Results 1 to 10 of about 44,379 (345)

Spectroscopic survey of emission-line stars – I. B[e] stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
15 pages, 7 figures, accepted for publication in ...
Aret, Anna, Kraus, Michaela, Šlechta, Miroslav   +2 more
openaire   +4 more sources

A Catalog of 45,206 Hα Emission-line Stars from LAMOST MRS DR7

The Astrophysical Journal Supplement Series
Stars that exhibit prominent emission lines in their spectra are referred to as emission-line stars, encompassing a wide range of stellar types and indicative of intriguing physical properties.
Lihuan Yu, Jiangdan Li, Jinliang Wang, Tongyu He, Zhanwen Han   +4 more
doaj   +2 more sources

The surface magnetic activity of the weak-line T Tauri stars TWA 9A and V1095 Sco [PDF]

, 2018
International audienceWe present a detailed analysis of high-resolution spectropolarimetric observations of the weak-line T Tauri stars (wTTSs) TWA 9A and V1095 Sco as part of a wider survey of magnetic properties and activity in weak-line T Tauri stars,
Folsom, C. P., Mengel, M., Hussain, G. A. J., Wright, D., Nicholson, B. A., Donati, J.-F., Carter, B. D.   +6 more
core   +1 more source

X-ray emission from massive stars: lessons learned and remaining mysteries [PDF]

, 2021
Nearly all types of massive stars are known to display X-ray emission at some level. Tremendous insight into this phenomenon has been gained thanks to the sensitivity of the current generation of X-ray satellites and X-ray observations are nowadays an ...
Rauw, Grégor
core   +1 more source

Studying the UV Mg II Resonance Lines in 20 Be Stars

Open Astronomy, 2011
Using the GR model, we analyze the UV Mg II resonance lines in the spectra of 20 Be stars of different spectral subtypes, in order to detect the presence of satellite or discrete absorption components. The values of some physical parameters – rotational,
Antoniou A., Stathopoulos D., Danezis E., Lyratzi E.   +3 more
doaj   +1 more source

Profiles of Emission Lines in be Stars

The Astrophysical Journal, 1972
Study of the broadening functions resulting from a gaseous ring in circular motion around a star according to Kepler's law. When the distribution in the gaseous ring has a circular symmetry in the equatorial plane, the broadening profile is related to the surface density distribution along the radius by an integral equation which can be transformed ...
openaire   +1 more source

Laboratory astrophysics : investigation of planetary and astrophysical maser emission

, 2013
This paper describes a model for cyclotron maser emission applicable to planetary auroral radio emission, the stars UV Ceti and CU Virginus, blazar jets and astrophysical shocks.
Ronald K, Phelps, A.D.R., Phelps, Alan, Kellett BJ, McConville SL, Phelps ADR, Speirs DC, Ronald, Kevin, McConville, S.L., Cross, Adrian, Cairns RA, Speirs, D.C., Cairns, R Alan, Cross, A.W., Cross AW, Kellett, Barry, McConville, Sandra, Cairns, R.A., Bingham, Robert, Vorgul I, Vorgul, Irena, Kellett, B.J., Ronald, K., Bingham R, Spiers DC, Vorgul, I., Speirs, David, Bingham, R.   +27 more
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Orbits and outflows of emission-line stars

, 2021
The optical spectra of some stars exhibit spectral lines in emission, which is characteristic of them having powerful radiatively driven winds. These stars are known as emission-line stars. In this thesis, I study the orbits and outflows of the most luminous and massive emission-line stars: Luminous Blue Variables and Wolf-Rayet stars.
openaire   +2 more sources

Broad line emission from iron K- and L-shell transitions in the active galaxy 1H 0707-495

, 2009
Since the 1995 discovery of the broad iron K-line emission from the Seyfert galaxy MCG-6-30-15 (ref. 1), broad iron K lines have been found in emission from several other Seyfert galaxies, from accreting stellar-mass black holes and even from accreting ...
T. Boller, Reynolds, C., Tanaka, Y, Larsson, J., Reynolds, C.S., Boller, T., Zoghbi, A., Y. Tanaka, G. Miniutti, Brandt, W.N., Zoghbi, A, Blustin, A., Reis, R.C., W. N. Brandt, Ponti, G, Ross, R., Uttley, P., Cadallero-Garcia, M., C. S. Reynolds, Blustin, A. J., Caballero-Garcia, M.D., Young, A.J., P. Uttley, Reynolds, C.S, Miller, J.M., Ross, R.R., A. C. Fabian, Uttley, P, Tanaka, Y., Young, A.J, L. C. Gallo, J. M. Miller, Miniutti, G, Brandt, W. N., G. Ponti, Fabian, A.C., Brandt, W, Blustin, A.J, Reis, R., Reis, R. C., Blustin, A.J., A. J. Blustin, J. Larsson, Ross, R. R., Miller, J.M, A. Zoghbi, R. C. Reis, M. D. Caballero-Garcia, A. J. Young, Ross, R.R, Miller, Jon M., Brandt, W., Gallo, L. C., Fabian, A., Caballero-Garcia, M. D., Ponti, G., Miniutti, G., Larsson, J, R. R. Ross, Gallo, L., Young, A., Fabian, A.C, Fabian, Andy C., Caballero-Garcia, M.D, Boller, T, Reynolds, Christopher S., Miniutti, Giovanni, Gallo, L.C., Miller, J., Reis, R.C, Young, A. J.   +70 more
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Emission Lines in Star Forming Galaxies [PDF]

Symposium - International Astronomical Union, 1995
Magris et al. (1993, Proceedings of the ESO/OHP Workshop on Dwarf Galaxies, ed. G. Meylan) have combined the spectral evolution population synthesis code of Bruzual & Charlot (1993, ApJ 405, 538) with the multipurpose photoionization-shock code MAPPINGS (Binette et al.
Gustavo A. Bruzual, Gladis C. Magris
openaire   +1 more source