Nebular velocities in type Ia Supernovae and their relationship to light curves

Abstract

Recently gathered observational data on a sample of Type Ia Supernovae (SNe Ia) reveal a wide distribution of expansion velocities of the Fe cores, measured from the width of the nebular lines. Moreover, the velocity appears to correlate with the luminosity decline rate after maximum light, $\Delta m_{15}(B)$. Since it has been shown that for SNe Ia $\Delta m_{15}(B)$ correlates with the absolute magnitude at maximum, this then implies a relation between the expansion velocity of the Fe nebula and the luminosity at maximum. Physically, the maximum luminosity is related to the mass of synthesized ${}^{56}$Ni, whereas the FWHM of the lines is related to the kinetic energy of the ejecta. Our finding constitutes observational proof of the theoretical prediction that the two quantities have to be related.

10 pages, including 2 figures - accepted to ApJ Letter

References in corpus (2)

• Optical Light Curves of the Type Ia Supernovae 1990N and 1991T
• Globular Cluster Calibration of the Peak Brightness of the Type Ia Supernova 1992A and the Value of Ho

Cited by in corpus (74)

• Nucleosynthesis in Chandrasekhar Mass Models for Type Ia Supernovae and Constraints on Progenitor Systems and Burning-Front Propagation
• Observational clues to the progenitors of Type-Ia supernovae
• A Common Explosion Mechanism for Type Ia Supernovae
• Head-on collisions of white dwarfs in triple systems could explain type Ia supernova
• The Spectroscopic Diversity of Type Ia Supernovae
• Secondary Maximum in the Near-Infrared Lightcurves of Type Ia Supernovae
• Fourteen Months of Observations of the Possible Super-Chandrasekhar Mass Type Ia Supernova 2009dc
• Supernova 2002bo: inadequacy of the single parameter description
• Late-Time Spectroscopy of SN 2002cx: The Prototype of a New Subclass of Type Ia Supernovae
• Hubble Space Telescope spectra of the type Ia supernova SN2011fe: a tail of low-density, high-velocity material with Z<Zsolar
• Anomalous extinction behaviour towards the Type Ia SN 2003cg
• Optical Spectroscopy of Type Ia Supernovae
• ESC and KAIT Observations of the Transitional Type Ia SN 2004eo
• Consistent estimates of (56)Ni yields for type Ia supernovae
• The Origin of Diversity of Type Ia Supernovae and Environmental Effects
• The ejected mass distribution of type Ia supernovae: A significant rate of non-Chandrasekhar-mass progenitors
• Spectroscopic Observations and Analysis of the Peculiar SN 1999aa
• Can differences in the nickel abundance in Chandrasekhar mass models explain the relation between brightness and decline rate of normal Type Ia Supernovae?
• The Absolute Magnitudes of Type Ia Supernovae in the Ultraviolet
• Detection of a light echo from SN1998bu
• Supernova type Ia luminosities, their dependence on second parameters, and the value of H_0
• The normal Type Ia SN 2003hv out to very late phases
• Using Line Profiles to Test the Fraternity of Type Ia Supernovae at High and Low Redshifts
• The Outermost Ejecta of Type Ia Supernovae
• The template type Ia supernova 1996X
• Hubble Space Telescope studies of low-redshift Type Ia supernovae: Evolution with redshift and ultraviolet spectral trends
• Nebular spectra and abundance tomography of the type Ia supernova SN 2011fe: a normal SN Ia with a stable Fe core
• Measuring nickel masses in Type Ia supernovae using cobalt emission in nebular phase spectra
• SNLS Spectroscopy: Testing for Evolution in Type Ia Supernovae
• On the Spectrum and Nature of the Peculiar Type Ia Supernova 1991T
• Exploring the spectroscopic diversity of Type Ia Supernovae
• Effects of Explosion Asymmetry and Viewing Angle on the Type Ia Supernova Color and Luminosity Calibration
• Secondary Parameters of Type Ia Supernova Light Curves
• Classification of Supernovae
• Near-Ultraviolet Properties of a Large Sample of Type Ia Supernovae as Observed with the Swift UVOT
• Hubble Space Telescope and Ground-Based Observations of the Type Iax Supernovae SN 2005hk and SN 2008A
• Could There Be A Hole In Type Ia Supernovae?
• 'Super-Chandrasekhar' Type Ia Supernovae at nebular epochs
• A new faint Type Ia Supernova: SN 1997cn in NGC 5490
• A review of type Ia supernova spectra
• Type Ia supernovae have two physical width-luminosity relations and they favor sub-Chandrasekhar and direct collision models. I. Bolometric
• Berkeley Supernova Ia Program V: Late-Time Spectra of Type Ia Supernovae
• Spectroscopy of the type Ia supernova SN 2002er: days -11 to +215
• Abundance stratification in Type Ia Supernovae - IV: the luminous, peculiar SN 1991T
• The (54Fe+58Ni)/56Ni ratio as a second parameter for Type Ia supernova properties
• Nebular Models of Sub-Chandrasekhar Mass Type Ia Supernovae: Clues to the Origin of Ca-rich Transients
• Abundance stratification in Type Ia supernovae - V. SN 1986G bridging the gap between normal and subluminous SNe Ia
• Photometric and spectroscopic observations, and abundance tomography modelling of the type Ia supernova SN 2014J located in M82
• Optical and near infrared observations of SN 1998bu
• The nebular spectrum of the type Ia supernova 2003hv: evidence for a non-standard event
• Berkeley Supernova Ia Program: Data Release of 637 Spectra from 247 Type Ia Supernovae
• Spectroscopy of the Type Ia supernova 2011fe past 1000 days
• Near-infrared light curves of Type Ia supernovae: Studying the properties of the second maximum
• Cosmic gamma-ray background from Type Ia supernovae revisited: Evidence for missing gamma-rays at MeV
• Progressive Red Shifts in the Late-Time Spectra of Type Ia Supernovae
• The nebular spectra of the transitional Type Ia Supernovae 2007on and 2011iv: broad, multiple components indicate aspherical explosion cores
• Carnegie Supernova Project-II: Using Near-Infrared Spectroscopy to determine the location of the outer ${}^{56}$Ni in Type Ia Supernovae
• Understanding nebular spectra of Type Ia supernovae
• ASASSN-15pz: Revealing Significant Photometric Diversity among 2009dc-like, Peculiar SNe Ia
• The nature of PISN candidates: clues from nebular spectra
• A Physical Basis for the H-band Blue-edge Velocity and Light-Curve Shape Correlation in Context of Type Ia Supernova Explosion Physics
• A Significantly off-center Ni56 Distribution for the Low-Luminosity Type Ia Supernova SN 2016brx from the 100IAS survey
• Optical Light Curves of Supernovae
• iPTF16abc and the population of Type Ia supernovae: Comparing the photospheric, transitional and nebular phases
• Limits on stable iron in TypeIa supernovae from NIR spectroscopy
• The intermediate nebular phase of SN 2014J: onset of clumping as the source of recombination
• Supernova 2010ev: A reddened high velocity gradient type Ia supernova
• SN 2015bp: adding to the growing population of transitional type Ia supernovae
• The First CO Map of a Low Surface Brightness Galaxy
• Thermonuclear Burning Regimes and the Use of SNe Ia in Cosmology
• Supernova Resonance--scattering Line Profiles in the Absence of a Photosphere
• Abundance stratification in type Ia supernovae -- VI: the peculiar slow decliner SN\,1999aa
• SN 2014J in M82: New Insights On the Spectral Diversity of Type Ia Supernovae
• Normal or transitional? The evolution and properties of two type Ia supernovae in the Virgo cluster