Results 81 to 90 of about 11,568,785 (350)
Spectral Classification of Faint Carbon Stars
Open Astronomy, 2003 R-N classification of 187 faint carbon stars is based on the classical criteria adjusted to the yellow-red spectral region, with two new criteria added - the ratios of the red CN bands 6206/6332 (Å) and 6478/6631 (Å).
Eglitis I., Eglite M., Balklavs A.
doaj +1 more source
The First Comprehensive Photometric Study of the Neglected Binary System V345 Cassiopeiae [PDF]
Journal of Astronomy and Space Sciences, 2013 We present the first BVRI CCD photometric observations of V345 Cas made on 22 nights during the observing seasons in 2007-2008. Our light curves, resembling those of EB-type binary stars, are analyzed with the 2003 version of the Wilson- Devinney ...
Min-Ji Jeong, Chun-Hwey Kim
doaj +1 more source
Open Astronomy, 2003 We present a new color index vs. absolute magnitude calibration of 2MASS JHK photometry. For the A0 to ~G5 and M segments of the main sequence information on the amount of interstellar extinction and its location in space may be obtained.
Knude Jens, Fabricius Claus
doaj +1 more source
The First Photometric Study of NSVS 1461538: A New W-subtype Contact Binary with a Low Mass Ratio and Moderate Fill-out Factor [PDF]
Journal of Astronomy and Space Sciences, 2016 New multiband BVRI light curves of NSVS 1461538 were obtained as a byproduct during the photometric observations of our program star PV Cas for three years from 2011 to 2013.
Hyoun-Woo Kim +4 more
doaj +1 more source
Fundamental Parameters and Models of Stellar Atmospheres [PDF]
Symposium - International Astronomical Union, 1985 The use of photometric and spectroscopic criteria, calibrated by model-atmosphere calculations, for determining effective temperatures, surface gravities and chemical compositions of stars is illustrated and commented on. The accuracy that can be obtained today in such calibrations is discussed, as well as possible ways of improving this accuracy ...
Bengt Gustafsson, Uffe Graae-Jørgensen
openaire +2 more sources
Moving in the Dark: Enlightening the Spatial Population Ecology of European Cave Salamanders
Population Ecology, EarlyView.We assessed individual interactions, movement ecology and activity patterns of a subterranean population of Speleomantes strinatii, applying spatial capture–recapture modeling to a photographic dataset of 104 individuals. ABSTRACT Space use and movement are fundamental aspects of organisms' ecology, mirroring individual fitness, behavior, and life ...
Giacomo Rosa +2 more
wiley +1 more source
Fundamental parameters from precision tests [PDF]
Journal of Physics G: Nuclear and Particle Physics, 2002 9 pages, 4 figures, Talk presented at the Symposium in Honor of Alberto Sirlin, NYU, NY, October ...
openaire +4 more sources
Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors
Population Ecology, EarlyView.Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley +1 more source
Operational definition of (brane induced) space-time and constraints on the fundamental parameters [PDF]
, 1999 First we contemplate the operational definition of space-time in four dimensions in light of basic principles of quantum mechanics and general relativity and consider some of its phenomenological consequences.
Michael Maziashvili +53 more
core +2 more sources
On the Component Masses of Visual Binaries [PDF]
Serbian Astronomical Journal, 2010 In the Sixth Catalog of Orbits of Visual Binary Stars we found those belonging to the Main Sequence to form a sample containing 432 visual binaries. Their total masses were obtained dynamically, i.e.
Ninkovic, S., Cvetkovic, Z.
doaj +3 more sources