Results 31 to 40 of about 5,541 (198)

CCD SDSS gr Photometry of Poorly Studied Star Clusters in the Large Magellanic Cloud

International Scholarly Research Notices, Volume 2014, Issue 1, 2014., 2014
We present for the first time CCD SDSS gr photometry, obtained at the Gemini South telescope with the GMOS attached, of stars in the field of the poorly studied star clusters NGC1768, HS 85, SL 676, NGC2107, NGC2190, and SL 866, which are distributed in the main body of the Large Magellanic Cloud.
Andrés E. Piatti, M. Marconi, L. Pulone
wiley   +1 more source

Period distributions of irregularly variable RR Lyrae stars [PDF]

Publications of the Astronomical Society of the Pacific, 1981
The occurrence of irregularly variable RR Lyrae stars in four globular clusters and the Draco dwarf spheroidal galaxy are examined in order to determine their period distributions. Two of the clusters are of Oosterhoff type I, M3 and M5, and two are of Oosterhoff type II, M15 and omega-Cen.
openaire   +1 more source

Three dimensional maps of the Magellanic Clouds using RR Lyrae Stars and Cepheids II. The Small Magellanic Cloud [PDF]

, 2012
We use data on variable stars from the Optical Gravitational Lensing Experiment (OGLE III) survey to determine the three-dimensional structure of the Small Magellanic Cloud (SMC).
Duffau, Sonia, Grebel, Eva K., Haschke, Raoul   +2 more
core   +1 more source

Implications and Applications of Kinematic Galaxy Scaling Relations

International Scholarly Research Notices, Volume 2012, Issue 1, 2012., 2012
Galaxy scaling relations, which describe a connection between ostensibly unrelated physical characteristics, testify to an underlying order in galaxy formation that requires understanding. I review the development of a scaling relation that (1) unites the well‐known fundamental plane (FP) relation of giant elliptical galaxies and Tully‐Fisher (TF ...
Dennis Zaritsky, J. A. L. Aguerri, P. Salucci   +2 more
wiley   +1 more source

The K2 RR Lyrae Survey

EPJ Web of Conferences, 2017
We have initiated a large survey with K2 to observe thousands of RR Lyrae stars along the Ecliptic. The high photometric precision and the 80-90-day continuous coverage will allow us to investigate the light variation of these galactic structure tracer ...
Szabó Róbert, Kolenberg Katrien, Molnár László, Plachy Emese, Klagyivik Péter, Hanyecz Ottó   +5 more
doaj   +1 more source

Three Years of Experience with the STELLA Robotic Observatory

Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010
Since May 2006, the two STELLA robotic telescopes at the Izaña observatory in Tenerife, Spain, delivered an almost uninterrupted stream of scientific data. To achieve such a high level of autonomous operation, the replacement of all troubleshooting skills of a regular observer in software was required. Care must be taken on error handling issues and on
Thomas Granzer, Michael Weber, Klaus G. Strassmeier, Joshua S. Bloom   +3 more
wiley   +1 more source

The Variable Stars of the Draco Dwarf Spheroidal Galaxy - Revisited [PDF]

, 2008
We present a CCD survey of variable stars in the Draco dwarf spheroidal galaxy. This survey, which has the largest areal coverage since the original variable star survey by Baade & Swope, includes photometry for 270 RR Lyrae stars, 9 anomalous Cepheids ...
A. P. LaCluyzé, Aparicio, Azzopardi, Bellazzini, Bonanos, C. L. Clark, Cacciari, Cacciari, Catelan, Catelan, Clement, Clement, Clement, Dall'Ora, Goranskij, H. C. Harris, Hilker, Horace A. Smith, Jurcsik, Jurcsik, K. Kinemuchi, Kinemuchi, L. A. Snyder, Margon, N. A. Silbermann, Nemec, Oosterhoff, Petersen, Pritzl, Pritzl, Pritzl, Reimann, Rood, Sandage, Schlegel, Schneider, Shetrone, Simon, Smith, Stothers   +39 more
core   +2 more sources

ASAS-SN Discovery of 4880 Bright RR Lyrae Variable Stars [PDF]

Research Notes of the AAS, 2018
We present a catalog of 4880 newly identified RR Lyrae variable stars (4433 RRab, 446 RRc and 1 RRd) found during the search for supernovae by the All-Sky Automated Survey for Supernovae (ASAS-SN). The light curves, classified using the "Upsilon" random forest classifier and visually verified, are available through the ASAS-SN variable star database ...
T. Jayasinghe, C. S. Kochanek, K. Z. Stanek, B. J. Shappee, T. W. -S. Holoien, T. A. Thompson, J. L. Prieto, Subo Dong, C. A. Britt, D. Will   +9 more
openaire   +2 more sources

The Changing Lightcurve of the Double-mode RR Lyrae Variable Star V338 Boo [PDF]

The Astrophysical Journal Letters, 2021
Abstract We present an analysis of the lightcurve extracted from Transiting Exoplanet Survey Satellite (TESS) Full Frame Images (FFIs) of the double-mode RR Lyrae V338 Boo. We find that the fundamental mode pulsation is changing in amplitude across the 54 days of observations. The first overtone mode pulsation also changes, but on a much
Kenneth Carrell, Ronald Wilhelm, Faith Olsen, Andrew Tom, Garath Vetters, Anna McElhannon   +5 more
openaire   +2 more sources

Variable Stars in the Unusual, Metal-Rich Globular Cluster NGC 6388 [PDF]

, 2001
We have undertaken a search for variable stars in the metal-rich globular cluster NGC 6388 using time-series BV photometry. Twenty-eight new variables were found in this survey, increasing the total number of variables found near NGC 6388 to ~57.
Alcaino G., Allen V. Sweigart, Barton J. Pritzl, Bingham E. A., Brocato E., Caloi V., Caputo F., Castellani V., Catelan M., Catelan M., Fusi Pecci F., Horace A. Smith, Jurcsik J., Jurcsik J., Jurcsik J., Kaluzny J., Kovacs G., Lloyd Evans T., Márcio Catelan, Petersen J. O., Reimers D.   +20 more
core   +3 more sources