Near-IR Spectroscopy of ASASSN-18fv
ATel #11506; M. Rabus (PUC/MPIA), J. L. Prieto (UDP/MAS)
on 6 Apr 2018; 00:39 UT
Credential Certification: Jose L. Prieto (jose.prietok@mail.udp.cl)
Subjects: Infra-Red, Nova, Transient
Referred to by ATel #: 11677
We obtained a near-infrared spectrum (range 0.8-1.7 micron, R~3500) of the bright Galactic transient ASASSN-18fv (ATel #11454, #11456, #11460, #11467, #11468, #11504) on UT 2018 April 1.23 with the ARCoIRIS spectrograph mounted on the Blanco 4m telescope at Cerro Tololo in Chile. The spectrum shows a rich set of emission lines over a relatively flat continuum. We identify lines from H I, He I, Ca II, N I, O I, C I transitions with FWHM velocities of a few x 100 km/s to ~2000 km/s. The spectrum does not show any strong absorption lines or P-Cygni profiles, showing significant evolution from the optical spectra obtained ~10 days earlier (ATel #11456, #11460, #11468). The spectrum of ASASSN-18fv is consistent with the observed near-IR spectra of normal Fe II and transition (Fe II + He/N) class novae after peak (e.g., Srivastava et al. 2016, MNRAS, 462, 2074), and significantly different from the near-IR spectra of V838 Mon (Rushton et al. 2005, MNRAS, 360, 1281) and Sakurai's object (e.g., Eyres et al. 1998, MNRAS, 298, 37; Tyne et al. 2000, MNRAS, 315, 595). A figure with the near-IR spectrum can be found here.
