Results 21 to 30 of about 177,797 (288)

New infrared star clusters in the Northern and Equatorial Milky Way with 2MASS [PDF]

, 2003
We carried out a survey of infrared star clusters and stellar groups on the 2MASS J, H and K_s all-sky release Atlas in the Northern and Equatorial Milky Way (350 < l < 360, 0 < l < 230). The search in this zone complements that in the Southern Milky Way
B. Barbuy, Bernes, Bica, Blitz, C. M. Dutra, Carpenter, Cederblad, Cohen, Deharveng, Deharveng, Dias, Downes, Dutra, Dutra, Dutra, Dutra, Dutra, E. Bica, Georgelin, Goldader, Gum, Gyulbudaghian, Gyulbudaghian, Gyulbudaghian, Gyulbudaghian, Gyulbudaghian, Gyulbudaghian, Gyulbudaghian, Gyulbudaghian, Hodapp, Ivanov, J. Soares, Kuchar, Le Duigou, Lockman, Marengo, Neckel, Parsamian, Parsamian, Reifenstein III, Reylé, Rodgers, Sharpless, Sharpless, Skrutskie, Soares, Sugitani, Tapia, van den Bergh, van den Bergh, van den Bergh, von Dorschner, Westerhout, Wilson, Wilson, Woodward   +55 more
core   +3 more sources

Symmetries in Stellar, Galactic, and Extragalactic Astronomy [PDF]

, 2021
Examples are presented for appearance of geometric symmetry in the shape of various astronomical objects and phenomena. Usage of these symmetries in astrophysical and extragalactic research is also discussed.
openaire   +2 more sources

Coronal activity with XMM-Newton and Chandra

, 2008
XMM-Newton and Chandra have greatly deepened our knowledge of stellar coronae giving access to a variety of new diagnostics such that nowadays a review of stellar X-ray astronomy necessarily must focus on a few selected topics.
B. Stelzer, Eric Stempels
core   +1 more source

Continuous stellar mass-loss in N-body models of galaxies [PDF]

, 2001
We present an N-body computer code - aimed at studies of galactic dynamics - with a CPU-efficient algorithm for a continuous (i.e. time-dependent) stellar mass-loss. First, we summarize available data on stellar mass-loss and derive the long-term (20 Gyr)
B. Jungwiert, Bressan, Buta, Combes, De Jager, F. Combes, Friedli, Hasan, Heller, Hockney, Hohl, J. Palouš, Jog, Jog, Jungwiert, Junqueira, Kennicutt, Marigo, Martinet, Miller, Moore, Pfenniger, Pfenniger, Portinari, Romeo, Romeo, Salpeter, Schmidt, Schwarz, Selwood, Tinsley, Toomre   +31 more
core   +2 more sources

Granulation signatures as seen by Kepler short-cadence data

Astronomy & Astrophysics
Context. Granulation is the observable surface signature of convection in the envelopes of low-mass stars, forming the background in stellar power spectra. While well-studied in evolved giants, granulation on the main sequence has received less attention.
Larsen J. R., Lundkvist M. S., Nielsen M. B., Davies G. R., Zhou Y., Lund M. N.   +5 more
doaj   +1 more source

Finding non-eclipsing binaries through pulsational phase modulation

EPJ Web of Conferences, 2015
We present a method for finding binaries among pulsating stars that were observed by the Kepler Mission. We use entire four-year light curves to accurately measure the frequencies of the strongest pulsation modes, then track the pulsation phases at those
Murphy Simon J., Bedding Timothy R., Shibahashi Hiromoto, Kurtz Donald W., Kjeldsen Hans   +4 more
doaj   +1 more source

Unveiling the Structure and Dynamics of Red Giants With Asteroseismology

Frontiers in Astronomy and Space Sciences, 2020
The Kepler mission observed many thousands of red giants. The long time series, some as long as the mission itself, have allowed us to study red giants with unprecedented detail. Given that red giants are intrinsically luminous, and hence can be observed
Sarbani Basu, Saskia Hekker, Saskia Hekker   +2 more
doaj   +1 more source

The Orion constellation as an installation - An innovative three dimensional teaching and learning environment

, 2012
Visualising the three dimensional distribution of stars within a constellation is highly challenging for both students and educators, but when carried out in an interactive collaborative way it can create an ideal environment to explore common ...
Brako E., Brown D., Daniel Brown, Hernandez U. O.   +3 more
core   +1 more source

KOI-3158: The oldest known system of terrestrial-size planets

EPJ Web of Conferences, 2015
The first discoveries of exoplanets around Sun-like stars have fueled efforts to find ever smaller worlds evocative of Earth and other terrestrial planets in the Solar System. While gas-giant planets appear to form preferentially around metal-rich stars,
Campante T. L., Barclay T., Swift J. J., Huber D., Adibekyan V. Zh., Cochran W., Burke C. J., Isaacson H., Quintana E. V., Davies G. R., Silva Aguirre V., Ragozzine D., Riddle R., Baranec C., Basu S., Chaplin W. J., Christensen-Dalsgaard J., Metcalfe T. S., Bedding T. R., Handberg R., Stello D., Brewer J. M., Hekker S., Karoff C., Kolbl R., Law N. M., Lundkvist M., Miglio A., Rowe J. F., Santos N. C., Van Laerhoven C., Arentoft T., Elsworth Y. P., Fischer D. A., Kawaler S. D., Kjeldsen H., Lund M. N., Marcy G. W., Sousa S. G., Sozzetti A., White T. R.   +40 more
doaj   +1 more source

Optical Polarimetry in Undergraduate Education [PDF]

EPJ Web of Conferences, 2019
Polarimetry plays an important part in observational astronomy, but it is all too often given limited attention in astronomy textbooks. Coupled with a sometimes confusing mathematical introduction, students may feel that polarization is a difficult ...
Topasna Gregory
doaj   +1 more source