Spectroscopic study of Herbig Ae/Be stars in the Galactic anti-centre region from LAMOST DR5
- Title
- Spectroscopic study of Herbig Ae/Be stars in the Galactic anti-centre region from LAMOST DR5
- Creator
- Nidhi S.; Mathew B.; Shridharan B.; Arun R.; Anusha R.; Kartha S.S.
- Description
- We study a sample of 119 Herbig Ae/Be stars in the Galactic anti-centre direction using the spectroscopic data from large sky area multi-object fiber spectroscopic telescope survey program. Emission lines of hydrogen belonging to the Balmer and Paschen series, and metallic lines of species such as Fe ii, O i, Ca ii triplet are identified. A moderate correlation is observed between the emission strengths of H? and Fe ii 5169 suggesting a possible common emission region for Fe ii lines and one of the components of H?. We explored a technique for the extinction correction of the HAeBe stars using diffuse interstellar bands present in the spectrum. We estimated the stellar parameters such as age and mass of these HAeBe stars, which are found to be in the range 0.1-10 Myr and 1.5-10 M, respectively. We found that the mass accretion rate of the HAeBe stars in the Galactic anti-centre direction follows the relation ?acc ? M?3.12-0.34+0.21, which is similar to the relation derived for HAeBe stars in other regions of the Galaxy. The mass accretion rate of HAeBe stars is found to have a functional form of ?acc ? t-1.10.02 with age, in agreement with previous studies. 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
- Source
- Monthly Notices of the Royal Astronomical Society, Vol-524, No. 4, pp. 5166-5181.
- Date
- 2023-01-01
- Publisher
- Oxford University Press
- Subject
- accretion; stars: emission-line; techniques: photometric; techniques: spectroscopic
- Coverage
- Nidhi S., Department of Physics and Electronics, Christ (Deemed to Be University), Bangalore, 560029, India; Mathew B., Department of Physics and Electronics, Christ (Deemed to Be University), Bangalore, 560029, India; Shridharan B., Department of Physics and Electronics, Christ (Deemed to Be University), Bangalore, 560029, India; Arun R., Indian Institute of Astrophysics (IIA), Sarjapur Road, Koramangala, Bangalore, 560034, India; Anusha R., Department of Physics & Astronomy, University of Western Ontario, London, N6A 5B7, ON, Canada; Kartha S.S., Department of Physics and Electronics, Christ (Deemed to Be University), Bangalore, 560029, India
- Rights
- All Open Access; Green Open Access
- Relation
- ISSN: 358711; CODEN: MNRAA
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Nidhi S.; Mathew B.; Shridharan B.; Arun R.; Anusha R.; Kartha S.S., “Spectroscopic study of Herbig Ae/Be stars in the Galactic anti-centre region from LAMOST DR5,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/14030.