Results 21 to 30 of about 66,082 (125)

Observational evidence for the origin of X-ray sources in globular clusters [PDF]

, 2007
Low-mass X-ray binaries, recycled pulsars, cataclysmic variables and magnetically active binaries are observed as X-ray sources in globular clusters. We discuss the classification of these systems, and find that some presumed active binaries are brighter
Cees Bassa, Dave Pooley, Frank Verbunt, Heggie, Hünsch, McCluskey, Ruggles, van der Sluys, Verbunt, Verbunt, Verbunt, Webb   +11 more
core   +2 more sources

Automated Morgan Keenan Classification of Observed Stellar Spectra Collected by the Sloan Digital Sky Survey Using a Single Classifier [PDF]

, 2019
The classification of stellar spectra is a fundamental task in stellar astrophysics. Stellar spectra from the Sloan Digital Sky Survey are applied to standard classification methods, k-nearest neighbors and random forest, to automatically classify the ...
Andonie, Răzvan, Brice, Michael J.
core   +1 more source

Detecting Quasars in Large-Scale Astronomical Surveys

, 2011
We present a classification-based approach to identify quasi-stellar radio sources (quasars) in the Sloan Digital Sky Survey and evaluate its performance on a manually labeled training set.
Bomanns, Dominik, Dettmar, Ralf-Jürgen, Gieseke, Fabian, Kramer, Oliver, Polsterer, Kai Lars, Thom, Andreas, Vahrenhold, Jan, Zinn, Peter-Christian   +7 more
core   +1 more source

The stellar population of the star forming region G61.48+0.09

, 2009
- Context: We present the results of a near-infrared photometric and spectroscopic study of the star forming region G61.48+0.09. - Aims: The purpose of this study is to characterize the stellar content of the cluster and to determine its distance ...
A. Font-Ribera, A. Herrero, A. Lenorzer, A. Marín-Franch, Andrillat, Aparicio, Benjamin, Bica, Bik, Borissova, Breger, Castelli, Cesaroni, Chini, Churchwell, Clark, Clark, Clark, Comerón, Comerón, D. Figer, Davies, de Wit, Deharveng, Dehnen, Ducati, Dutra, Eikenberry, F. Najarro, Figer, Figer, Figer, Figer, Fitzpatrick, Froebrich, Garay, Gehrz, Hanson, Hanson, Hanson, Hanson, Herrero, Herrero, Humphreys, Jiang, Johnson, Kiminki, Knödlseder, Koornneef, Kudritzki, Larsen, López-Corredoira, Martins, Massey, Massey, Massey, Mathys, Mercer, Messineo, Meynet, Pietrinferni, Puga, Puls, Reifenstein, Repolust, Rieke, Rieke, S. Ramirez, Sanders, Santolaya-Rey, Schaller, Skrutskie, Solomon, Stetson, van den Bergh, Walborn, Walborn, Wallace, Wallace, Wegner, Zhu   +80 more
core   +1 more source

Advances in Spectral Classification [PDF]

, 2010
In this article we give an overview of the developments in the field of spectral classification and its continued importance in the fields of stellar and galactic evolution.
Giridhar, Sunetra
core  

ELUCID IV: Galaxy Quenching and its Relation to Halo Mass, Environment, and Assembly Bias

, 2017
We examine the quenched fraction of central and satellite galaxies as a function of galaxy stellar mass, halo mass, and the matter density of their large scale environment.
Bosch, Frank C. van den, Chen, Sihan, Cui, Weiguang, Huang, Shuiyao, Jing, Yipeng, Kang, Xi, Li, Guoliang, Li, Shijie, Lim, S. H., Lin, Weipeng, Lu, Yi, Mo, H. J., Shi, Feng, Tweed, Dylan, Wang, Enci, Wang, Huiyuan, Wei, Chengliang, Yang, Xiaohu, Yang, Yang, Zhang, Youcai   +19 more
core   +1 more source

Automated classification of stellar spectra [PDF]

, 2020
Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2020, Tutor: Josep Maria Solanes MajúaWe have analyzed the performance of a PCA-based automated classifier of stellar spectra into the MK system, using as benchmark ...
Jiménez Palau, Cristina
core  

Notes on Stellar Classification [PDF]

, 1915
Norman Lockyer
openalex   +3 more sources

Probing the dusty stellar populations of the Local Volume Galaxies with JWST/MIRI

, 2017
The Mid-Infrared Instrument (MIRI) for the {\em James Webb Space Telescope} (JWST) will revolutionize our understanding of infrared stellar populations in the Local Volume.
Glasse, Alistair, Jones, Olivia C., Justtanont, Kay, Meixner, Margaret   +3 more
core   +1 more source

Flicker as a tool for characterizing planets through Asterodensity Profiling

, 2014
Variability in the time series brightness of a star on a timescale of 8 hours, known as 'flicker', has been previously demonstrated to serve as a proxy for the surface gravity of a star by Bastien et al. (2013).
Bastien, Fabienne A., Buchhave, Lars A., Chaplin, William J., Huber, Daniel, Kipping, David M., Stassun, Keivan G.   +5 more
core   +1 more source