Young stars in the Camelopardalis dust and molecular clouds. V. More YSOs confirmed spectroscopically

TL;DR

This study spectroscopically confirms the young stellar object status of multiple stars in the Camelopardalis and Perseus clouds, revealing their spectral types, emission features, and evolutionary stages using infrared and optical data.

Contribution

It provides new spectroscopic confirmation of YSOs in specific star-forming regions, detailing their spectral characteristics and evolutionary stages.

Findings

Confirmed 22 YSOs spectroscopically

Most YSOs are Herbig Ae or intermediate T Tauri stars

Stars are located at about 900 pc in the Local arm

Abstract

Far red spectra for 22 stars in the Camelopardalis and the northern Perseus dark clouds, suspected to be pre-main-sequence objects (YSOs), are obtained. This evolutionary status is confirmed for ten stars located in the dust and molecular cloud close to the high-mass protostar GL 490, four stars near the H II region Sh2-205 and one star in the dark cloud TGU 1041. All of these objects exhibit emission in the H alpha line and some of them emission in the O I and Ca II lines. The spectral energy distributions, equivalent widths of the emission lines and approximate spectral classes are determined. Evolutionary stages of the stars are estimated from 2MASS, IRAS and MSX infrared photometry. Now we have spectral confirmation of the YSO status for 14 stars in the GL 490 area and 8 stars at Sh2-205. Their spectral types are from A to K, but most of them are either Herbig Ae stars or intermediate objects between T Tauri type and Herbig stars. Both these star forming regions are located near the outer edge of the Local arm at a distance of 900 pc.