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Optical Identification of Cepheids in 19 Host Galaxies of Type Ia Supernovae and NGC 4258 with the Hubble Space Telescope

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arxiv 1607.08658 v2 pith:EWDLSBSD submitted 2016-07-28 astro-ph.SR astro-ph.COastro-ph.GA

Optical Identification of Cepheids in 19 Host Galaxies of Type Ia Supernovae and NGC 4258 with the Hubble Space Telescope

Samantha L. Hoffmann , Lucas M. Macri , Adam G. Riess , Wenlong Yuan , Stefano Casertano , Ryan J. Foley , Alexei V. Filippenko , Brad E. Tucker
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Ryan Chornock Jeffrey M. Silverman Douglas L. Welch Ariel Goobar Rahman Amanullah
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classification astro-ph.SR astro-ph.COastro-ph.GA
keywords hostssupernovaecepheiddeterminehubblelocalopticalspace
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present results of an optical search for Cepheid variable stars using the Hubble Space Telescope (HST) in 19 hosts of Type Ia supernovae (SNe Ia) and the maser-host galaxy NGC 4258, conducted as part of the SH0ES project (Supernovae and H0 for the Equation of State of dark energy). The targets include 9 newly imaged SN Ia hosts using a novel strategy based on a long-pass filter that minimizes the number of HST orbits required to detect and accurately determine Cepheid properties. We carried out a homogeneous reduction and analysis of all observations, including new universal variability searches in all SN Ia hosts, that yielded a total of 2200 variables with well-defined selection criteria -- the largest such sample identified outside the Local Group. These objects are used in a companion paper to determine the local value of H0 with a total uncertainty of 2.4%.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Selection effects in correlated observations with application to distance-ladder observations

    astro-ph.CO 2026-07 conditional novelty 5.0

    Residual correlated-selection effects are weakly detected (1.2–1.9σ) in Cepheid photometry and can shift the distance-ladder Hubble constant down by 0.7–1.1 km/s/Mpc.

  2. The potential broader complex linked to the key Cepheid SV Vul

    astro-ph.SR 2026-07 conditional novelty 5.0

    SV Vul and its host cluster Alicante 13 lie at 2.30 ± 0.13 kpc and may share a common origin with the nearby cluster Liu-Pang 1738.