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2023RNAAS...7..144R - Research Notes of the AAS, 7, 144 (2023/July-0)

Scarlet Spectra: Two Red L Dwarfs Revealed by SOAR.

ROBBINS G., MEISNER A.M., SCHNEIDER A.C., KIRKPATRICK J.D., CASELDEN D., BURGASSER A.J., FAHERTY J.K., KUCHNER M.J., MAROCCO F., GAGNE J., CASEWELL S. (The Backyard Worlds: Planet 9 Collaboration) (The Backyard Worlds: Cool Neighbors Collaboration)

Abstract (from CDS):

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.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): L dwarfs - Brown dwarfs - Spectroscopy - Near infrared astronomy

Simbad objects: 6

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