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Spectral modeling of type II supernovae. I. Dilution factors
C. Vogl, S. A. Sim, U. M. Noebauer +2
We present substantial extensions to the Monte Carlo radiative transfer code TARDIS to perform spectral synthesis for type II supernovae. By incorporating a non-LTE ionization and…
Limits on stable iron in TypeIa supernovae from NIR spectroscopy
A. Flörs, J. Spyromilio, K. Maguire +3
We obtained optical and near-infrared spectra of TypeIa supernovae (SNeIa) at epochs ranging from 224 to 496 days after the explosion. The spectra show emission lines from…
Type Iax SNe as a few-parameter family
Barnabas Barna, Tamas Szalai, Wolfgang E. Kerzendorf +4
We present direct spectroscopic modeling of five Type Iax supernovae (SNe) with the one dimensional Monte Carlo radiative transfer code TARDIS. The abundance tomography technique i…
Nebular spectroscopy of SN 2014J: Detection of stable nickel in near infrared spectra
S. Dhawan, A. Flörs, B. Leibundgut +5
We present near infrared (NIR) spectroscopy of the nearby supernova 2014J obtained 450 d after explosion. We detect the [Ni II] 1.939 m line in the spectra indicating the…
Three Hypervelocity White Dwarfs in Gaia DR2: Evidence for Dynamically Driven Double-Degenerate Double-Detonation Type Ia Supernovae
Ken J. Shen, Douglas Boubert, Boris T. Gänsicke +23
Double detonations in double white dwarf (WD) binaries undergoing unstable mass transfer have emerged in recent years as one of the most promising Type Ia supernova (SN Ia) progeni…
Super-Solar Metallicity Stars in the Galactic Center Nuclear Star Cluster: Unusual Sc, V, and Y Abundances
Tuan Do, Wolfgang Kerzendorf, Quinn Konopacky +4
We present adaptive-optics assisted near-infrared high-spectral resolution observations of late-type giants in the nuclear star cluster of the Milky Way. The metallicity and elemen…