New Bright Carbon Stars Found In The DFBS. (Research note, submitted to Astrophysics)

TL;DR

This paper reports the discovery of two new faint high latitude carbon stars of Population II, providing valuable data for understanding early Galactic evolution and chemical enrichment.

Contribution

It introduces two newly identified CH type stars from the DFBS, confirmed by spectra, and estimates their distances and magnitudes, expanding the known population.

Findings

Discovered two new CH type stars in the DFBS.

Confirmed carbon-rich nature through medium resolution spectra.

Estimated distances and K band magnitudes for the new stars.

Abstract

Carbon rich stars of Population II, such as CH giants, can provide direct information on the role of low to intermediate mass stars of the Halo in early Galactic evolution. Moreover, accurate knowledge of the CH stellar population is a critical requirement for building up scenarios for early Galactic chemical evolution. The first list of the faint high latitude C stars (FHLCs), found in the Digitized First Byurakan Survey {http://byurakan.phys.uniroma1.it and http://www.aras.am/Dfbs/dfbs.html} (DFBS) is given in a paper recently submitted for publication in Astronomy ad Astrophysics. In the present work, we report the recent discovery of two additional CH type stars (not previously catalogued), namely DFBS J075331.98+190344.3 and DFBS J111422.94+091442.7, detected on the DFBS plates with help of the image analysis softwares (FITSView and SAOImage DS9). Medium resolution spectra confirm the C rich nature for both of them. Using infrared color magnitudes relationship, we estimated the distances and K band absolute magnitudes of the new objects.