| Issue |
A&A
Volume 411, Number 3, December I 2003
|
|
|---|---|---|
| Page(s) | 477 - 480 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20031563 | |
| Published online | 17 November 2003 | |
Research Note
Planetary nebula K1-9
Fessenkov Astrophysical Institute, Kazakhstan Isaak Newton Institute of Chile, Kazakhstan Branch
Corresponding author: L. Kondratyeva, kon@.afi.south-capital.kz
Received:
29
January
2002
Accepted:
11
September
2003
The object K1-9 with strong [
] emission lines
was included in the Perek and Kohoutek Catalogue of Planetary Nebulae, but
later it was considered to be an 
region. Our results show that in addition to the low-excitation emissions there
are 
and [
] emission lines in its spectrum, and
the effective
temperature of the central star is more than 54 000 
. Thus we conclude
that K1-9 is indeed a planetary nebula. Distribution of
[]
and [] emission lines reflect a ring-like structure
with a clear minimum in the centre of the nebula. Hydrogen lines
almost fail to show
the central gap. K1-9 has the backward proper motion with
systemic velocity 
km s-1. The central hydrogen
component moves relative to the nebula with a pecular velocity of about
–50 km s-1.
Key words: planetary nebulae: general / planetary nebulae: individual: K1-9
© ESO, 2003
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