English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
 Local TagsRelease HistoryDetailsSummary
  Infrared Properties of the Halo, Bulge and Disk of the Edge-On Galaxy NGC 7814

Simmat, E. (2009). Infrared Properties of the Halo, Bulge and Disk of the Edge-On Galaxy NGC 7814. Diploma Thesis, Ruprecht-Karls Universität, Heidelberg.

Item is

 

show all hide all

Basic

show hide
Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-774E-C Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-774F-A
Genre: Thesis

Files

show Files
hide Files
:
DiplomarbeitEllenSimmat2009.pdf (Any fulltext), 9MB
View   Save
File Permalink:
https://hdl.handle.net/11858/00-001M-0000-0011-774D-E
Name:
DiplomarbeitEllenSimmat2009.pdf
Description:
-
OA-Status:
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
View
Copyright Date:
-
Copyright Info:
eDoc_access: PUBLIC
License:
-

Locators

show

Creators

show
hide
 Creators:
Simmat, Ellen1, Author           
Affiliations:
1Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550              

Content

show
hide
Free keywords: -
 Abstract: Highly resolved images of the edge-on galaxy NGC 7814 from 2MASS and Spitzer were used to extract the morphologies and spectral energy distributions (SEDs) of the disk, bulge and halo components of this galaxy over a wavelength range from 1.25 to 24 μm. This represents the first direct determination of the mid-infrared emission of the bulge and halo components of a galaxy other than the Milky Way. The SEDs of all three structures imply the presence of emission components from direct stellar light and from at least one further component. For the disk, this further component is interpreted as dust emission having properties typical of star forming disks. The emission from the bulge and the halo is very significantly in excess of that from an extrapolation of the near infrared emission from stars. This excess has a flat spectrum between 8 and 24 μm bands and has an unknown origin. I discuss potential explanations such as dust emission in an interstellar medium, galactic winds, star forming regions and circumstellar dust, as well as emission from brown dwarfs. Further analysis is needed to test these hypotheses.

Details

show
hide
Language(s): eng - English
 Dates: 2009
 Publication Status: Accepted / In Press
 Pages: XII, 74 S. : Ill., graph. Darst.
 Publishing info: Heidelberg : Ruprecht-Karls Universität
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 450818
 Degree: Diploma

Event

show

Legal Case

show

Project information

show

Source

show