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A First Look at Cepheids in a SN Ia Host with JWST
Wenlong Yuan, Adam G. Riess, Stefano Casertano +1
We report the first look at extragalactic Cepheid variables with the James Webb Space Telescope, obtained from a serendipitous (to this purpose) observation of NGC 1365, host of an…
Cluster Cepheids with High Precision Gaia Parallaxes, Low Zeropoint Uncertainties, and Hubble Space Telescope Photometry
Adam G. Riess, Louise Breuval, Wenlong Yuan +6
We present HST photometry of 17 Cepheids in open clusters and their mean parallaxes from Gaia EDR3. These parallaxes are more precise than those from individual Cepheids (G<8 mag)…
Measurements of the Hubble Constant with a Two Rung Distance Ladder: Two Out of Three Ain't Bad
W. D'Arcy Kenworthy, Adam G. Riess, Daniel Scolnic +7
The three rung distance ladder, which calibrates Type Ia supernovae through stellar distances linked to geometric measurements, provides the highest precision direct measurement of…
Absolute Calibration of Cepheid Period-Luminosity Relations in NGC 4258
Wenlong Yuan, Lucas M. Macri, Adam G. Riess +6
NGC 4258 is one of the most important anchors for calibrating the Cepheid period--luminosity relations (PLRs) owing to its accurate distance measured from water maser motions. We e…
Interacting and quark matter at finite densities and quark stars
Wen-Li Yuan, Ang Li, Zhiqiang Miao +2
The stability and equation of state of quark matter are studied within both two-flavor and (2+1)-flavor Nambu-Jona-Lasinio (NJL) models including the vector interactions. With a fr…