Model Atmosphere and Kinematical Analyses of Early-Type, High Galactic Latitude Stellar Candidates from the UKST UBVRI Survey

Abstract

view Abstract Citations (14) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Model Atmosphere and Kinematical Analyses of Early-Type, High Galactic Latitude Stellar Candidates from the UKST UBVRI Survey Hambly, N. C. ; Conlon, E. S. ; Dufton, P. L. ; Keenan, F. P. ; Little, J. E. ; Miller, L. Abstract From the UKST UBVRI survey, six high Galactic latitude stars have been previously identified which may be young hydrogen-burning objects. Using high-dispersion optical spectra, model atmosphere analyses are presented for these targets. Two have normal or nearly normal Population I chemical compositions, one appears to be subluminous while the remaining three are possibly normal late B-type stars. A kinematic analysis indicates that one star having normal parameters is an excellent candidate for formation in the halo, having an evolutionary age an order of magnitude less than the time required for it to attain its current position following ejection from the Galactic disk. A preliminary analysis implies that there may currently be a few thousand normal B-type stars in the Galactic halo with z-distances from the plane of the Galaxy in the range 3 < Ζ < 22 kpc. Publication: The Astrophysical Journal Pub Date: November 1993 DOI: 10.1086/173349 Bibcode: 1993ApJ...417..706H Keywords: STARS: ABUNDANCES; STARS: ATMOSPHERES; STARS: EARLY-TYPE; STARS: EVOLUTION full text sources ADS | data products SIMBAD (5) Related Materials (2) Source Software: 2014ascl.soft06017W Used in: 1987MNRAS.225..761F