Results 51 to 60 of about 5,486 (209)

SDSS J141624.08+134826.7: A Nearby Blue L Dwarf From the Sloan Digital Sky Survey [PDF]

, 2009
We present the discovery of a bright (J = 13.1 mag) nearby L6 dwarf found in a search for L-type ultracool subdwarfs in the Sloan Digital Sky Survey (SDSS) Data Release 7.
Abazajian, Allard, Bertin, Bessell, Bochanski, Borysow, Bowler, Brendan P. Bowler, Brott, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burrows, Burrows, Burrows, Chiu, Costa, Cruz, Cruz, Cruz, Cushing, Dahn, Dupuy, Faherty, Geballe, Golimowski, Kirkpatrick, Knapp, Leggett, Liu, Liu, Lodders, Metchev, Michael C. Liu, Radigan, Ralchenko, Reid, Reid, Sivarani, Stephens, Tinney, Trent J. Dupuy, Venn, Weck, York   +46 more
core   +1 more source

COOL SUBDWARF INVESTIGATIONS. I. NEW THOUGHTS ON THE SPECTRAL TYPES OF K AND M SUBDWARFS [PDF]

The Astronomical Journal, 2008
Using new spectra of 88 K and M-type subdwarfs, we consider novel methods for assigning their spectral types and take steps toward developing a comprehensive spectral sequence for subdwarf types K3.0 to M6.0. The types are assigned based on the overall morphology of spectra covering 6000Åto 9000Å.
Jao, Wei-Chun, Henry, Todd J., Beaulieu, Thomas D., Subasavage, John P.   +3 more
openaire   +2 more sources

Automated identification of 2612 late-k and M dwarfs in the LAMOST commissioining data using the classification template fits

, 2015
We develop a template-fit method to automatically identify and classify late-type K and M dwarfs in spectra from the LAMOST. A search of the commissioning data, acquired in 2009-2010, yields the identification of 2612 late-K and M dwarfs.
Hou, Jinliang, Huo, Zhiying, Lepine, Sebastien, Liu, Xiaowe, Shen, Shyin, Xiang, Maosheng, Yuan, Haibo, Zhang, Huawai, Zhang, Huihua, Zhong, Jing   +9 more
core   +1 more source

A Series of Subdwarf Atmospheres.

The Astrophysical Journal Supplement Series, 1961
A series of model stellar atmospheres, representing stars of low heavy- element content, is tabulated. Characteristics of the continua of the models, including (U,B,V) colors and bolometric corrections, are discussed and compared with observations. (auth)
Thomas L. Swihart, David Fischel
openaire   +1 more source

The EC14026 Stars — Pulsating Hot Subdwarfs [PDF]

Symposium - International Astronomical Union, 1998
The Edinburgh-Cape Blue Object Survey (Stobie et al. 1997a) is a southern hemisphere survey to discover hot, blue stellar objects brighter than B=18 at galactic latitudes more than 30° from the galactic plane. The main categories of object detected are hot subdwarfs, white dwarfs, blue horizontal branch stars, apparently normal B stars, cataclysmic ...
C. Koen, D. O'Donoghue, D. Kilkenny, R.S. Stobie   +3 more
openaire   +1 more source

Hot subdwarf stars from the Hamburg Quasar Survey

Astronomy & Astrophysics
Hot subluminous stars (subdwarf B&O; sdB, sdO) are evolved low mass stars originating from red giants that lost their envelope almost entirely. The multitude of observed phenomena imply that several pathways may form hot subdwarfs, most involving close ...
Heber U., Kufleitner L., Dorsch M., Latour M., Dawson H., Mattig F., Geier S.   +6 more
doaj   +1 more source

Pulsations driven by the ɛ-mechanism in post-merger remnants: First results

EPJ Web of Conferences, 2013
Helium-rich subdwarfs are a rare subclass of hot subdwarf stars which constitute a small and inhomogeneous group showing varying degrees of helium enrichment. Only one star, LS IV °14 116 has been found to show multiperiodic luminosity variations.
Zhang X., Córsico A.H., Bertolami M.M. Miller, Althaus L.G., Jeffery C.S.   +4 more
doaj   +1 more source

Mass Distribution for Single-lined Hot Subdwarf Stars in LAMOST

The Astrophysical Journal, 2023
Masses for 664 single-lined hot subdwarf stars identified in LAMOST were calculated by comparing synthetic fluxes from spectral energy distribution with observed fluxes from a Virtual Observatory service.
Zhenxin Lei, Ruijie He, Péter Németh, Xuan Zou, Huaping Xiao, Yong Yang, Jingkun Zhao   +6 more
doaj   +1 more source

Investigation of the Nature of the B[e] Star CI Cam in the Optical Range

Galaxies
The B[e] phenomenon is observed in a wide range of stars at various evolutionary stages. Its nature remains uncertain. The B[e] phenomenon is defined as the simultaneous presence of low-excitation forbidden line emission and strong infrared excess in the
Elena A. Barsukova, Vitaly P. Goranskij, Aleksandr N. Burenkov, Ilya A. Yakunin   +3 more
doaj   +1 more source

Chemical fingerprints of He-sdO stars

Open Astronomy, 2018
The chemical composition of helium-rich hot subluminous O stars plays an important role to understand and model their formation history. We present a spectroscopic analysis of four He-sdO stars,CD-31° 4800, [CW83] 0904- 02, LSS 1274 and LS IV +10° 9. The
Schindewolf Markus, Németh Peter, Heber Ulrich, Battich Tiara, Bertolami Marcelo M. Miller, Latour Marilyn   +5 more
doaj   +1 more source