Observations of the Type II-P SN 1991G in NGC 4088

Blanton, E. L.; Schmidt, B.; Kirshner, R.; Ford, Charles; Chromey, F. R.; Herbst, W.

doi:10.1086/117735

Cited by 22 publications

(18 citation statements)

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“…Excellent examples of SNe II-P are SN 1969L (Ciatti et al 1971), SN 1986I (Pennypacker et al 1989), SN 1988A (Turatto et al 1993a, SN 1990E (Schmidt et al 1993, and SN 1991G (Blanton et al 1995). At very early times, the spectrum is nearly featureless and quite blue, indicating a high color temperature ( 10,000 K).…”

Section: Type Ii-p Supernovaementioning

confidence: 99%

Optical Spectra of Supernovae

Filippenko

1997

Annu. Rev. Astron. Astrophys.

1,672

1,405

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The temporal evolution of the optical spectra of various types of supernovae (SNe) is illustrated, in part to aid observers classifying supernova candidates. Type II SNe are defined by the presence of hydrogen, and they exhibit a very wide variety of photometric and spectroscopic properties. Among hydrogen-deficient SNe (Type I), three subclasses are now known: those whose early-time spectra show strong Si II (Ia), prominent He I (Ib), or neither Si II nor He I (Ic). The late-time spectra of SNe Ia consist of a multitude of blended emission lines of iron-group elements; in sharp contrast, those of SNe Ib and SNe Ic (which are similar to each other) are dominated by several relatively unblended lines of intermediatemass elements. Although SNe Ia, which result from the thermonuclear runaway of white dwarfs, constitute a rather homogeneous subclass, important variations in their photometric and spectroscopic properties are undeniably present. SNe Ib/Ic probably result from core collapse in massive stars largely stripped of their hydrogen (Ib) and helium (Ic) envelopes, and hence they are physically related to SNe II. Indeed, the progenitors of some SNe II seem to have only a low-mass skin of hydrogen; their spectra gradually evolve to resemble those of SNe Ib. In addition to the two well-known photometric subclasses (linear and plateau) of SNe II, which may exhibit minor spectroscopic differences, there is a new subclass (SNe IIn) distinguished by relatively narrow emission lines with little or no P Cygni absorption component and slowly declining light curves. These objects probably have unusually dense circumstellar gas with which the ejecta interact.

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Section: Type Ii-p Supernovaementioning

confidence: 99%

Optical Spectra of Supernovae

Filippenko

1997

Annu. Rev. Astron. Astrophys.

1,672

1,405

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“…This suggests that stellar mass plays a central role in the physics of core collapse. The second remarkable result (bottom panel) is that SNe with greater energies produce more nickel (a result previously suggested by Blanton et al 1995). This could mean that greater temperatures and more nuclear burning are reached in such SNe, and/or that less mass falls back onto the neutron star/black hole in more energetic explosions.…”

Section: Physical Properties Of Type II Plateau Supernovaementioning

confidence: 53%

Observed and physical properties of Type II plateau supernovae

Hamuy¹

2004

Cosmic Explosions in Three Dimensions

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I use photometry and spectroscopy data for 24 Type II plateau supernovae to examine their observed and physical properties. This dataset shows that these objects encompass a wide range in their observed properties (plateau luminosities, tail luminosities, and expansion velocities) and their physical parameters (explosion energies, ejected masses, initial radii, and 56 Ni yields). Several regularities emerge within this diversity, which reveal (1) a continuum in the properties of Type II plateau supernovae, (2) a one parameter family (at least to first order), (3) evidence that stellar mass plays a central role in the physics of core collapse and the fate of massive stars.

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“…mass), with the latter determining the outcome. Second (bottom panel), SNe with greater energies produce more nickel, a result previously suggested by Blanton et al (1995). This could mean that greater temperatures and more nuclear burning are reached in such SNe, and/or that less mass falls back onto the neutron star/black hole in more energetic explosions.…”

Section: +14mentioning

confidence: 67%

“…Table 1 summarizes the resulting parameters and those independently derived for SN 1987A (Arnett 1996), SN 1997D and SN 1999br (Zampieri et al 2003, which reveals the following, • There is a wide range in explosion energies, from 0.6 to 5.5 foes (1 foe = 10 51 ergs) among classical SNe II. Benetti et al (1991), Turatto et al (1993b) for SN 1988A; Schmidt (2003) for SN 1989L; Schmidt et al (1993) and Benetti et al (1994) for SN 1990E; Blanton et al (1995Tsvetkov (1994) and Clocchiatti et al (1996a) for SN 1992H; Hamuy (2001Suntzeff et al (2003) and Leonard et al (2002aand Leonard et al (2002b) for SN 1999gi.…”

Section: Classical Type II Supernovaementioning

confidence: 95%

Review on the Observed and Physical Properties of core Collapse Supernovae

Hamuy

2004

Astrophysics and Space Science Library

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Core collapse supernovae prove to comprise the most common general class of exploding star in the Universe and they come in a great variety of flavors. The wide range of luminosities, expansion velocities, and chemical abundances displayed by these objects is evidence for large variations in explosion energy and in the properties of their progenitors. This paper summarizes observed and physical properties of all types of core collapse supernovae. Despite the great diversity displayed by these objects, several regularities emerge which suggest that 1) there is a continuum in the properties of these objects, 2) the mass of the envelope is one of the driving parameters of the explosion, or it is correlated with some other property of the core, with the latter determining the outcome of the explosion, and 3) the physics of the core and explosion mechanism of all core collapse supernovae are not be fundamentally different, regardless of the external appearance of the supernova. Far above in energy scale and 56 Ni production lies SN 1998bw, the only supernova firmly associated with a gamma-ray burst.

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Observations of the Type II-P SN 1991G in NGC 4088

Cited by 22 publications

References 0 publications

Optical Spectra of Supernovae

Optical Spectra of Supernovae

Observed and physical properties of Type II plateau supernovae

Review on the Observed and Physical Properties of core Collapse Supernovae

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