Optical and Infrared Spectral Features of Nova Canis Majoris 2018
ATel #11565; Richard Rudy , Jon Mauerhan, Kirk Crawford, Ray Russell, Sloane Wiktorowicz (Aerospace Corporation)
on 23 Apr 2018; 22:22 UT
Credential Certification: Richard Rudy (richard.j.rudy@aero.org)
Subjects: Infra-Red, Optical, Nova
Optical and IR spectra from 0.47-2.5 microns (resolution: 5-30 angstroms) of Nova Canis Majoris (CBET 4499), were obtained 2018 April 21.14 (UT) with the Aerospace Corporation's 1.0 m telescope using its Visible and Infrared Imaging Spectrograph (VNIRIS). Although weak, Fe II lines are present confirming the classification of Nova CMa 2018 by Strader et al. (CBET 4499) as an Fe II nova. Other low excitation features include C I, N I, O I, Na I, and Ca II. The forbidden lines of [O I] lines at 0.6300, 0.6363 microns are detected as well as the [N I] line at 1.040 microns. In addition to the stronger H I lines, P-Cygni profiles are seen on the C I and O I lines as well. The first overtone of carbon monoxide is strongly in emission indicating that dust formation could soon take place.
