J/ApJ/930/34 HCT spectroscopic obs. of the type IIP SN 2020jfo (Teja+, 2022)
SN 2020jfo: a short-plateau type II supernova from a low-mass progenitor.
Teja R.S., Singh A., Sahu D.K., Anupama G.C., Kumar B., N. A J
<Astrophys. J., 930, 34 (2022)>
=2022ApJ...930...34T 2022ApJ...930...34T
ADC_Keywords: Supernovae; Spectra, optical
Keywords: Core-collapse supernovae ; Type II supernovae ; Supernova dynamics ;
Observational astronomy ; Red supergiant stars ; Supernovae ; Ejecta
Abstract:
We present spectroscopic and photometric observations of the Type IIP
supernova, SN2020jfo, in ultraviolet and optical wavelengths.
SN2020jfo occurred in the spiral galaxy M61 (NGC 4303), with eight
observed supernovae in the past 100yr. SN 2020jfo exhibited a short
plateau lasting <65days, and achieved a maximum brightness in Vband of
MV=-17.4±0.4mag at about 8.0±0.5days since explosion. From the
bolometric light curve, we have estimated the mass of 56Ni
synthesized in the explosion to be 0.033±0.006M☉. The observed
spectral features are typical for a Type IIP supernova except for
shallow Hα absorption throughout the evolution and the presence
of stable 58Ni feature at 7378Å, in the nebular phase. Using
hydrodynamical modeling in the MESA+STELLA framework, an ejecta mass
of ∼5M☉ is estimated. Models also indicate SN2020jfo could be
the result of a red supergiant progenitor with MZAMS ∼12M☉.
Bolometric light-curve modeling revealed the presence of a secondary
radiation source for initial ∼20days, which has been attributed to
interaction with a circumstellar material of mass ∼0.2M☉, which
most likely was ejected due to enhanced mass loss about 20yr prior to
the supernova explosion.
Description:
A quick follow-up of SN 2020jfo began on 2020 May 07 (JD2458977.2),
i.e., ∼2days after discovery, with the Himalayan Faint Object
Spectrograph Camera (HFOSC) mounted on the 2-m Himalayan Chandra
Telescope (HCT), situated at the Indian Astronomical Observatory
(IAO), Hanle, India. See Section 2.1.
The Neil Gehrels Swift Observatory database indicated that SN2020jfo
was observed with the Ultra Violet Optical Telescope (UVOT) on board
Neil Gehrels Swift Observatory in the UVW2, UVM2, UVW1, UVU, UVB, and
UVV bands starting from 2020 May 07 (JD 2458976.6) and continued until
2020 August 08 (JD 2459069.6). See Section 2.2.
Spectroscopic observations of SN 2020jfo were primarily carried out
with the HCT starting from 2020-May-07 (JD2458977.1) to 2021-Jan-26
(JD 2459241.4), using HFOSC with grisms Gr7 and Gr8. One spectrum at
the nebular phase was obtained on 2021 February 21 (JD 2459266.5) with
the ADFOSC instrument mounted at the 3.6m Devasthal Optical Telescope
(DOT). See Section 2.3.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
12 21 50.47 +04 28 54.0 SN 2020jfo = ZTF20aaynrrh
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 55 18 List of spectra in subdirectory "sp"
sp/* . 18 Individual spectra in ASCII format
(Data behind Figure 7)
--------------------------------------------------------------------------------
See also:
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
J/A+A/333/231 : O-M stars model atmospheres (Bessell+ 1998)
J/AJ/130/873 : BQS objects in the SDSS DR3 area (Jester+, 2005)
J/MNRAS/372/1315 : UBVRI photometry of SN 2004et (Sahu+, 2006)
J/AJ/137/4517 : UVOT light curves of supernovae (Brown+, 2009)
J/MNRAS/408/827 : Simulations of supernova explosions (Dessart+, 2010)
J/MNRAS/438/L101 : First month on SN 2013ej (Valenti+, 2014)
J/ApJ/799/208 : Type IIP supernovae from Pan-STARRS1 (Sanders+, 2015)
J/MNRAS/448/2608 : UV and optical phot. data for SN 2013by (Valenti+, 2015)
J/MNRAS/459/3939 : Type II supernova light curves (Valenti+, 2016)
J/ApJ/885/43 : UBVRI & ugriz phot. of supernova SN 2017gmr (Andrews+, 2019)
J/ApJ/875/136 : BVRI, sp. & IR obs. of type II-P SN2017eaw (Van Dyk+, 2019)
J/AJ/160/199 : Estimated distances for galaxies with NED-D (Steer, 2020)
J/ApJ/912/46 : ZTF Type II supernovae with follow-up obs. (Bruch+, 2021)
J/A+A/655/A105 : 3 SN multiwavelength light curves (Sollerman+, 2021)
J/ApJ/924/15 : Final moments. I. Type II SN 2020tlf (Jacobson-Galan+, 2022)
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 35 A35 --- File Name of the file in subdirectory "sp"
37- 42 F6.1 d JD [8977.1/9266.5] Julian date; JD-2450000
44- 47 I4 d Phase [3/292] Phase relative to the explosion
epoch of JD2458974.0
49- 55 A7 --- Grism Grism identifier(s)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: sp/*
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.4 0.1nm lambda [3984/9000] Redshift-corrected wavelength;
Angstroms
11- 21 E11.4 cW/m2/nm Flux [-6.5e-17/1.3e-14] Calibrated flux;
erg/s/cm2/Å
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 15-Mar-2024