Results 31 to 40 of about 47,514 (302)

Establishing the nature of companion candidates to X-ray emitting late B-type stars

, 2007
The most favored interpretation for the detection of X-ray emission from late B-type stars is that these stars have a yet undiscovered late-type companion (or an unbound nearby late-type star) that produces the X-rays.
Hubrig, S., Huelamo, N., Marco, O., Schoeller, M., Stelzer, B.   +4 more
core   +1 more source

Dust origin in late-type dwarf galaxies: ISM growth vs. type II supernovae

, 2014
We re-evaluate the roles of different dust sources in dust production as a function of metallicity in late-type dwarf galaxies, with the goal of understanding the relation between dust content and metallicity. The dust content of late-type dwarf galaxies
Zhukovska, Svitlana
core   +1 more source

A close look at the Centaurus A group of galaxies III. Recent star formation histories of late-type dwarfs around M83 [PDF]

, 2011
We study the resolved stellar populations of dwarf galaxies in the nearby Centaurus A/M83 group of galaxies. Our goal is to characterize their evolutionary history and to investigate eventual similarities or differences with the dwarf population in other
A. A. Cole, Aloisi, Aparicio, Banks, Battinelli, Belokurov, Belokurov, Bouchard, Bouchard, Bradamante, Caldwell, Cardelli, Cash, Chabrier, Cignoni, Cole, Cole, Cole, Crnojević, Crnojević, Côté, Côté, Côté, D. Crnojević, Dohm-Palmer, Dohm-Palmer, Dohm-Palmer, Dolphin, Dotter, Dressler, Duquennoy, Durrell, Durrell, E. K. Grebel, Einasto, Elmegreen, Gallart, Georgiev, Gilmore, Girardi, Glatt, Glatt, Glatt, Grebel, Grebel, Grebel, Groenewegen, Grossi, Harris, Harris, Hirashita, Isserstedt, Jarosik, Jerjen, Jerjen, Karachentsev, Karachentsev, Karachentsev, Karachentsev, Karachentsev, Karachentsev, Karachentsev, Karachentseva, Kniazev, Koch, Koch, Koch, Koleva, Kotulla, Lee, Lee, Lee, Lee, Levesque, Maeder, Makarova, Makarova, Makarova, Marconi, Marigo, Mateo, Mazeh, McQuinn, Noël, Orban, Read, Recchi, Rejkuba, Sabbi, Scalo, Schlegel, Schulte-Ladbeck, Seiden, Sharina, Sirianni, Skillman, Smecker-Hane, Tautvaišienė, Tolstoy, Tolstoy, Tosi, Tosi, Trentham, van der Marel, van Dyk, Venn, Venn, Weisz, Weisz, Williams, Zaritsky, Zucker, Zucker, Zucker, Úbeda   +114 more
core   +4 more sources

Mapping the Skies of Ultracool Worlds: Detecting Storms and Spots with Extremely Large Telescopes

The Astrophysical Journal, 2023
Extremely large telescopes (ELTs) present an unparalleled opportunity to study the magnetism, atmospheric dynamics, and chemistry of very-low-mass (VLM) stars, brown dwarfs, and exoplanets.
Michael K. Plummer, Ji Wang
doaj   +1 more source

Dynamical population synthesis: Constructing the stellar single and binary contents of galactic field populations

, 2011
[abridged] The galactic field's late-type stellar single and binary population is calculated on the supposition that all stars form as binaries in embedded star clusters.
Bate, Bergfors, Binney, Boissier, Bressert, Calura, Calzetti, Carney, Connelley, de la Fuente Marcos, Delfosse, Diehl, Duchêne, Duchêne, Duquennoy, Fan, Fan, Fischer, Fisher, Fregeau, Ghez, Gieles, Goodwin, Goodwin, Grebel, Harris, Kohler, Kouwenhoven, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Köppen, Lada, Lada, Lada, Lada, Larsen, Larsen, Lee, Lee, Marks, Mayor, Michael Marks, Misiriotis, Moeckel, Muench, Murray, Naab, Oh, Parker, Pavel Kroupa, Peretto, Pflamm-Altenburg, Pflamm-Altenburg, Pflamm-Altenburg, Piskunov, Raghavan, Recchi, Reid, Robitaille, Scheepmaker, Schönrich, Simon, Smith, Teixeira, Walsh, Weidner, Weidner, Zepf   +74 more
core   +1 more source

