Results 21 to 30 of about 11,049 (214)

Cepheid distances from the Baade–Wesselink method [PDF]

Proceedings of the International Astronomical Union, 2012
AbstractRecent progress on Baade–Wesselink (BW)-type techniques to determine the distances to classical Cepheids is reviewed. Particular emphasis is placed on the near-infrared surface-brightness (IRSB) version of the BW method. Its most recent calibration is described and shown to be capable of yielding individual Cepheid distances accurate to 6 ...
Gieren, Wolfgang, Storm, Jesper, Nardetto, Nicolas, Gallenne, Alexandre, Pietrzyński, Grzegorz, Fouqué, Pascal, Barnes, Thomas G., Majaess, Daniel   +7 more
openaire   +2 more sources

THE EXTRAGALACTIC DISTANCE SCALE WITHOUT CEPHEIDS. IV. [PDF]

The Astrophysical Journal, 2011
ApJ in press ...
Hislop, Lachlan, Mould, Jeremy, Schmidt, Brian, Bessell, Michael, Da Costa, Gary, Francis, Paul, Keller, Stefan, Tisserand, Patrick, Rapoport, Sharon, Casey, Andrew   +9 more
openaire   +3 more sources

CEPHEIDS AS DISTANCE INDICATORS: SOME CURRENT PROBLEMS

Odessa Astronomical Publications, 2017
A general review is given of the calibration of the Cepheid distance scale, with particular reference to its use in the determination of H0. Emphasis is placed on the advantage of using a galactic calibration of the Cepheid scale, rather than relying on ...
M. Feast
doaj   +1 more source

Cepheid Variables in the Maser-Host Galaxy NGC 4258 [PDF]

, 2015
We present results of a ground-based survey for Cepheid variables in NGC 4258. This galaxy plays a key role in the Extragalactic Distance Scale due to its very precise and accurate distance determination via VLBI observations of water masers.
Hoffmann, Samantha L., Macri, Lucas M.
core   +3 more sources

Crowded No More: The Accuracy of the Hubble Constant Tested with High-resolution Observations of Cepheids by JWST

The Astrophysical Journal Letters, 2023
High-resolution James Webb Space Telescope (JWST) observations can test confusion-limited Hubble Space Telescope (HST) observations for a photometric bias that could affect extragalactic Cepheids and the determination of the Hubble constant.
Adam G. Riess, Gagandeep S. Anand, Wenlong Yuan, Stefano Casertano, Andrew Dolphin, Lucas M. Macri, Louise Breuval, Dan Scolnic, Marshall Perrin, Richard I. Anderson   +9 more
doaj   +1 more source

Distances and Radii of Classical Cepheids [PDF]

International Astronomical Union Colloquium, 1985
We have used new BVRI photometry and radial velocities of a selection of bright classical Cepheids to determine their distances and radii through the surface brightness method. The improved photometry permitted, through the visual surface brightness relation, high-quality angular-diameter values for each Cepheid throughout its pulsation.
T. G. Barnes, T. J. Moffett
openaire   +1 more source

The extra-galactic Cepheid distance scale from LMC and Galactic period-luminosity relations [PDF]

, 2003
In this paper, we recalibrate the Cepheid distance to some nearby galaxies observed by the HST Key Project and the Sandage-Tammann-Saha group. We use much of the Key Project methodology in our analysis but apply new techniques, based on Fourier methods ...
Beaulieu, Beaulieu, Buchler, C. Ngeow, Caputo, Cardelli, Feast, Feast, Feast, Feast, Ferrarese, Freedman, Freedman, Freedman, Freedman, Gibson, Gibson, Gieren, Gould, Groenewegen, Groenewegen, Herrnstein, Hill, Holtzman, Kanbur, Kelson, Kennicutt, Kennicutt, Kochanek, Labhardt, Lanoix, Lanoix, Leonard, M. A. Hendry, Macri, Madore, Madore, Moffett, Moffett, Mould, N. R. Tanvir, Newman, Ngeow, Paturel, Paturel, Paturel, S. M. Kanbur, S. Nikolaev, Saha, Saha, Saha, Saha, Saha, Sandage, Sandage, Sasselov, Schechter, Sebo, Silbermann, Simon, Spergel, Stetson, Stetson, Stetson, Stetson, Stetson, Tammann, Tammann, Tanvir, Thim, Udalski, Udalski, Willick   +72 more
core   +2 more sources

A Determination of the Hubble Constant from Cepheid Distances and a Model of the Local Peculiar Velocity Field [PDF]

, 2001
We present a measurement of the Hubble Constant based on Cepheid distances to 27 galaxies within 20 Mpc. We take the Cepheid data from published measurements by the Hubble Telescope Key Project on the Distance Scale (H0KP).
Caretta E., Cioni M.-R. L., Jeffrey A. Willick, Puneet Batra, Udalski A., Udalski A.   +5 more
core   +3 more sources

Relative Intrinsic Scatter in Hierarchical Type Ia Supernova Sibling Analyses: Application to SNe 2021hpr, 1997bq, and 2008fv in NGC 3147

The Astrophysical Journal, 2023
We present Young Supernova Experiment grizy photometry of SN 2021hpr, the third Type Ia supernova sibling to explode in the Cepheid calibrator galaxy, NGC 3147.
Sam M. Ward, Stephen Thorp, Kaisey S. Mandel, Suhail Dhawan, David O. Jones, Kirsty Taggart, Ryan J. Foley, Gautham Narayan, Kenneth C. Chambers, David A. Coulter, Kyle W. Davis, Thomas de Boer, Kaylee de Soto, Nicholas Earl, Alex Gagliano, Hua Gao, Jens Hjorth, Mark E. Huber, Luca Izzo, Danial Langeroodi, Eugene A. Magnier, Peter McGill, Armin Rest, César Rojas-Bravo, Radosław Wojtak, Young Supernova Experiment   +25 more
doaj   +1 more source

Optical Light Curve of the Type Ia Supernova 1998bu in M96 and the Supernova Calibration of the Hubble Constant [PDF]

, 1998
We present the UBVRI light curves of the Type Ia supernova SN 1998bu which appeared in the nearby galaxy M96 (NGC 3368). M96 is a spiral galaxy in the Leo I group which has a Cepheid-based distance.
Acevedo, M. T., Ahumada, Andrea V., Claria, Juan J., Covarrubias, R., Doyle, Laurance R., Guerra, A., Harrison, Thomas, Kane, Stephen, Long, Knox S., Maza, Jose, Miller, Scott, Navarrete, M., Perez, J. J., Phillips, M. M., Piatti, Andres E., Pritzl, Barton, Suntzeff, Nicholas B., Winkler, P. Frank   +17 more
core   +3 more sources