ItemArticle

Discovery of 2716 hot emission-line stars from LAMOST DR5

Title
Discovery of 2716 hot emission-line stars from LAMOST DR5
Creator
Shridharan B.; Mathew B.; Nidhi S.; Anusha R.; Arun R.; Kartha S.S.; Kumar Y.B.
Description
We present a catalog of 3339 hot emission-line stars (ELSs) identified from 451 695 O, B and A type spectra, provided by LAMOST Data Release 5 (DR5). We developed an automated Python routine that identified 5437 spectra having a peak between 6561 and 6568 False detections and bad spectra were removed, leaving 4138 good emission-line spectra of 3339 unique ELSs. We re-estimated the spectral types of 3307 spectra as the LAMOST Stellar Parameter Pipeline (LASP) did not provide accurate spectral types for these emission-line spectra. As Herbig Ae/Be stars exhibit higher excess in near-infrared and mid-infrared wavelengths than classical Ae/Be stars, we relied on 2MASS and WISE photometry to distinguish them. Finally, we report 1089 classical Be, 233 classical Ae and 56 Herbig Ae/Be stars identified from LAMOST DR5. In addition, 928 B[em]/A[em] stars and 240 CAe/CBe potential candidates are identified. From our sample of 3339 hot ELSs, 2716 ELSs identified in this work do not have any record in the SIMBAD database and they can be considered as new detections. Identification of such a large homogeneous set of emission-line spectra will help the community study the emission phenomenon in detail without worrying about the inherent biases when compiling from various sources. 2021 National Astronomical Observatories, CAS and IOP Publishing Ltd..
Source
Research in Astronomy and Astrophysics, Vol-21, No. 11
Date
2021-01-01
Publisher
IOP Publishing Ltd
Coverage
Shridharan B., 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; Nidhi S., Department of Physics and Electronics, CHRIST (Deemed to Be University), Bangalore, 560029, India; Anusha R., Department of Physics and Electronics, CHRIST (Deemed to Be University), Bangalore, 560029, India; Arun R., Department of Physics and Electronics, CHRIST (Deemed to Be University), Bangalore, 560029, India; Kartha S.S., Department of Physics and Electronics, CHRIST (Deemed to Be University), Bangalore, 560029, India; Kumar Y.B., Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, China
Rights
All Open Access; Green Open Access
Relation
ISSN: 16744527
Format
Online
Language
English
Type
Article

Collection

Articles

Citation

Shridharan B.; Mathew B.; Nidhi S.; Anusha R.; Arun R.; Kartha S.S.; Kumar Y.B., “Discovery of 2716 hot emission-line stars from LAMOST DR5,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 26, 2025, https://archives.christuniversity.in/items/show/15621.

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