PECULIAR OPTICAL AND IR BEHAVIOUR IN TYPE I SUPERNOVAE, AND THE ORIGIN OF THE 1.2 ABSORPTION

PDF Version Also Available for Download.

Description

A small number of type I supernovae exhibit well defined peculiarities. In particular some type I supernovae do not have the characteristic 6150 {angstrom} feature and some do not have the 1.2 {micro}m absorption. It is noted that all SN which lack the infrared absorption also lack the 6150 {angstrom} feature which is attributed to Si II. It is proposed that these supernovae constitute a single sub-class and that Si could be responsible for the strong unidentified infrared absorption which is characteristic of classical SNI. Si I has a dense array of strong lines in the near infrared so this ... continued below

Creation Information

Graham, J.R. November 1, 1985.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Author

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

A small number of type I supernovae exhibit well defined peculiarities. In particular some type I supernovae do not have the characteristic 6150 {angstrom} feature and some do not have the 1.2 {micro}m absorption. It is noted that all SN which lack the infrared absorption also lack the 6150 {angstrom} feature which is attributed to Si II. It is proposed that these supernovae constitute a single sub-class and that Si could be responsible for the strong unidentified infrared absorption which is characteristic of classical SNI. Si I has a dense array of strong lines in the near infrared so this ion could be responsible for the dominant features of SNIa IR behaviour. If this hypothesis is vindicated by subsequent observations or by calculation of synthetic spectra then it is most likely that the difference between ordinary supernovae and these peculiar ones is the abundance of Si.

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: LBL-20533
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.2172/1004149 | External Link
  • Office of Scientific & Technical Information Report Number: 1004149
  • Archival Resource Key: ark:/67531/metadc836677

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • November 1, 1985

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

Description Last Updated

  • June 15, 2016, 9:15 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 4

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Graham, J.R. PECULIAR OPTICAL AND IR BEHAVIOUR IN TYPE I SUPERNOVAE, AND THE ORIGIN OF THE 1.2 ABSORPTION, report, November 1, 1985; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc836677/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.