Results 11 to 20 of about 462 (193)

The spectroscopic Hertzsprung-Russell diagram [PDF]

Astronomy & Astrophysics, 2014
9 pages, 8 figures, Astronomy and Astrophysics, in ...
N. Langer, R. P. Kudritzki
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Observational Hertzsprung-Russell diagrams [PDF]

Astronomy & Astrophysics, 2018
Abstract: Context. Gaia Data Release 2 provides high-precision astrometry and three-band photometry for about 1.3 billion sources over the full sky. The precision, accuracy, and homogeneity of both astrometry and photometry are unprecedented. Aims.
Babusiaux, C, van Leeuwen, F, Barstow, MA, Jordi, C, Vallenari, A, Bossini, D, Bressan, A, Cantat-Gaudin, T, van Leeuwen, M, Brown, AGA, Prusti, T, de Bruijne, JHJ, Bailer-Jones, CAL, Biermann, M, Evans, DW, Eyer, L, Jansen, F, Klioner, SA, Lammers, U, Lindegren, L, Luri, X, Mignard, F, Panem, C, Pourbaix, D, Randich, S, Sartoretti, P, Siddiqui, HI, Soubiran, C, Walton, NA, Arenou, F, Bastian, U, Cropper, M, Drimmel, R, Katz, D, Lattanzi, MG, Bakker, J, Cacciari, C, Castaneda, J, Chaoul, L, Cheek, N, De Angeli, F, Fabricius, C, Guerra, R, Holl, B, Masana, E, Messineo, R, Mowlavi, N, Nienartowicz, K, Panuzzo, P, Portell, J, Riello, M, Seabroke, GM, Tanga, P, Thevenin, F, Gracia-Abril, G, Comoretto, G, Garcia-Reinaldos, M, Teyssier, D, Altmann, M, Andrae, R, Audard, M, Bellas-Velidis, I, Benson, K, Berthier, J, Blomme, R, Burgess, P, Busso, G, Carry, B, Cellino, A, Clementini, G, Clotet, M, Creevey, O, Davidson, M, De Ridder, J, Delchambre, L, Dell'Oro, A, Ducourant, C, Fernandez-Hernandez, J, Fouesneau, M, Fremat, Y, Galluccio, L, Garcia-Torres, M, Gonzalez-Nunez, J, Gonzalez-Vidal, JJ, Gosset, E, Guy, LP, Halbwachs, J-L, Hambly, NC, Harrison, DL, Hernandez, J, Hestroffer, D, Hodgkin, ST, Hutton, A, Jasniewicz, G, Jean-Antoine-Piccolo, A, Jordan, S, Korn, AJ, Krone-Martins, A, Lanzafame, AC, Lebzelter, T, Loeffler, W, Manteiga, M, Marrese, PM, Martin-Fleitas, JM, Moitinho, A, Mora, A, Muinonen, K, Osinde, J, Pancino, E, Pauwels, T, Petit, J-M, Recio-Blanco, A, Richards, PJ, Rimoldini, L, Robin, AC, Sarro, LM, Siopis, C, Smith, M, Sozzetti, A, Sueveges, M, Torra, J, van Reeven, W, Abbas, U, Abreu Aramburu, A, Accart, S, Aerts, C, Altavilla, G, Alvarez, MA, Alvarez, R, Alves, J, Anderson, RI, Andrei, AH, Anglada Varela, E, Antiche, E, Antoja, T, Arcay, B, Astraatmadja, TL, Bach, N, Baker, SG, Balaguer-Nunez, L, Balm, P, Barache, C, Barata, C, Barbato, D, Barblan, F, Barklem, PS, Barrado, D, Barros, M, Bartholome Munoz, S, Bassilana, J-L, Becciani, U, Bellazzini, M, Berihuete, A, Bertones, S, Bianchi, L, Bienayme, O, Blanco-Cuaresma, S, Boch, T, Boeche, C, Bombrun, A, Borrachero, R, Bouquillon, S, Bourda, G, Bragaglia, A, Bramante, L, Breddels, MA, Brouillet, N, Bruesemeister, T, Brugaletta, E, Bucciarelli, B, Burlacu, A, Busonero, D, Butkevich, AG, Buzzi, R, Caffau, E, Cancelliere, R, Cannizzaro, G, Carballo, R, Carlucci, T, Carrasco, JM, Casamiquela, L, Castellani, M, Castro-Ginard, A, Charlot, P, Chemin, L, Chiavassa, A, Cocozza, G, Costigan, G, Cowell, S, Crifo, F, Crosta, M, Crowley, C, Cuypers, J, Dafonte, C, Damerdji, Y, Dapergolas, A, David, P, David, M, de laverny, P, De Luise, F, Garofalo, A, Massari, D   +201 more
  +27 more sources

Asteroseismology Across the Hertzsprung–Russell Diagram [PDF]

Annual Review of Astronomy and Astrophysics, 2022
Asteroseismology has grown from its beginnings three decades ago to a mature field teeming with discoveries and applications. This phenomenal growth has been enabled by space photometry with precision 10–100 times better than ground-based observations, with nearly continuous light curves for durations of weeks to years, and by large-scale ground-based
D. W. Kurtz
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Planetary Engulfment in the Hertzsprung–Russell Diagram [PDF]

