Scarlet Spectra: Two Red L Dwarfs Revealed by SOAR
Abstract
We present the analysis of two unusually red L dwarfs, CWISE J075554.14-325956.3 (W0755-3259) and CWISE J165909.91-351108.5 (W1659-3511), confirmed by their newly obtained near-infrared spectra collected with the TripleSpec4 spectrograph on the Southern Astrophysical Research Telescope. We classify W0755-3259 as an L7 very low-gravity dwarf, exhibiting extreme redness with a characteristic peaked H-band and spectral indices typical of low-gravity late-type L dwarfs. We classify W1659-3511 as a red L7 field-gravity dwarf, with a more rounded H-band peak and spectral indices that support a normal gravity designation. W1659-3511 is noticeably fainter than W0755-3259, and the rounded H-band of W1659-3511 may be evidence of CH4 absorption.
- Publication:
-
Research Notes of the American Astronomical Society
- Pub Date:
- July 2023
- DOI:
- 10.3847/2515-5172/ace448
- Bibcode:
- 2023RNAAS...7..144R
- Keywords:
-
- L dwarfs;
- Brown dwarfs;
- Spectroscopy;
- Near infrared astronomy;
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- 185;
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