGC 4258 is one of the most important anchors for calibrating the Cepheid period-luminosity relations (PLRs). We expand on previous efforts and carry out a new Cepheid search in this system using the Hubble Space Telescope. We discover and measure a sample of 669 Cepheids in four new and two archival NGC 4258 fields, doubling the number of known Cepheids in this galaxy and obtaining an absolute calibration of their optical PLRs. We determine a Wesenheit (W VI HST) PLR of − 2.574 ( ± 0.034 ) − 3.294 ( ± 0.042 ) log P , consistent with an independent Large Magellanic Cloud (LMC) calibration at the level of 0.032 ± 0.044 mag in its zero-point, after accounting for a metallicity dependence of −0.20 ± 0.05 mag dex−1. Our determination of the PLR slope also agrees with the LMC-based value within their uncertainties. We attempt to characterize the metallicity effect of Cepheid PLRs using only the NGC 4258 sample, but a relatively narrow span of abundances limits our sensitivity and yields a W VI HST zero-point dependence of −0.07 ± 0.21 mag dex−1. The Cepheid measurements presented in this study have been used as part of the data to derive the Hubble constant in a companion paper by the SH0ES team.

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Published In

Astrophysical Journal

DOI

EISSN

1538-4357

ISSN

0004-637X

Publication Date

November 1, 2022

Volume

940

Issue

1

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 0306 Physical Chemistry (incl. Structural)
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

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Yuan, W., Macri, L. M., Riess, A. G., Brink, T. G., Casertano, S., Filippenko, A. V., … Scolnic, D. (2022). Absolute Calibration of Cepheid Period-Luminosity Relations in NGC 4258. Astrophysical Journal, 940(1). https://doi.org/10.3847/1538-4357/ac51db
Yuan, W., L. M. Macri, A. G. Riess, T. G. Brink, S. Casertano, A. V. Filippenko, S. L. Hoffmann, C. D. Huang, and D. Scolnic. “Absolute Calibration of Cepheid Period-Luminosity Relations in NGC 4258.” Astrophysical Journal 940, no. 1 (November 1, 2022). https://doi.org/10.3847/1538-4357/ac51db.
Yuan W, Macri LM, Riess AG, Brink TG, Casertano S, Filippenko AV, et al. Absolute Calibration of Cepheid Period-Luminosity Relations in NGC 4258. Astrophysical Journal. 2022 Nov 1;940(1).
Yuan, W., et al. “Absolute Calibration of Cepheid Period-Luminosity Relations in NGC 4258.” Astrophysical Journal, vol. 940, no. 1, Nov. 2022. Scopus, doi:10.3847/1538-4357/ac51db.
Yuan W, Macri LM, Riess AG, Brink TG, Casertano S, Filippenko AV, Hoffmann SL, Huang CD, Scolnic D. Absolute Calibration of Cepheid Period-Luminosity Relations in NGC 4258. Astrophysical Journal. 2022 Nov 1;940(1).
Journal cover image

Published In

Astrophysical Journal

DOI

EISSN

1538-4357

ISSN

0004-637X

Publication Date

November 1, 2022

Volume

940

Issue

1

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 0306 Physical Chemistry (incl. Structural)
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences