Results 21 to 30 of about 178,075 (291)

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

Light Curve Analyses of the Eclipsing Binaries in the Small Magellan Cloud [PDF]

Journal of Astronomy and Space Sciences, 2008
Large survey observations such as the EROS, the MACHO and the OGLE projects have discovered a large number of eclipsing binaries in the extra galaxies and published their light curves.
Young-Woon Kang
doaj   +1 more source

TOI-1333Ab is on a well-aligned orbit

Astronomy & Astrophysics
Context. Spin-orbit obliquity measurements of hot-Jupiter systems constrain giant planet migration and tidal evolution. In binary systems, combining stellar obliquities with the orbit-orbit angle (γ) between the planetary and stellar companion orbits ...
Knudstrup E., Marcussen M. L., Albrecht S. H., Lundkvist M. S., Persson C. M.   +4 more
doaj   +1 more source

The Cosmic Stellar Birth and Death Rates

, 2006
The cosmic stellar birth rate can be measured by standard astronomical techniques. It can also be probed via the cosmic stellar death rate, though until recently, this was much less precise.
Ahn, Ando, Ando, Beacom, Bionta, Bisnovatyi-Kogan, Clayton, Fukugita, Hirata, Hopkins, John F. Beacom, Krauss, Malek, Milne, Mirizzi, Schiminovich, Strigari, Strigari, Watanabe, Woosley, Yoshida, Zhang, Zhang   +22 more
core   +2 more sources

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

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

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

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

An Outline of Stellar Astronomy [PDF]

Nature, 1948
THIS little book is designed, as the author unassumingly states, for readers who have "slightly more knowledge than that necessary for perusal of 'popular' astronomical literature". It is, in fact, a useful summary, remarkably complete for its size, of the present state of knowledge, and there will be many genuine astronomers, both amateur and ...
openaire   +1 more source

Magnetic Control of Chiral Hybridized Phonon Magnetic Moments in Ferrimagnets Fe2‐xZnxMo3O8

Advanced Functional Materials, EarlyView.
Helicity‐resolved magneto‐Raman spectroscopy reveals magnetic control of chiral phonon magnetic moments in polar ferrimagnet (ZnxFe2−xMo3O₈). Large spontaneous zero‐field phonon splittings, selective phonon–magnon coupling, and asymmetric Zeeman responses demonstrate that phonon chirality is governed by magnon‐phonon coupling and magnetization.
Youngsu Choi, Dirk Wulferding, Amit Pawbake, Clément Faugeras, Sivasakthi Kuppusamy, Raman Sankar, Gichan Son, Jeongwoo Kim, Kwang‐Yong Choi   +8 more
wiley   +1 more source