Results 11 to 20 of about 199,190 (345)

B-emission Stars in Southern Sky Observed in Bosscha Observatory: Spectroscopic Study of Hα Spectral Line Variability

Journal of Mathematical and Fundamental Sciences, 2019
Hα line variations of 8 B-emission (Be) stars are presented. Stars that are listed in the Bright Star Catalogue were observed in 2009 at the Bosscha Observatory, Lembang, Indonesia. It was found that 4 stars showed phase changing from Be double-peaked to
Aprilia Aprilia, Hakim Luthfi Malasan, Geavani Eva Ramadhania, Agus Triono Puri Jatmiko, Mochamad Irfan, Dhimaz Gilang Ramadhan, Ade Nur Istiqomah, Evan Irawan Akbar   +7 more
doaj   +3 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

Line emission from circumstellar disks around A stars [PDF]

, 2002
The nature of the tenuous disks around A stars has raised considerable controversy in the literature during the past decade. The debate whether or not the disk around beta Pictoris contains gaseous molecular hydrogen is only the most recent example ...
Augereau, Barrado y Navascués, Cheng, Chini, Chini, Chu, Deleuil, Dent, Dent, Dutrey, E. F. van Dishoeck, Flower, Freudling, G.-J. van Zadelhoff, Habing, Habing, Heap, Hogerheijde, Holland, I. Kamp, Jolly, Kamp, Kamp, Keenan, Kurucz, Launay, Lecavelier des Etangs, Li, Liseau, Liseau, Mendoza, Olofsson, R. Stark, Roberge, Savoldini, Schinke, Schröder, Stauffer, Swinyard, Thi, Thi, Yamashita, Zuckerman   +42 more
core   +5 more sources

Emission-line stars discovered in the UKST H-alpha survey of the Large Magellanic Cloud; Part 1: Hot stars [PDF]

, 2012
We present new, accurate positions, spectral classifications, radial and rotational velocities, H-alpha fluxes, equivalent widths and B,V,I,R magnitudes for 579 hot emission-line stars (classes B0 - F9) in the Large Magellanic Cloud which include 469 new
Acke, Andrews, Andrillat, Beaulieu, Bjorkman, Bjorkman, Bland-Hawthorn, Bohannan, Bowyer, Butler, Böhm, Böhm, Cassinelli, Cohen, Corcoran, Cranmer, Dachs, Dachs, Draper, Feast, Frew, Gordon, Grebel, Grebel, Gullbring, Hamann, Hambly, Hanuschik, Hanuschik, Hartigan, Hartmann, Henize, Henyey, Herbig, Hernández, Hillenbrand, Hubert, Hubert-Delplace, Hubrig, Hughes, Hummel, Hutsemékers, Jacoby, Jacoby, Jaschek, Jaschek, Kaler, Keller, Keller, Keller, Kontizas, Kurtz, Königl, Lada, Larson, Le Borgne, Lewis, Lindsay, Lindsay, Lumb, Melchior, Mennickent, Miroshnichenko, Morgan, Murai, Muzerolle, Muzerolle, Muzerolle, Olsen, Parker, Parker, Parker, Pasquini, Pickles, Poeckert, Porter, Porter, Quentin A. Parker, Quirrenbach, Reid, Reid, Reid, Reid, Rivinius, Rivinius, Rohlfs, Sabogal, Schwering, Silaj, Silva, Skrutskie, Slettebak, Stanghellini, Struve, Szymański, Tonry, Townsend, Townsend, Turnshek, Tycner, Uchida, Udalski, Underhill, Van Winckel, Viera, Wade, Warren A. Reid, Waters, Wisniewski   +108 more
core   +2 more sources

Emission-Line Stars in the Vilnius Photometric System [PDF]

Open Astronomy, 1998
Straižys V., Eimontas A., Sūdžius J., Bartašiūtė S., Černis K.   +4 more
doaj   +2 more sources

Photometric and spectroscopic study of five pre-main sequence stars in the vicinity of NGC 7129 [PDF]

Serbian Astronomical Journal, 2019
We present results from long-term optical photometric and spectroscopic observations of five pre-main sequence stars, located in the vicinity of the bright nebula NGC 7129.
Semkov E.H., Ibryamov S.I., Peneva S.P.
doaj   +1 more source

A Spitzer survey of mid-infrared molecular emission from protoplanetary disks I: Detection rates [PDF]

, 2010
We present a Spitzer InfraRed Spectrometer search for 10-36 micron molecular emission from a large sample of protoplanetary disks, including lines from H2O, OH, C2H2, HCN and CO2.
Alcala, Blake, Bouvier, Brittain, Brittain, Cami, Casali, Colette Salyk, Coulson, Dullemond, Dzib, Evans, Feigelson, Fernandez, Furlan, Furlan, Geoffrey A. Blake, Glassgold, Gorti, Hartmann, Hernández, Igea, Ireland, Joan Najita, John S. Carr, Justtanont, Kamp, Kessler-Silacci, Klaus M. Pontoppidan, Lahuis, Mandell, Manoj, Martín, Meijerink, Meijerink, Najita, Najita, Nguyen, Oudmaijer, Pascucci, Pontoppidan, Pontoppidan, Prato, Rowin Meijerink, Salyk, Salyk, Siess, The, Wilking, Willacy   +49 more
core   +2 more sources

THE MASSIVE STELLAR POPULATION IN THE DWARF STARBURST GALAXIES

Odessa Astronomical Publications, 2017
The analysis of the long-slit spectral observations of 39 Wolf-Rayet (WR) galaxies with heavy element mass fraction ranging over 2 orders of magnitudes from Z☉/50 to 2Z☉ are presented.
N. G. Guseva
doaj   +1 more source

The Orbital and Physical Properties of Five Southern Be+sdO Binary Systems

The Astronomical Journal, 2023
Close binary interactions may play a critical role in the formation of the rapidly rotating Be stars. Mass transfer can result in a mass gainer star spun up by the accretion of mass and angular momentum, while the mass donor is stripped of its envelope ...
Luqian Wang, Douglas R. Gies, Geraldine J. Peters, Zhanwen Han   +3 more
doaj   +1 more source

Cooling of strange stars in the color-flavor locked phase with a rotating crust Cooling of strange stars in the color-flavor locked phase with a rotating crust [PDF]

, 2006
The presence of the color-flavor locked (CFL) phase strongly suppresses the neutrino emission processes and the quark specific heat. As a result the cooling of the strange stars in the CFL phase is dominated by deconfinement heating and surface emission.
Xiaoping, Zheng, Yunwei, Yu, Yunwei, Zheng Xiaoping Yu   +2 more
core   +1 more source