NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
A study of EUV emission from the O4f star Zeta PuppisOur 20 ks observation did not allow us to carry out our primary objective, i.e., to test the limitations of deeply embedded EUV and X-ray sources. However, it did provide a very useful constraint in our analysis of a newly acquired high S/N ROSAT PSPC X-ray spectrum of Zeta Pup. In addition, modifications to our stellar wind opacity code have been preformed to investigate the sensitivity of the EUV opacity energy range to different photospheric model flux inputs and different wind structures. These analyses provided the justification for a 140 ks follow up EUVE Cycle III observation of this star. We have recently been informed that our requested observation has been accepted as a Type 1 target for Cycle III. The remainder of this report focuses on the following: (1) a brief background on the status of X-ray emission from OB stars; (2) a discussion on the importance of EUV observations; (3) a discussion of our scientific objectives; and (4) a summary of our technical approach for our Cycle III observation (including the predicted EUV counts for various lines.)
Document ID
19950017052
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Waldron, Wayne L. (Applied Research Corp. Landover, MD, United States)
Vallerga, John (Eureka Scientific, Inc. Oakland, CA., United States)
Date Acquired
September 6, 2013
Publication Date
February 9, 1995
Subject Category
Space Radiation
Report/Patent Number
NAS 1.26:197350
NASA-CR-197350
ARC-R95-233
Accession Number
95N23472
Funding Number(s)
CONTRACT_GRANT: NASA ORDER S-14648-F
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available