Results 121 to 130 of about 2,384 (215)

A comprehensive study of Cepheid variables in the Andromeda galaxy

, 2007
Extragalactic Cepheids are the basic rungs of the cosmic distance scale. They are excellent standard candles, although their luminosities and corresponding distance estimates can be affected by the particular properties of the host galaxy. Therefore, the
C. Jordi, I. Ribas, F. Vilardell
core   +1 more source

The Araucaria Project. An improved distance to the Sculptor spiral galaxy NGC 300 from its Cepheid variables

, 2004
Latex, Astronomical Journal in pressIn a previous paper, we reported on the discovery of more than a hundred new Cepheid variables in the Sculptor Group spiral NGC 300 from wide-field images taken in the B and V photometric bands at ESO/La Silla. In this
Kudritzki, R. P., Bresolin, F., Fouque, P., Udalski, A., Soszynski, I., Walker, A., Storm, J., Gieren, W., Bono, Guillaume, Pietrzynski, G., Minniti, D.   +10 more
core  

Cepheid Variables in M33 and the Extragalactic Distance Scale [PDF]

, 2010
The DIRECT project aims to improve the extragalactic distance ladder by discovering Cepheids and eclipsing binaries in M31 and M33. We present the detection of Cepheids and other variables in M33 based on data obtained by the project over three observing
Bradshaw, Andrew K.
core  

Cepheid Period-Radius and Period-Luminosity Relations and the Distance to the LMC

, 1998
LaTeX, AASTeX style, 9 Figures, 10 Tables, The Astrophysical Journal in press (accepted Oct. 14, 1997). Fig. 3 replacedWe have used the infrared Barnes-Evans surface brightness technique to derive the radii and distances of 34 Galactic Cepheid variables.
Fouqué, Pascal, Gomez, Matias, Gieren, Wolfgang P.   +2 more
core  

The Mira Distance to M101 and a 4% Measurement of H 0

The Astrophysical Journal
The giant spiral galaxy M101 is host to the nearest recent Type Ia supernova (SN 2011fe) and thus has been extensively monitored in the near-infrared to study the late-time light curve of the SN.
Caroline D. Huang, Wenlong Yuan, Adam G. Riess, Warren Hack, Patricia A. Whitelock, Nadia L. Zakamska, Stefano Casertano, Lucas M. Macri, Massimo Marengo, John W. Menzies, Randall K. Smith   +10 more
doaj   +1 more source

Cepheid distance measurements of SNIa host galaxies

, 2019
International audienceOne of the most fundamental cosmological parameters is the current expansion rate of the Universe, i.e. the Hubble Constant (H_{0}).
Kervella, Pierre, Javanmardi, Behnam
core  

The Milky Way as Seen by Classical Cepheids. I. Distances Based on Mid-infrared Photometry

The Astrophysical Journal Supplement Series
Classical Cepheids are the archetype of the standard candle, thanks to the period–luminosity relation, which allows us to measure their intrinsic brightness.
Dorota M. Skowron, Ronald Drimmel, Shourya Khanna, Alessandro Spagna, Eloisa Poggio, Pau Ramos   +5 more
doaj   +1 more source

The Perfect Host: JWST Cepheid Observations in a Background-free Type Ia Supernova Host Confirm No Bias in Hubble-constant Measurements

The Astrophysical Journal Letters
Cycle 1 JWST observations of Cepheids in Type Ia supernova (SN Ia) hosts resolved their red-giant-dominated near-infrared backgrounds, sharply reducing crowding and showing that photometric bias in lower-resolution Hubble Space Telescope (HST) data does ...
Adam G. Riess, Siyang Li, Gagandeep S. Anand, Wenlong Yuan, Louise Breuval, Stefano Casertano, Lucas M. Macri, Dan Scolnic, Yukei S. Murakami, Alexei V. Filippenko, Thomas G. Brink   +10 more
doaj   +1 more source

The Orbit and Dynamical Mass of Polaris: Observations with the CHARA Array

The Astrophysical Journal
The 30 yr orbit of the Cepheid Polaris has been followed with observations by the Center for High Angular Resolution Astronomy (CHARA) Array from 2016 through 2021.
Nancy Remage Evans, Gail H. Schaefer, Alexandre Gallenne, Guillermo Torres, Elliott P. Horch, Richard I. Anderson, John D. Monnier, Rachael M. Roettenbacher, Fabien Baron, Narsireddy Anugu, James W. Davidson Jr., Pierre Kervella, Garance Bras, Charles Proffitt, Antoine Mérand, Margarita Karovska, Jeremy Jones, Cyprien Lanthermann, Stefan Kraus, Isabelle Codron, Howard E. Bond, Giordano Viviani   +21 more
doaj   +1 more source

APPLICATION OF CEPHEIDS TO DISTANCE SCALE: EXTENDING TO ULTRA-LONG PERIOD CEPHEIDS

Publications of The Korean Astronomical Society, 2015
Classical Cepheids (hereafter Cepheids) belong to a class of important variable stars that can be used to determine distances to nearby galaxies via the famous period-luminosity (PL) relations, i.e. the Leavitt Law. In turn, these distances can then be used to calibrate a host of secondary distance indicators located well within the Hubble ow, and ...
openaire   +2 more sources