TheEUVEOptical Identification Campaign II: Late-Type and White Dwarf Stars [PDF]

International Astronomical Union Colloquium, 1996
We present optical identifications of nine previously unidentified extreme ultraviolet (EUV) sources discovered during theExtreme Ultraviolet Explorer(EUVE) satellite surveys. The all-sky survey detected four of the sources and the more sensitive deep survey detected the other five sources.
N. Craig, A. Fruscione, J. Dupuis, M. Mathioudakis, J.J. Drake, M. Abbott, C. Christian, R. Green, T. Boroson, S.B. Howell   +9 more
openaire   +1 more source

Spectral classification of Pleiades brown dwarf candidates

, 2011
We report on the results of the spectroscopy of 10 objects previously classified as brown dwarf candidates via RIJHK colors by Eisenbeiss et al. (2009), who performed deep imaging observations on a 0.4 sq.deg. field at the edge of the Pleiades.
An, Bertin, Cruz, Cushing, Deacon, Eisenbeiss, Gizis, Hamilton, Hodgkin, Hog, Izzo, Kirkpatrick, Kirkpatrick, Lasker, Lawrence, Martín, Martín, Moualla, Pickles, Prosser, Rayner, Rebolo, Reid, Reid, Rieke, Robichon, Röser, Röser, Schilbach, Stauffer, Steele, van Leeuwen, Zacharias   +32 more
core   +1 more source

Characterizing the Cool KOIs. VI. H- and K-band Spectra of Kepler M Dwarf Planet-Candidate Hosts [PDF]

, 2014
We present H- and K-band spectra for late-type Kepler Objects of Interest (the "Cool KOIs"): low-mass stars with transiting-planet candidates discovered by NASA's Kepler Mission that are listed on the NASA Exoplanet Archive.
Baranec, Christoph, Becker, Juliette, Covey, Kevin R., Feiden, Gregory A., Hamren, Katherine, Johnson, John Asher, Law, Nicholas M., Lloyd, James P., Muirhead, Philip S., Price, Ellen M., Riddle, Reed, Rojas-Ayala, Bárbara, Schlawin, Everett, Thorp, Rachel, Vanderburg, Andrew   +14 more
core   +3 more sources

Stellar Atmospheric Parameters for Cool Dwarfs in Gaia Data Release 3

The Astrophysical Journal Supplement Series
We provide a catalog of atmospheric parameters for 1,806,921 cool dwarfs from Gaia Data Release 3 (DR3) that lie within the range covered by LAMOST cool dwarf spectroscopic parameters: 3200 K < T _eff < 4300 K, −0.8 < [M/H] < 0.2 dex, and 4.5 < log g < 5.
Cai-Xia Qu, A-Li Luo, Rui Wang, Hugh R. A. Jones, Bing Du, Xiang-Lei Chen, You-Fen Wang   +6 more
doaj   +1 more source

Two planetary systems with transiting Earth-sized and super-Earth planets orbiting late-type dwarf stars [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2018
ABSTRACTWe present two new planetary systems found around cool dwarf stars with data from the K2 mission. The first system was found in K2-239 (EPIC 248545986), characterized in this work as M3.0V and observed in the 14th campaign of K2. It consists of three Earth-sized transiting planets with radii of 1.1, 1.0, and 1.1 R⊕, showing a compact ...
Alonso, E. Diez, Hernandez, J. I. Gonzalez, Gomez, S. L. Suarez, Aguado, D. S., Gutierrez, C. Gonzalez, Mascareno, A. Suarez, Cabrera-Lavers, A., Gonzalez-Nuevo, J., Padron, B. Toledo, Gracia, J., Juez, F. J. de Cos, Rebolo, R.   +11 more
openaire   +3 more sources