부산대학교 도서관

HD 67044 currently assigned a B8 spectral type is one of the slowly rotating B stars situated in the northern hemisphere which we are currently observing. The selection criteria for this sample of stars are a declination higher than -15^o , spectral class B8 or B9, luminosity class V or IV, and a magnitude V brighter than 7.85. Most of the stars of this B8-9 sample have just recently been observed in December 2014. We are currently performing a careful abundance analysis study of high resolution high S/N ratio spectra of these objects and sort them out into chemically normal stars (ie. whose abundances do not depart more than +- 0.15 dex from solar), new spectroscopic binaries and new chemically peculiar B stars (CPs) which had remained unoticed so far. We present here new abundance determinations for HD 67044 which allow us to propose that this star is a new CP late B star. Monier et al. (2015) have recently published the discovery of 4 new HgMn stars (3 from this late-B stars sample and one from a sample of 47 early A types stars verifying the same criteria). Royer et al. (2014) have published the analysis of the sample of 47 early A stars having low apparent projected velocities in the northern hemisphere up to V=6.65 mag. A careful abundance analysis of high resolution high S/N ratio spectra of these objects has sorted out the sample into 17 chemically normal stars, 12 spectroscopic binaries and 13 Chemically Peculiar stars (CPs) among which 5 are new CP stars.
Comment: SF2A 2015 proceeding. 3 pages, 1 figure