J/ApJ/908/232 SN 2020bvc optical and near-IR spectra (Rho+, 2021)
Near-infrared and optical observations of Type Ic SN 2020oi and broad-lined
Type Ic SN 2020bvc: carbon monoxide, dust, and high-velocity supernova ejecta.
Rho J., Evans A., Geballe T.R., Banerjee D.P.K., Hoeflich P.,
Shahbandeh M., Valenti S., Yoon S.-C., Jin H., Williamson M., Modjaz M.,
Hiramatsu D., Howell D.A., Pellegrino C., Vinko J., Cartier R., Burke J.,
Mccully C., An H., Cha H., Pritchard T., Wang X., Andrews J., Galbany L.,
Van Dyk S., Graham M.L., Blinnikov S., Joshi V., Pal A., Kriskovics L.,
Ordasi A., Szakats R., Vida K., Chen Z., Li X., Zhang J., Yan S.
<Astrophys. J., 908, 232-232 (2021)>
=2021ApJ...908..232R 2021ApJ...908..232R (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Optical ; Infrared
Keywords: Core-collapse supernovae - Type Ic supernovae - Carbonaceous grains -
Cosmochemistry - Interstellar molecules - Molecular spectroscopy -
High resolution spectroscopy - Line intensities - Silicate grains -
Interstellar dust - Explosive nucleosynthesis - Nucleosynthesis
Abstract:
We present near-IR (NIR) and optical observations of the Type Ic
supernova (SN Ic) SN 2020oi in the galaxy M100 and the broad-lined SN
Ic SN 2020bvc in UGC 9379, using Gemini, Las Cumbres Observatory,
Southern Astrophysical Telescope, and other ground-based telescopes.
The NIR spectrum of SN 2020oi at day 63 since the explosion shows
strong CO emissions and a rising K-band continuum, which is the first
unambiguous dust detection from an SN Ic. Non-LTE CO modeling shows
that CO is still optically thick and that the lower limit to the CO
mass is 10-3M☉. The dust temperature is 810 K, and the dust
mass is ∼10-5M☉. We explore the possibilities that the dust is
freshly formed in the ejecta, heated dust in the preexisting
circumstellar medium, and an infrared echo. The light curves of SN
2020oi are consistent with a STELLA model with canonical explosion
energy, 0.07M☉ Ni mass, and 0.7M☉ ejecta mass. A model of
high explosion energy of 1052erg, 0.4M☉ Ni mass, and
6.5M☉ ejecta mass with the circumstellar matter reproduces the
double-peaked light curves of SN 2020bvc. We observe temporal changes
of absorption features of the IR CaII triplet, SI at 1.043µm, and
FeII at 5169Å. The blueshifted lines indicate high velocities, up
to 60000km/s for SN 2020bvc and 20000km/s for SN 2020oi, and the
expansion velocity rapidly declines before the optical maximum. We
present modeled spectral signatures and diagnostics of CO and SiO
molecular bands between 1.4 and 10µm.
Description:
Optical and near-IR Spectral data of SN2020oi.
Objects:
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RA (2000) DE Designation(s)
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12 22 54.93 +15 49 25.0 SN 2020oi = ZTF20aaelulu
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 61 25 List of SN 2020oi spectra
sp1/* . 7 Individual spectra
sp2/* . 11 Individual spectra
sp3/* . 5 Individual spectra
sp4/* . 1 Individual spectrum
sp5/* . 1 Individual spectrum
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 45 A45 --- FileName Name of the light curve file
47- 61 A15 --- Inst Instrument
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Byte-by-byte Description of file: sp1/*
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Bytes Format Units Label Explanations
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1- 19 F19.13 0.1nm lambda Wavelengths in Angstrom
21- 43 E23.17 W/m2/um Flux Flux
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Byte-by-byte Description of file: sp2/*
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Bytes Format Units Label Explanations
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1- 19 F19.13 0.1nm lambda Wavelengths in Angstrom
22- 45 E24.17 10mW/m2/nm Flux Flux (erg/cm2/s/Å)
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Byte-by-byte Description of file: sp3/*
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Bytes Format Units Label Explanations
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1- 9 F9.7 um lambda Wavelengths in micrometer
12- 28 E17.11 W/m2/um Flux Flux
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Byte-by-byte Description of file: sp4/*
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Bytes Format Units Label Explanations
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1- 10 F10.8 um lambda Wavelengths in micrometer
12- 26 E15.8 10mW/m2/nm Flux Flux (erg/cm2/s/Å)
28- 40 E13.8 10mW/m2/nm e_Flux Flux Error
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Byte-by-byte Description of file: sp5/*
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Bytes Format Units Label Explanations
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1- 8 F8.2 um lambda Wavelengths in micrometer
10- 20 E11.6 W/m2/um Flux Fluxes in SI Units
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Acknowledgements:
Aravind Pazhayathravi, aravind.pazhayathravi(at)mavs.uta.edu
(End) Patricia Vannier [CDS] 10-Nov-2021