Additional Infrared Coronal Lines in the Nova V1405 Cassiopeiae
ATel #15934; Richard J. Rudy (Kookoosint Scientific); John P. Subasavage (Aerospace Corporation); Amanda Bayless (Aerospace Corporation), Ray Russell (Observations Unlimited)
on 7 Mar 2023; 17:54 UT
Credential Certification: Richard Rudy (richard.j.rudy@aero.org)
Subjects: Infra-Red, Optical, Nova
Spectral data from 0.47-2.5 microns of V1405 Cassiopeiae (= Nova Cas 2021) were obtained 2023 February 16.19 (UT), 700 days after outburst, with the Aerospace Corporation's 1.0 m telescope and Visible and Near-Infrared Imaging Spectrograph (VNIRIS). In addition to the infrared coronal line [Si VI] 1.9645 first reported by Woodward, Evans, and Banerjee (ATel #15540) from from 2022 July 31.54, [Ca VIII] 2.3210 and [Ti VI] 1.7151 are now present. The very strong line [Fe VII] 0.6087 reported by Munari and Valisa (ATel #15796) from 2022 November 27 has strengthened further relative to the H I lines and is now 44% of H-alpha. IR magnitudes derived from the spectroscopy are J = 11.0, H = 10.7, Kshort = 10.3
