SUMMARY OF SEQUENCE NUMBER 200065
SUMMARY OF SEQUENCE NUMBER 200065
Title: HIGH-RESOLUTION SPECTRAL DIAGNOSTICS OF O-STAR X-RAY SOURCES
Observer: CASSINELLI
Subject Category: Normal Stars and WD
Seq: 200065 ObsId: 00640
Long-term Plan bin: 28-Mar-2000
ABSTRACT
In the case of the fast O-star winds, the spectrometers on AXAF will provide for the first time the spectral resolution needed to derive velocities of the X-ray emitting material, significant constraints on the location of the emitting regions, and accurate characterizations of the temperature and density conditions of the X-ray sources. The wind absorption occurs not only by bound-free transistions, but by bound-bound inner shell transistions. Thus, diagnostic modelling of the AXAF spectra will provide new information not only about the state of the hot emitting plasma, but also about of the cool wind. We propose AXAF transmission grating observations of 3 bright O-stars: Iota Ori (LETG), Zeta Pup (METG/HETG), and Delta Ori (LETG).
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| ZETA PUP |
120.896250 | -40.003361 |
75.00000 |
ACIS-S |
HETG |
GO |
no |
no |
no |
no |
no |
5 |
IMAGES
(NOTE: RASS images currently only available for targets LTS scheduled on or after Apr-09-2000)
PARAMETERS
Obscat Parameters