The Astrophysical Journal Letters, 2018
Abstract Planets accompany most Sun-like stars. The orbits of many are sufficiently close that they will be engulfed when their host stars ascend the giant branch. This Letter compares the power generated by orbital decay of an engulfed planet to the intrinsic stellar luminosity.
Morgan MacLeod, Matteo Cantiello, Melinda Soares-Furtado   +2 more
openalex   +4 more sources

Dynamical masses across the Hertzsprung–Russell diagram [PDF]

Monthly Notices of the Royal Astronomical Society
ABSTRACT We infer the dynamical masses of stars across the Hertzsprung–Russell (H–R) diagram using wide binaries from the Gaia survey. Gaia’s high-precision astrometry measures the wide binaries’ orbital motion, which contains the mass information. Using wide binaries as the training sample, we measure the mass of stars across the 2D H–R
Hsiang-Chih Hwang, Yuan-Sen Ting, Sihao Cheng, Joshua S. Speagle   +3 more
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Cool Stars in the Hertzsprung-Russell Diagram [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractAs the opening review to the focus meeting “Stellar Behemoths: Red Supergiants across the Local Universe”, I here provide a brief introduction to red supergiants, setting the stage for subsequent contributions. I highlight some recent activity in the field, and identify areas of progress, areas where progress is needed, and how such progress ...
J. Th. van Loon
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Gaia Data Release 2: Observational Hertzsprung-Russell diagrams

, 2018
[Abstract] Context. Gaia Data Release 2 provides high-precision astrometry and three-band photometry for about 1.3 billion sources over the full sky. The precision, accuracy, and homogeneity of both astrometry and photometry are unprecedented. Aims.
Gaia Collaboration, C. Babusiaux, F. van Leeuwen, M. A. Barstow, C. Jordi, A. Vallenari, D. Bossini, A. Bressan, T. Cantat-Gaudin, M. van Leeuwen, A. G. A. Brown, T. Prusti, J. H. J. de Bruijne, C. A. L. Bailer‐Jones, M. Biermann, D. W. Evans, L. Eyer, F. Jansen, S. A. Klioner, U. Lammers, L. Lindegren, X. Luri, F. Mignard, C. Panem, D. Pourbaix, S. Randich, P. Sartoretti, H. I. Siddiqui, C. Soubiran, N. A. Walton, F. Arenou, U. Bastian, M. Cropper, R. Drimmel, D. Katz, M. G. Lattanzi, J. Bakker, C. Cacciari, J. Castañeda, L. Chaoul, N. Cheek, F. Deangeli, C. Fabricius, R. Guerra, B. Holl, E. Masana, R. Messineo, N. Mowlavï, K. Nienartowicz, P. Panuzzo, J. Portell, M. Riello, G. M. Seabroke, P. Tanga, F. Thévenin, G. Gracia-Abril, G. Comoretto, M. Garcia-Reinaldos, D. Teyssier, M. Altmann, R. Andrae, M. Audard, I. Bellas-Velidis, K. Benson, J. Berthier, R. Blomme, P. W. Burgess, G. Busso, B. Carry, A. Cellino, G. Clementini, M. Clotet, O. L. Creevey, M. Davidson, J. Deridder, L. Delchambre, A. Dell’Oro, C. Ducourant, J. Fernández-Hernández, M. Fouesneau, Y. Frémat, L. Galluccio, Miguel García-Torres, J. González-Núñez, J. J. González-Vidal, E. Gosset, L. P. Guy, J. L. Halbwachs, N. C. Hambly, D. L. Harrison, J. Hernández, Daniel Hestroffer, S. T. Hodgkin, A. Hutton, G. Jasniewicz, A. Jean-Antoine-Piccolo, S. Jordan, A. J. Korn, A. Krone-Martins, A. C. Lanzafame   +99 more
  +6 more sources

Astronomy Lab I: Photometric Experiments for Physics Students [PDF]

Iranian Journal of Astronomy and Astrophysics, 2023
As physics laboratories are an integral part of the physics education across the globe, astronomy laboratories are also a necessary part of the astronomy education.
Reza Rezaei
doaj   +1 more source

A search for runaway stars in 12 Galactic supernova remnants

Astronomische Nachrichten, Volume 342, Issue 3, Page 553-577, March 2021., 2021
Runaway stars can result from core‐collapse supernovae in multiple stellar systems. If the supernova disrupts the system, the companion is ejected with its former orbital velocity. A clear identification of a runaway star can yield the time and place of the explosion, as well as orbital parameters of the pre‐supernova binary system.
Oliver Lux, Ralph Neuhäuser, Markus Mugrauer, Richard Bischoff   +3 more
wiley   +1 more source

Digital color codes of stars

Astronomische Nachrichten, Volume 342, Issue 3, Page 578-587, March 2021., 2021
Abstract Nowadays, publications in astrophysics are mainly published and read in digitized formats. Astrophysical publications in both research and in popular outreach often use colorful representations of stars to indicate various stellar types, that is, different spectral types or effective temperatures.
Jan‐Vincent Harre, René Heller
wiley   +1 more source