ON THE SOURCE OF THE DUST EXTINCTION IN TYPE Ia SUPERNOVAE AND THE DISCOVERY OF ANOMALOUSLY STRONG Na i ABSORPTION

@article{Phillips2013ONTS,
  title={ON THE SOURCE OF THE DUST EXTINCTION IN TYPE Ia SUPERNOVAE AND THE DISCOVERY OF ANOMALOUSLY STRONG Na i ABSORPTION},
  author={Mark M. Phillips and Joshua D. Simon and Nidia I. Morrell and Christopher R. Burns and Nick L. J. Cox and Ryan J. Foley and Amanda I. Karakas and Ferdinando Patat and Assaf Sternberg and R. E. Williams and Avishay Gal-yam and Eric Y. Hsiao and Douglas C. Leonard and Sven Eric Persson and Maximilian D. Stritzinger and Ian B. Thompson and Abdo Campillay and Carlos Contreras and Gast{\'o}n Folatelli and Wendy L. Freedman and Mario Hamuy and Miguel R. Roth and Gregory Alan Shields and Nicholas B. Suntzeff and Laura B. Chomiuk and Inese I. Ivans and Barry F. Madore and Bryan Edward Penprase and Daniel A. Perley and Giuliano Pignata and George W. Preston and Alicia Margarita Soderberg},
  journal={The Astrophysical Journal},
  year={2013},
  volume={779}
}
High-dispersion observations of the Na i D λλ5890, 5896 and K i λλ7665, 7699 interstellar lines, and the diffuse interstellar band at 5780 Å in the spectra of 32 Type Ia supernovae are used as an independent means of probing dust extinction. We show that the dust extinction of the objects where the diffuse interstellar band at 5780 Å is detected is consistent with the visual extinction derived from the supernova colors. This strongly suggests that the dust producing the extinction is… 

Properties and Alignment of Interstellar Dust Grains toward Type Ia Supernovae with Anomalous Polarization Curves

Recent photometric and polarimetric observations of Type Ia supernovae (SNe Ia) show unusually low total-to-selective extinction ratios (RV < 2) and wavelengths of maximum polarization (λmax < 0.4

Properties of extragalactic dust inferred from linear polarimetry of Type Ia Supernovae

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The Extinction Properties of and Distance to the Highly Reddened Type IA Supernova 2012cu

Correcting Type Ia Supernova brightnesses for extinction by dust has proven to be a vexing problem. Here we study the dust foreground to the highly reddened SN 2012cu, which is projected onto a dust

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We present a comprehensive analysis of interstellar absorption lines seen in moderately high resolution, high signal-to-noise ratio optical spectra of SN 2014J in M82. Our observations were acquired

Probing gas and dust in the tidal tail of NGC 5221 with the type Ia supernova iPTF16abc

Context. Type Ia supernovae (SNe Ia) can be used to address numerous questions in astrophysics and cosmology. Due to their well known spectral and photometric properties, SNe Ia are well suited to

OPTICAL AND NEAR-INFRARED POLARIMETRY OF HIGHLY REDDENED Type Ia SUPERNOVA 2014J: PECULIAR PROPERTIES OF DUST IN M82

We present optical and near-infrared multi-band linear polarimetry of the highly reddened Type Ia supernova (SN) 2014J that appeared in M82. SN 2014J exhibits large polarization at shorter

Type Ia supernovae with and without blueshifted narrow Na I D lines - how different is their structure?

In studies on intermediate- and high-resolution spectra of Type Ia supernovae (SNe Ia), some objects exhibit narrow Na I D absorptions often blueshifted with respect to the rest wavelength within the

Constraining the Amount of Circumstellar Matter and Dust around Type Ia Supernovae through Near-Infrared Echoes

The circumstellar (CS) environment is key to understanding progenitors of type Ia supernovae (SNe Ia), as well as the origin of a peculiar extinction property toward SNe Ia for cosmological

Dusting off the diffuse interstellar bands: DIBs and dust in extragalactic Sloan Digital Sky Survey spectra

Using over a million and a half extragalactic spectra we study the properties of the mysterious Diffuse Interstellar Bands (DIBs) in the Milky Way. These data provide us with an unprecedented

The Cold and Dusty Circumstellar Matter around Fast-expanding Type Ia Supernovae

SNe Ia play key roles in revealing the accelerating expansion of the universe, but our knowledge of their progenitors is still very limited. Here we report the discovery of a rigid dichotomy in
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