Optical Observations of the Type Ia Supernova 2011fe in M101 for Nearly 500 Days

Abstract

We present well-sampled optical observations of the bright Type Ia supernova (SN~Ia) SN 2011fe in M101. Our data, starting from $\sim 16$ days before maximum light and extending to $\sim 463$ days after maximum, provide an unprecedented time series of spectra and photometry for a normal SN~Ia. Fitting the early-time rising light curve, we find that the luminosity evolution of SN 2011fe follows a $t^n$ law, with the index $n$ being close to 2.0 in the $VRI$ bands but slightly larger in the $U$ and $B$ bands. Combining the published ultraviolet (UV) and near-infrared (NIR) photometry, we derive the contribution of UV/NIR emission relative to the optical. SN 2011fe is found to have stronger UV emission and reaches its UV peak a few days earlier than other SNe~Ia with similar $\Delta m_{15}(B)$, suggestive of less trapping of high-energy photons in the ejecta. Moreover, the $U$-band light curve shows a notably faster decline at late phases ($t\approx 100$--300 days), which also suggests that the ejecta may be relatively transparent to UV photons. These results favor the notion that SN 2011fe might have a progenitor system with relatively lower metallicity. On the other hand, the early-phase spectra exhibit prominent high-velocity features (HVFs) of O~I $\lambda$7773 and the Ca~II~NIR triplet, but only barely detectable in Si~II~6355. This difference can be caused either by an ionization/temperature effect or an abundance enhancement scenario for the formation of HVFs; it suggests that the photospheric temperature of SN 2011fe is intrinsically low, perhaps owing to incomplete burning during the explosion of the white dwarf.

arXiv commentaccepted for publication in ApJ

References in corpus (54)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Reddening-Free Decline Rate Versus Luminosity Relationship for Type Ia Supernovae
• Supernova 2011fe from an Exploding Carbon-Oxygen White Dwarf Star
• Seeing the Collision of a Supernova with its Companion Star
• The diversity of Type Ia Supernovae: evidence for systematics?
• Type Ia Supernovae: Influence of the Initial Composition on the Nucleosynthesis, Light Curves, Spectra and Consequences for the Determination of Omega_M & Lambda
• On Variations in the Peak Luminosity of Type Ia Supernovae
• Constraints on the Progenitor System of the Type Ia Supernova SN 2011fe/PTF11kly
• A Compact Degenerate Primary-Star Progenitor of SN 2011fe
• Improved Distances to Type Ia Supernovae with Two Spectroscopic Subclasses
• The Risetime of Nearby Type Ia Supernovae
• Spectrophotometric time series of SN 2011fe from the Nearby Supernova Factory
• Optical and Near-Infrared Observations of the Highly Reddened, Rapidly Expanding Type Ia Supernova 2006X in M100
• A New Cepheid Distance to the Giant Spiral M101 Based On Image Subtraction of HST/ACS Observations
• What Can We Learn from the Rising Lightcurves of Radioactively-Powered Supernovae?
• Evidence for Two Distinct Populations of Type Ia Supernovae
• SN 2003du: 480 days in the Life of a Normal Type Ia Supernova
• EVLA Observations Constrain the Environment and Progenitor System of Type Ia Supernova 2011fe
• Metallicity Effects in NLTE Model Atmospheres of Type Ia Supernovae
• A Golden Standard Type Ia Supernova SN 2005cf: Observations from the Ultraviolet to the Near-Infrared Wavebands
• The Rise-Time Distribution of Nearby Type Ia Supernovae
• Very Early Ultraviolet and Optical Observations of the Type Ia Supernova 2009ig
• The oxygen abundance in the inner HII regions of M101. Implications for the calibration of strong-line metallicity indicators
• Early radio and X-ray observations of the youngest nearby type Ia supernova PTF11kly (SN 2011fe)
• The Rising Light Curves of Type Ia Supernovae
• A Swift Look at SN 2011fe: The Earliest Ultraviolet Observations of a Type Ia Supernova
• BVRI lightcurves of supernovae SN 2011fe in M101, SN 2012aw in M95, and SN 2012cg in NGC 4424
• No Stripped Hydrogen in the Nebular Spectra of Nearby Type Ia Supernova 2011fe
• Positron Escape from Type Ia Supernovae
• The normal Type Ia SN 2003hv out to very late phases
• Shock Breakout from Type Ia Supernova
• The Rise Time of Type Ia Supernovae from the Supernova Legacy Survey
• The Very Young Type Ia Supernova 2013dy: Discovery, and Strong Carbon Absorption in Early-Time Spectra
• Lower limits on the Hubble Constant from models of Type Ia Supernovae
• Nebular spectra and abundance tomography of the type Ia supernova SN 2011fe: a normal SN Ia with a stable Fe core
• Constraints on Shallow 56Ni from the Early Lightcurves of Type Ia Supernovae
• Late Light Curves of Type Ia Supernovae
• Analysis of the Early-Time Optical Spectra of SN 2011fe in M101
• Properties of the ultraviolet flux of type Ia supernovae: an analysis with synthetic spectra of SN 2001ep and SN 2001eh
• No trace of a single-degenerate companion in late spectra of SNe 2011fe and 2014J
• The Photometric System of Tsinghua-NAOC 80-cm Telescope at NAOC Xinglong Observatory
• The Infrared Light Curve of SN 2011fe in M101 and the Distance to M101
• Multi-epoch high-resolution spectroscopy of SN2011fe - Linking the progenitor to its environment
• Reconciling the infrared catastrophe and observations of SN 2011fe
• Metallicity Differences in Type Ia Supernova Progenitors Inferred from Ultraviolet Spectra
• A Hubble Space Telescope Snapshot Survey of Nearby Supernovae
• Constraining the Progenitor Companion of the Nearby Type Ia SN 2011fe with a Nebular Spectrum at +981 Days
• Twins for life? A comparative analysis of the Type Ia supernovae 2011fe and 2011by
• The Silicon and Calcium High-Velocity Features in Type Ia Supernovae from Early to Maximum Phases
• Spectroscopy of the Type Ia supernova 2011fe past 1000 days
• The Mid-Infrared and Optical Decay of SN 2011fe
• Optical Observations of the Rapidly Expanding Type Ia Supernova 2007gi
• Theoretical Clues to the Ultraviolet Diversity of Type Ia Supernovae
• Spectral Models for Early Time SN 2011fe Observations

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