Work

Kast Optical Spectra of Unclassified Stars Within 20 pc of the Sun

Year: 2025

Type: article

Abstract: M- and L-type dwarfs are abundant in the Milky Way, yet many of these nearest sources remain poorly characterized. We present optical spectra for 67 low-luminosity sources within 20 pc of the Sun, 41 of which are optically classified for the first time. We determine spectral classifications spanning M3–L3, and report indicators of metallicity and magnetic activity. We identify two sources with discrepant classifications in the literature, and report a likely binary system LP 546-37.

Source: Research Notes of the AAS

DOI: 10.3847/2515-5172/addac5

Authors: Marylin Loritsch, Adam Burgasser, Madison Fierro, Emma Softich, Christopher Theissen, Preethi Karpoor, Chih-Chun Hsu, Roman Gerasimov

Institutions: University of California San Diego, Northwestern University, University of Notre Dame

Language: English

Topic: Stellar, planetary, and galactic studies

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

OpenAlex ID: W4410616696

FWCI:

Cites: 35

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Related to: 10