J/A+A/555/A142 Spectra of 5 Type II supernovae (Inserra+, 2013)
Moderately luminous Type II supernovae.
Inserra C., Pastorello A., Turatto M., Pumo M.L., Benetti S., Cappellaro E.,
Botticella M.T., Bufano F., Elias-Rosa N., Harutyunyan A., Taubenberger S.,
Valenti S., Zampieri L.
<Astron. Astrophys. 555, A142 (2013)>
=2013A&A...555A.142I 2013A&A...555A.142I
ADC_Keywords: Supernovae ; Spectroscopy
Keywords: supernovae: general - supernovae: individual: SN 2009dd -
supernovae: individual: SN 2007pk -
supernovae: individual: SN 2010aj -
supernovae: individual: SN 1995ad -
supernovae: individual: SN 1996W
Abstract:
Core-collapse Supernovae (CC-SNe) descend from progenitors more
massive than about 8M☉. Because of the young age of the progenitors,
the ejecta may eventually interact with the circumstellar medium (CSM)
via highly energetic processes detectable in the radio, X-ray,
ultraviolet (UV) and, sometimes, in the optical domains. In this paper
we present ultraviolet, optical and near infrared observations of five
type II SNe, namely SNe 2009dd, 2007pk, 2010aj, 1995ad, and 1996W.
Together with few other SNe they form a group of moderately luminous
type II events. We investigate the photometric similarities and
differences among these bright objects. We also attempt to
characterise them by analysing the spectral evolutions, in order to
find some traces of CSM-ejecta interaction. We collected photometry
and spectroscopy with several telescopes in order to construct
well-sampled light curves and spectral evolutions from the
photospheric to the nebular phases. Both photometry and spectroscopy
indicate a degree of heterogeneity in this sample. Modelling the data
of SNe 2009dd, 2010aj and 1995ad allows us to constrain the explosion
parameters and the properties of the progenitor stars. The light
curves have luminous peak magnitudes (-16.95<MB-18.70). The
ejected masses of 56Ni for three SNe span a wide range of values
(2.8x10-2M☉<M(56Ni)<1.4x10-1^M☉), while for a
fourth (SN2010aj) we could determine a stringent upper limit
(7x10-3M☉).
Clues of interaction, such as the presence of high velocity (HV)
features of the Balmer lines, are visible in the photospheric spectra
of SNe 2009dd and 1996W. For SN2007pk we observe a spectral transition
from a type IIn to a standard type II SN. Modelling the observations
of SNe 2009dd, 2010aj and 1995ad with radiation hydrodynamics codes,
we infer kinetic plus thermal energies of about 0.2-0.5 foe, initial
radii of 2-5x1013cm and ejected masses of ∼5.0-9.5M☉. These
values suggest moderate-mass, super-asymptotic giant branch (SAGB) or
red super-giants (RSG) stars as SN precursors, in analogy with other
luminous type IIP SNe 2007od and 2009bw.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sn.dat 76 5 List of studied supernovae
tablea6.dat 109 48 Journal of spectroscopic observations of the SNe
table1.dat 70 16 Instrumental configurations
sp/* . 47 Individual FITS spectra
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
II/256 : Sternberg Supernova Catalogue, 2004 version (Tsvetkov+, 2004)
J/A+A/538/A120 : A unified supernova catalogue (Lennarz+, 2012)
J/A+A/544/A81 : Supernovae and their hosts in the SDSS DR8 (Hakobyan+, 2012)
J/MNRAS/412/1419 : Nearby supernova rates (Leaman+, 2011)
Byte-by-byte Description of file: sn.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [SN]
4- 9 A6 --- SN Supernova name (YYYYaa)
13- 14 I2 h RAh Right ascension (J2000)
16- 17 I2 min RAm Right ascension (J2000)
19- 23 F5.2 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 35 F4.1 arcsec DEs Declination (J2000)
37- 50 A14 --- Host Host galaxy
52- 54 A3 --- MType Host galaxy type
56- 64 F9.1 d t.exp Explosion epoch (JD)
66 I1 d e_t.exp rms uncertainty on Exp
68- 74 I7 d t.peak Light curve peak date (JD)
76 I1 d e_t.peak rms uncertainty on Peak
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Byte-by-byte Description of file: tablea6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- --- [SN]
4- 9 A6 --- SN Supernova name (YYYYaa)
11- 20 A10 "YYYY/MM/DD" Date Observation date
22- 28 F7.1 d JD Julian date of observation (JD-2400000)
30- 34 F5.1 d Phase [5/510] Phase with respect to explosion epoch
36- 65 A30 --- Inst Instrumental configuration (as in Table1)
67- 70 I4 0.1nm lam0 [2850/8660] Lower value of wavelength range
71 A1 --- --- [-]
72- 76 I5 0.1nm lam1 [5000/13480] Upper value of wavelength range
78- 85 A8 --- Res Spectral resolution(s) (1)
87-109 A23 --- SpFile Name of the spectrum FITS file in
subdirectory sp
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Note (1): measured from the full-width at half maximum (FWHM)
of the night sky lines.
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Tel Telescope (1)
13- 15 F3.1 m Mir [0.3/3.6] Primary mirror diameter
17- 25 A9 --- Cam Camera
26 A1 --- n_Cam [+] + for Instruments used until 1998
28- 31 I4 pix Nx CCD size along x
32 A1 --- --- [x]
33- 36 I4 --- Ny CCD size along y
38- 55 A18 --- CCD CCD designation
57- 60 F4.2 arcsec/pix Scale Pixel scale
62- 70 A9 arcmin Field field of view (arcmin)
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Note (1): Telescopes as follows:
Ekar = Copernico Telescope (Mt. Ekar, Asiago, Italy)
TNG = Telescopio Nazionale Galileo (La Palma, Spain)
LT = Liverpool Telescope (La Palma, Spain)
NOT = Nordic Optical Telescope (La Palma, Spain)
CAHA = Calar Alto Observatory 2.2m Telescope (Sierra de los Filabres,
Andalucia, Spain)
SWIFT = SWIFT by NASA
NTT = New Technology Telescope (La Silla, Chile)
ESO 1.5 = ESO 1.5m Telescope (La Silla, Chile)
MPG-ESO 2.2 = MPG-ESO 2.2m Telescope (La Silla, Chile)
ESO 3.6 = ESO 3.6m Telescope (La SIlla, Chile)
Dutch = Dutch 0.9m Telescope (La Silla, Chile)
Danish = Danish 1.5m Telescope (La Silla, Chile)
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Acknowledgements:
Cosimo Inserra, c.inserra(at)qub.ac.uk
(End) Cosimo Inserra [QUB, England], Patricia Vannier [CDS] 23-May-2013