The Solar Neighborhood LV: Spectral Characterization of an Equatorial Sample of 580 K Dwarfs
| Title: | The Solar Neighborhood LV: Spectral Characterization of an Equatorial Sample of 580 K Dwarfs |
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| Authors: | Hodari-Sadiki Hubbard-James; Sebastian Carrazco-Gaxiola; Todd J. Henry; Leonardo A. Paredes; Azmain H. Nizak; Xavier Lesley-Saldaña; Wei-Chun Jao; Abigail Arbogast |
| Source: | The Astronomical Journal, Vol 171, Iss 3, p 175 (2026) |
| Publisher Information: | IOP Publishing |
| Publication Year: | 2026 |
| Collection: | Directory of Open Access Journals: DOAJ Articles |
| Subject Terms: | Late-type stars; Solar neighborhood; Spectroscopy; Solar nebulae; Stellar ages; Astronomy; QB1-991 |
| Description: | We present a spectroscopic characterization of 580 K dwarfs within 33 pc, observed with the CHIRON echelle spectrograph ( R = 80,000) on the SMARTS 1.5 m telescope. This volume-limited sample is part of the RKSTAR survey of ∼4400 K dwarf primaries within 50 pc. Using Empirical SpecMatch and the diagnostic lines H α (6562.8 Å) and Li I (6707.8 Å), we derive stellar properties, activity status, and age indicators calibrated against 35 benchmark K dwarfs with ages from 20 Myr to 5 Gyr. We find that 7.4% (43 stars) exhibit signatures of youth and/or chromospheric activity: 19 stars show lithium absorption indicating ages |
| Document Type: | article in journal/newspaper |
| Language: | English |
| Relation: | https://doi.org/10.3847/1538-3881/ae3de3; https://doaj.org/toc/1538-3881; https://doaj.org/article/a68caba891c041c5890262385cecfbac |
| DOI: | 10.3847/1538-3881/ae3de3 |
| Availability: | https://doi.org/10.3847/1538-3881/ae3de3; https://doaj.org/article/a68caba891c041c5890262385cecfbac |
| Accession Number: | edsbas.ADE5AC53 |
| Database: | BASE |