Results 11 to 20 of about 598,532 (267)
Catalog of Integrated-light Star Cluster Light Curves in TESS
The Astronomical Journal, 2023 We present the first integrated-light, TESS-based light curves for star clusters in the Milky Way, Small Magellanic Cloud, and Large Magellanic Cloud. We explore the information encoded in these light curves, with particular emphasis on variability.
Tobin M. Wainer +12 more
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A New Statistical Approach to the Optical Spectral Variability in Blazars
Galaxies, 2016 We present a spectral variability study of a sample of about 25 bright blazars, based on optical spectroscopy. Observations cover the period from the end of 2008 to mid 2015, with an approximately monthly cadence.
Jose A. Acosta-Pulido +3 more
doaj +1 more source
RobPer: An R Package to Calculate Periodograms for Light Curves Based on Robust Regression
Journal of Statistical Software, 2016 An important task in astroparticle physics is the detection of periodicities in irregularly sampled time series, called light curves. The classic Fourier periodogram cannot deal with irregular sampling and with the measurement accuracies that are ...
Anita M. Thieler +2 more
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Photoelectic BV Light Curves of Algol and the Interpretations of the Light Curves [PDF]
Journal of Astronomy and Space Sciences, 1985 Standardized B and V photoelectric light curves of Algol are made with the observations obtained during 1982-84 with the 40-cm and the 61-cm reflectors of Yonsei University Observatory.
Ho-Il Kim
doaj
CCD Photometry of Contact Binary WZ Cephei [PDF]
Journal of Astronomy and Space Sciences, 2008 We present the full BVR light curves and five times of minima of WZ Cep to provides a complete photometric solution and to confirm the long term variation of the light curves.
Woo-Baik Lee +2 more
doaj +1 more source
Simple Method of Light Field Calculation for Shaping of 3D Light Curves
Photonics, 2023 We propose a method for generating three-dimensional light fields with given intensity and phase distributions using purely phase transmission functions.
Svetlana N. Khonina +4 more
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Spectral and Photometric Studies of NGC 7469 in the Optical Range
UniverseThe galaxy NGC 7469 is a bright infrared source with an active galactic nucleus (AGN) and an intense star-forming region with a radius of approximately 500 parsecs, where the star formation rate is estimated to be 20–50 M⊙yr−1.
Saule Shomshekova +5 more
doaj +1 more source
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
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Population Ecology, EarlyView.Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi +3 more
wiley +1 more source
Spectral and Photometric Studies of NGC 3516 in the Optical Range
GalaxiesThis paper presents the results of the photometric and spectral monitoring of the galaxy NGC 3516, which is an active galactic nucleus (AGN) of type Sy 1.5 with a changing look.
Saule Shomshekova +7 more
doaj +1 more source