J/A+A/655/A105 3 SN multiwavelength light curves (Sollerman+, 2021)
The Type II supernova SN 2020jfo in M61, implications for progenitor system and
explosion dynamics.
Sollerman J., Yang S., Schulze S., Strotjohann N.L., Jerkstrand A.,
Van Dyk S.D., Kool E.C., Barbarino C., Brink T.G., Bruch R., De K.,
Filippenko A.V., Fremling C., Patra K.C., Perley D., Yan L., Yang Y.,
Andreoni I., Campbell R., Coughlin M., Kasliwal M., Kim Y.-L., Rigault M.,
Shin K., Tzanidakis A., Ashley M.C.B., Moore A.M., Travouillon T.
<Astron. Astrophys. 655, A105 (2021)>
=2021A&A...655A.105S 2021A&A...655A.105S (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry
Keywords: supernovae: general
Abstract:
We present the discovery and extensive follow-up observations of SN
2020jfo, a Type IIP supernova (SN) in the nearby (14.5Mpc) galaxy
M61. Optical light curves (LCs) and spectra from the Zwicky Transient
Facility (ZTF), complemented with data from Swift/UVOT and
near-infrared photometry is presented. These are used to model the
350-day duration bolometric light curve, which exhibits a relatively
short (∼65 days) plateau. This implies a moderate ejecta mass
(∼5M☉) at the time of explosion, whereas the deduced amount of
ejected radioactive nickel is ∼0.025M☉. An extensive series of
spectroscopy is presented, including spectropolarimetric observations.
The nebular spectra are dominated by Hα but also reveal emission
lines from oxygen and calcium. Comparisons to synthetic nebular
spectra indicate an initial progenitor mass of ∼12M☉. We also
note the presence of stable nickel in the nebular spectrum, and SN
2020jfo joins a small group of SNe that have inferred super-solar
Ni/Fe ratios. Several years of pre-discovery data are examined, but no
signs of pre-cursor activity is found. Pre-explosion Hubble Space
Telescope imaging reveals a probable progenitor star, detected only in
the reddest band (MF814W~-5.8) and is fainter than expected for
stars in the 10-15M☉ range. There is thus some tension between
the LC analysis, the nebular spectral modeling and the pre-explosion
imaging. To compare and contrast, we present two additional
core-collapse SNe monitored by the ZTF, which also have nebular
Hα-dominated spectra. This illustrates how the absence or
presence of interaction with circumstellar material (CSM) affect both
the LCs and in particular the nebular spectra. Type II SN 2020amv has
a LC powered by CSM interaction, in particular after ∼40-days when the
LC is bumpy and slowly evolving. The late-time spectra show strong
Hα emission with a structure suggesting emission from a thin,
dense shell. The evolution of the complex three-horn line profile is
reminiscent of that observed for SN 1998S. Finally, SN 2020jfv has a
poorly constrained early-time LC, but is of interest because of the
transition from a hydrogen-poor Type IIb to a Type IIn, where the
nebular spectrum after the light-curve rebrightening is dominated by
Hα, although with an intermediate line width.
Description:
Photometric data for SN 2020jfo, 2020amv and 2020jfv. ZTF g r is
forced photometry, while ZTF i band is alert data. ATLAS is forced
photometry from https://fallingstar-data.com/forcedphot/. P60, LT,
Swift and NOT data are reduced as detailed in the paper
(arXiv:2107.14503).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sn.dat 47 3 List of studied SN
2020amv.dat 53 440 Photometry of 2020amv
2020jfo.dat 53 487 Photometry of 2020jfo
2020jfv.dat 53 256 Photometry of 2020jfv
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See also:
http://www.wiserep.org/object/14633 : 2020jfo bolometric lightcurve and
spectra on WISeREP
http://www.wiserep.org/object/14949 : 2020jfv bolometric lightcurve and
spectra on WISeREP
http://www.wiserep.org/object/14058 : 2020amv bolometric lightcurve and
spectra on WISeREP
Byte-by-byte Description of file: sn.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name SN name
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 22 F5.2 s RAs Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 34 F4.1 arcsec DEs Declination (J2000)
36- 47 A12 --- OName ZTF name
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Byte-by-byte Description of file: 2020amv.dat 2020jfo.dat 2020jfv.dat
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Bytes Format Units Label Explanations
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1- 10 F10.2 d JD Julian Date
12- 17 F6.1 d Phase Rest Frame Phase
19- 22 A4 --- Filter Filter name
24- 29 F6.2 mag MAG ?=99 Absolute Magnitude
31- 35 F5.2 mag mag ?=99 Apparent magnitude
37- 41 F5.2 mag maglim ?=99 Limiting magnitude
43- 47 F5.2 mag e_mag ?=99 Error of magnitude (1)
49- 53 A5 --- Inst Instrument name
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Note (1): Measurements with magnitude error of 99 stands for upper limits
(3 sigma)
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Acknowledgements:
Sheng Yang, sheng.yang(at)astro.su.se
(End) Patricia Vannier [CDS] 13-Sep-2021