SUMMARY OF SEQUENCE NUMBER 200039
SUMMARY OF SEQUENCE NUMBER 200039
Title: FK COM: SHROUDED IN MYSTERY
Observer: Buzasi
Subject Category: Normal Stars and WD
Seq: 200039 ObsId: 00614
Long-term Plan bin: no LTS bin
ABSTRACT
FK Com is a single G-type giant rotating near the breakup velocity which is considered to be a recently coalesced binary. While generally displaying extreme levels of activity, FK Com is highly variable and surprisingly underluminous at X-ray wavelengths. This observed deficiency may be due either to obscuring material around the star, or to a dynamo mechanism which differs from that operating in other cool stars. We propose to observe FK Com and two similar stars, HD 199178 and LW Hya, to address this issue and others, such as the contribution of flaring to the observed X-ray luminosity and the question of whether or not the corona is corotating. In the case of LW Hya, we propose to use ACIS-I for a quick first look, while we will use HETG for an in-depth study of FK Com and HD 199178.
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| FK COM/HD 117555 |
202.695417 | 24.233028 |
40.00000 |
ACIS-S |
HETG |
GO |
no |
no |
no |
no |
yes |
5 |
IMAGES
(NOTE: RASS images currently only available for targets LTS scheduled on or after Apr-09-2000)
PARAMETERS
Obscat Parameters
