Journal ArticleSpectroscopic Confirmation of the Nearby, Wide-separation L Dwarf Pair CWISE J061741.79+194512.8ABHumphreys, Austin; Meisner, Aaron M; Burgasser, Adam J; Hsu, Chih-Chun; Schneider, Adam C; Theissen, Christopher A; Aganze, Christian; Gerasimov, Roman; Schapera, Noah; Kirkpatrick, J Davy; Marocco, Federico; Faherty, Jacqueline K; Caselden, Dan; Kuchner, Marc J; Cushing, Michael CThe_Backyard_Worlds_Planet_9_Collaboration; The_Backyard_Worlds_Cool_Neighbors_Collaboration<title>Abstract</title> <p>We present spectroscopic confirmation of a nearby L dwarf pair, CWISE J061741.79+194512.8AB. Keck/NIRES near-infrared spectroscopy shows that the pair is composed of an L2 dwarf primary and an L4 dwarf secondary. High resolution spectroscopy of the combined light system with Keck/NIRSPEC yields a radial velocity of 29.2 ± 0.3 km s⁻¹and a projected rotational velocity<inline-formula><tex-math><CDATA/></tex-math><math overflow='scroll'><mi>v</mi><mi>sin</mi><mi>i</mi><mspace width='0.50em'/></math><inline-graphic href='rnaasacf4a0ieqn1.gif' type='simple'/></inline-formula>=<inline-formula><tex-math><CDATA/></tex-math><math overflow='scroll'><mspace width='0.50em'/><msubsup><mrow><mn>41.6</mn></mrow><mrow><mo>−</mo><mn>2.6</mn></mrow><mrow><mo>+</mo><mn>2.7</mn></mrow></msubsup></math><inline-graphic href='rnaasacf4a0ieqn2.gif' type='simple'/></inline-formula>km s⁻¹. Our spectrophotometric distance estimate places the system at 28.2 ± 5.7 pc, significantly more distant than originally estimated in Kirkpatrick et al. The angular separation of the components is 1.″31 ± 0.″14, corresponding to a projected physical separation of 37 ± 8 au.</p>IOP2023-08-3110533776Research Notes of the AAS781842515-5172https://doi.org/10.3847/2515-5172/acf4a02009136National Science Foundation