Results 121 to 130 of about 7,790 (232)

THE ALLWISE MOTION SURVEY AND THE QUEST FOR COLD SUBDWARFS [PDF]

, 2014
The AllWISE processing pipeline has measured motions for all objects detected on Wide-field Infrared Survey Explorer (WISE) images taken between 2010 January and 2011 February.
J. Kirkpatrick, A. Schneider, S. Fajardo-Acosta, C. Gelino, G. Mace, E. Wright, S. Logsdon, I. McLean, M. Cushing, M. Skrutskie, P. Eisenhardt, D. Stern, M. Baloković, A. Burgasser, J. Faherty, G. Lansbury, J. Rich, N. Skrzypek, J. Fowler, R. Cutri, F. Masci, T. Conrow, C. Grillmair, H. McCallon, C. Beichman, K. Marsh   +25 more
semanticscholar   +1 more source

The population of hot subdwarf stars studied with Gaia II. The Gaia DR2 catalogue of hot subluminous stars

, 2018
Based on data from the ESA Gaia Data Release 2 (DR2) and several ground-based, multi-band photometry surveys we compiled an all-sky catalogue of $39\,800$ hot subluminous star candidates selected in Gaia DR2 by means of colour, absolute magnitude and ...
Fusillo, N. P. Gentile, Geier, S., Marsh, T. R., Raddi, R.   +3 more
core   +1 more source

High-resolution spectroscopic atlas of M subdwarfs. Effective temperature and metallicity [PDF]

, 2014
Context. M subdwarfs are metal poor and cool stars. They are important probes of the old galactic populations. However, they remain elusive due to their low luminosity. Observational and modeling efforts are required to fully understand their physics and
A. Rajpurohit, C. Reylé, F. Allard, R. Scholz, D. Homeier, M. Schultheis, A. Bayo, A. Bayo   +7 more
semanticscholar   +1 more source

HR6819: a puffed-up stripped star system challenging stable mass transfer theory

Astronomy & Astrophysics
Context. HR6819 is the first system with a puffed-up low-mass stripped star + a classical Be star whose nature has been confirmed by optical interferometry.
Picco A., Marchant P., Sana H., Bodensteiner J., Shenar T., Frost A. J., Deshmukh K., Mombarg J. S. G., Pauli D., Willcox R., Kemp A.   +10 more
doaj   +1 more source

New High Proper Motion Stars from the Digitized Sky Survey. II. Northern Stars with 0.5

, 2003
In a continuation of our systematic search for high proper motion stars in the Digitized Sky Survey, we have completed the analysis of northern sky fields at galactic latitudes above 25 degrees.
Hog E., Michael M. Shara, R. Michael Rich, Sbastien Lpine, Scholz R.-D.   +4 more
core   +1 more source

A New Class of Roche Lobe–filling Hot Subdwarf Binaries [PDF]

, 2020
Thomas Kupfer, Evan B. Bauer, Kevin B. Burdge, Jan van Roestel, Eric C. Bellm, Jim Fuller, JJ Hermes, Thomas R. Marsh, Lars Bildsten, Shrinivas R. Kulkarni, E. S. Phinney, Thomas A. Prince, Paula Szkody, Yuhan Yao, Andreas Irrgang, Ulrich Heber, David Schneider, Vik S. Dhillon, Gabriel Murawski, Andrew J. Drake, Dmitry A. Duev, Michael Feeney, Matthew J. Graham, Russ R. Laher, S. P. Littlefair, A. A. Mahabal, Frank J. Masci, Michael Porter, Dan Reiley, Hector Rodriguez, Ben Rusholme, David L. Shupe, Maayane T. Soumagnac   +32 more
openalex   +1 more source

The massive hot subdwarf binary LAMOST J065816.72+094343.1

Astronomy & Astrophysics
Context. Massive short-period binaries involving hot subdwarf stars (sdO/Bs) are rare but very relevant to constraining pathways for binary star evolution.
Mattig F., Barlow B. N., Liu D., Dorsch M., Geier S., Pritzkuleit M., Dawson H., Wang B., Schaffenroth V., Kupfer T., Derbyshire C., Barocci-Faul S.   +11 more
doaj   +1 more source

Hot subdwarf formation: Confronting theory with observation

EPJ Web of Conferences, 2013
The formation of hot subdwarf stars is still unclear. Both single-star and binary scenarios have been proposed to explain the properties of these evolved stars situated at the extreme blue end of the horizontal branch. The observational evidence gathered
Geier S.
doaj   +1 more source

High-velocity streams in the Milky Way halo with the SDSS and GSC-II kinematic survey

EPJ Web of Conferences, 2012
We explore the stellar halo of the Milky Way to search for fossil signatures of past mergers, consisting of streams of particles torn from their progenitors during the process of hierarchical merging.
Spagna A., Smart R.L., Lattanzi M.G., Re Fiorentin P., Beers T.C., Curir A.   +5 more
doaj   +1 more source

SSSPM J1444-2019: an extremely high proper motion, ultracool subdwarf

, 2004
We present the discovery of a new extreme high proper motion object (3.5 arcsec/year) which we classify as an ultracool subdwarf with [M/H] = -0.5. It has a formal spectral type of sdM9 but also shows L-type features: while the VO bands are completely ...
Baraffe, Baraffe, Burgasser, Burgasser, Chiba, Digby, Epchtein, Gizis, Hambly, Hambly, Johnson, Lépine, M. J. McCaughrean, McCaughrean, N. Lodieu, R.-D. Scholz, Reid, Scholz, Scholz, Scholz, Teegarden, Tinney, Tinney   +22 more
core   +1 more source