Results 31 to 40 of about 5,915 (202)

Gaia Data Release 2: Validation of the classification of RR Lyrae and Cepheid variables with the Kepler and K2 missions [PDF]

, 1912
The second data release of the Gaia mission includes an advance catalog of variable stars. The classification of these stars are based on sparse photometry from the first 22 months of the mission.
Molnár, László, Plachy, Emese, Juhász, Áron L., Rimoldini, Lorenzo   +3 more
core   +2 more sources

Nonthermal X-Rays from Pulsation-driven Shocks in Cepheids

The Astrophysical Journal, 2023
Rapid X-ray phase-dependent flux enhancement in the archetype classical Cepheid star δ Cep was observed by XMM-Newton and Chandra. We jointly analyze thermal and nonthermal components of the time-resolved X-ray spectra prior to, during, and after the ...
Federico Fraschetti, Konstantina Anastasopoulou, Jeremy J. Drake, Nancy Remage Evans   +3 more
doaj   +1 more source

Synthetic Population of Binary Cepheids. II. The Effect of Companion Light on the Extragalactic Distance Scale

The Astrophysical Journal, 2023
Because of their period–luminosity relation (PLR), classical Cepheids play a key role in the calibration of the extragalactic distance scale and the determination of the Hubble–Lemaître constant H _0 .
Paulina Karczmarek, Gergely Hajdu, Grzegorz Pietrzyński, Wolfgang Gieren, Weronika Narloch, Radosław Smolec, Grzegorz Wiktorowicz, Krzysztof Belczynski   +7 more
doaj   +1 more source

Faint (and bright) variable stars in the satellites of the Milky Way

EPJ Web of Conferences, 2017
I describe two ongoing projects related with variable stars in the satellites of the MilkyWay. In the first project, we are searching for dwarf Cepheid stars (a.k.a δ Scuti and/or SX Phe) in some of the classical dwarf spheroidal galaxies. Our goal is to
Vivas A. Katherina
doaj   +1 more source

High-resolution Spectroscopic Metallicities of Milky Way Cepheid Standards and Their Impact on the Leavitt Law and the Hubble Constant

The Astrophysical Journal Letters, 2023
Milky Way Cepheid variables with accurate Hubble Space Telescope photometry have been established as standards for primary calibration of the cosmic distance ladder to achieve a percent-level determination of the Hubble constant ( H _0 ).
Anupam Bhardwaj, Adam G. Riess, Giovanni Catanzaro, Erasmo Trentin, Vincenzo Ripepi, Marina Rejkuba, Marcella Marconi, Chow-Choong Ngeow, Lucas M. Macri, Martino Romaniello, Roberto Molinaro, Harinder P. Singh, Shashi M. Kanbur   +12 more
doaj   +1 more source

Galactic Cepheids with Spitzer: II. Search for Extended Infrared Emission

, 2010
A deep and detailed examination of 29 classical Cepheids with the Spitzer Space Telescope has revealed three stars with strong nearby extended emission detected in multiple bands which appears to be physically associated with the stars.
Barmby, P., Bono, G., Evans, N. R., Fazio, G. G., Huelsman, D., Marengo, M., Su, K. Y. L., Welch, D. L.   +7 more
core   +1 more source

Properties of M31. II: A Cepheid disk sample derived from the first year of PS1 PAndromeda data

, 2013
We present a sample of Cepheid variable stars towards M31 based on the first year of regular M31 observations of the PS1 survey in the r_P1 and i_P1 filters.
Bender, Ralf, Burgett, W. S., Chambers, K. C., Goessl, Claus, Hodapp, K. W., Hopp, Ulrich, Kaiser, N., Kodric, Mihael, Koppenhoefer, Johannes, Kudritzki, R. -P., Lee, Chien-Hsiu, Magnier, E. A., Ngeow, Chow-Choong, Price, P. A., Riffeser, Arno, Seitz, Stella, Snigula, Jan   +16 more
core   +1 more source

Discovery of the Longest-period Classical Cepheid in the Milky Way

The Astrophysical Journal Letters
We report the discovery of the classical Cepheid OGLE-GD-CEP-1884 (= GDS_J1535467-555656) with the longest pulsation period known in our Galaxy. The period of 78.14 days is nearly 10 days longer than that of the previous record-holding Cepheid, S ...
I. Soszyński, D. M. Skowron, A. Udalski, P. Pietrukowicz, M. Gromadzki, M. K. Szymański, J. Skowron, P. Mróz, R. Poleski, S. Kozłowski, P. Iwanek, M. Wrona, K. Ulaczyk, K. Rybicki, M. Mróz   +14 more
doaj   +1 more source

Chemotherapy‐Induced Nausea and Vomiting in Early Breast Cancer Patients Receiving Adjuvant Chemotherapy With Fluorouracil, Epirubicin, Cyclophosphamide Followed by Docetaxel Versus an Anthracycline‐Free Regimen With Docetaxel, Cyclophosphamide—Results From a Randomized Clinical Trial

International Journal of Cancer, EarlyView.
Chemotherapy‐induced nausea and vomiting (CINV) remains a significant clinical problem despite modern antiemetics. In particular, antiemetic strategies for emerging cancer therapies lack detailed evaluation. This randomized trial analyzed hourly CINV data for patients with early breast cancer who received either docetaxel plus cyclophosphamide (TC) or ...
Manuel Hörner, Henning Schäffler, Lothar Häberle, Chloë Goossens, Kerstin Pfister, Elena Leinert, Kristina Veselinovic, Sara Y. Brucker, Uwe Köhler, Georg Heinrich, Andreas Schneeweiss, Matthias W. Beckmann, Peter A. Fasching, Wolfgang Janni, Brigitte Rack, Sabine Heublein, Philipp Ziegler   +16 more
wiley   +1 more source

On the Differential Galactic Rotation of the System of Cepheid Variable Stars [PDF]

Monthly Notices of the Royal Astronomical Society, 1956
openaire   +3 more sources