Nova Del 2013: Near-infrared spectroscopy
ATel #5337; D. P. K. Banerjee , N. M. Ashok & Vishal Joshi (1) and Nye Evans (2); (1) - Physical Research Laboratory, Ahmedabad, India ; (2) Astrophysics Group, Keele University, U. K.
on 29 Aug 2013; 11:03 UT
Credential Certification: Dipankar P.K. Banerjee (orion@prl.res.in)
Subjects: Cataclysmic Variable, Nova
We report 1.09 to 2.35 micron near-infrared spectroscopy of
Nova Del 2013 in the J,H,K bands obtained with the Mount Abu 1.2 meter
telescope (+ PRL Near-Infrared NICMOS3 Imager/Spectrograph) on August 28.674 UT.
The spectra were obtained at a resolution of ~ 1000 in non-photometric sky
conditions. The spectra are dominated by emission lines, most prominent among these
being H I Paschen-beta and Paschen-gamma, Brackett-gamma, Brackett 10 to 20
lines in the H band and O I lines at 1.1287 and 1.3164 microns (also see ATel #5336). In addition,
several strong lines of carbon are present, especially in the J and H
bands. Such C I lines are hallmarks of the near-IR spectra of the Fe II
class of novae, templates of which are given in Banerjee & Ashok
( BASI, 2012, 40, 243). No molecular first overtone CO emission is seen
in the K band at 2.29 micron and beyond. The measured FWHM of the
Paschen beta line at 1.2818 micron is 1700 km/s.
