High-resolution abundance analysis of the metallic-line star HR 7250

Elmash A., Unal K., ÇALIŞKAN TÜRKSOY Ş.

NEW ASTRONOMY, vol.62, pp.15-19, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 62
  • Publication Date: 2018
  • Doi Number: 10.1016/j.newast.2018.01.001
  • Journal Name: NEW ASTRONOMY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.15-19
  • Keywords: Stars, HR 7250, Abundances, Spectroscopic, A-TYPE STARS, EFFECTIVE TEMPERATURE, DATA-BASE, ISOCHRONES, VELOCITIES, CATALOG, TRACKS
  • Ankara University Affiliated: Yes

Abstract

We estimated the stellar parameters and chemical abundances of the highly neglected A-type star HR 7250. The star's high resolution spectrum, spanning a wavelength range from 3900 to 7900 angstrom, was obtained at the TUIBITAK National Observatory. We derived the abundances of 14 elements (O, Na, Mg, Si, S, Ca, Sc, Ti, Cr, Fe, Ni, Sr, Y, and Ba) for HR 7250 from the unblended lines of the star's spectrum. Our analysis shows that HR 7250 is a chemically peculiar Am star. We also estimated its age and mass as 400 +/- 70 Myr and 3.25 +/- 0.17 M-circle dot from evolutionary tracks and isochrones.