Hα emission line sources from VLT-MUSE in a low-metallicity star forming region-Dolidze 25

被引：0

作者：

Ashraf, Mizna ^{[1
]}

Jose, Jessy ^{[1
]}

Herczeg, Gregory ^{[2
]}

Fang, Min ^{[3
]}

机构：

[1] Indian Inst Sci Educ & Res Tirupati, Tirupati 517619, India

[2] Kavli Inst Astron & Astrophys, Beijing, Peoples R China

[3] Purple Mt Observ, Nanjing, Peoples R China

来源：

JOURNAL OF ASTROPHYSICS AND ASTRONOMY | 2023年 / 44卷 / 02期

关键词：

Accretion; accretion disks stars: pre-main sequence; protoplanetary disks: metallicity; MASS ACCRETION RATES; YOUNG CLUSTERS; PHOTOMETRIC-DETERMINATION; DISK ACCRETION; EVOLUTION;

D O I：

10.1007/s12036-023-09951-x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The process of accretion through circumstellar disks in young stellar objects is an integral part of star formation and the Ha emission line is a prominent signature of accretion in low-mass stars. We present the detection and characterization of Ha emission line sources in the central region of a distant, low-metallicity young stellar cluster Dolidze 25 (at similar to 4.5 kpc) using medium-resolution optical spectra (4750-9350 angstrom) obtained with the multi-unit spectroscopic explorer (MUSE) at the VLT. We have identified 14 potential accreting sources within a rectangular region of (2' x 1') towards the center of the cluster based on the detection of strong and broad emissions in Ha as well as the presence of other emission lines, such as [OI] and H beta. Based on their positions in both photometric color-magnitude and color-color diagrams, we have also confirmed that these objects belong to the pre-main sequence phase of star formation. Our results were compared with the disk and diskless members of the cluster previously identified by Guarcello et al. (2021) using near-IR colors, and all sources they had identified as disks were confirmed to be accreting based on the spectroscopic characteristics.

引用

页数：8