J/AJ/125/277 High proper motions in central Orion nebula (O'dell+, 2003)
High proper motion features in the central Orion nebula.
O'dell C.R., Doi T.
<Astron. J., 125, 277-287 (2003)>
=2003AJ....125..277O 2003AJ....125..277O
ADC_Keywords: Stars, pre-main sequence ; Interstellar medium ; Proper motions
Keywords: ISM: Herbig-Haro objects - ISM: individual (Orion Nebula) -
ISM: jets and outflows - stars: winds, outflows
Abstract:
The brightest portion of the Orion Nebula has been reimaged with the
Hubble Space Telescope in Hα, [N II], and [O III]. Comparison
with earlier Wide Field Planetary Camera 2 images going back as much
as 8yr has allowed determination of tangential velocities (proper
motions) down to about 10km/s for a variety of sources. Multiple
outflow systems are found associated with individual proplyds in the
ionized portion of the nebula (HH 518, HH 624, possibly HH 507). The
Orion-S complex of radio and infrared sources is the source of
multiple outflows. A new outflow system (HH 625) has been identified
as coming from the blueshifted portion of the imbedded high velocity
CO flow coming from the Orion-S region, this object having CO, H2, and
low ionization optical components. The low velocity CO outflow
originating from or near FIR 4 is the likely source of HH 530. A new
imbedded source is inferred from this optical data to lie in Orion-S.
This optical outflow source (OOS) clearly feeds the systems HH 269 and
HH 529, which lie along a straight line. There is evidence that this
is also the source for HH 528, HH 202, and HH 203/204, all of which
are blueshifted (except possibly HH 528 whose radial velocity is
unknown). There is no strong radio, infrared, or X-ray source within
the positional ellipse of the OOS.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 43 151 Proper Motions in the Central Orion Nebula
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See also:
V/104 : General Catalogue of Herbig-Haro Objects (Reipurth+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Designation (1)
10- 17 A8 --- HH Herbig-Haro associated object (1)
18- 20 I3 km/s TVel Derived proper motion (tangential velocity)
22- 24 I3 deg PA Position angle of the motion vector
26- 33 A8 --- Filt Filter used (Hα, [N II] or [O III])
35- 43 A9 --- Prog1 First-epoch program identification
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Note (1): The designation follows the position-based system of O'Dell
and Wen, 1994ApJ...436..194O 1994ApJ...436..194O (acronym [OW94] in Simbad), so that it
is basically ordered by increasing right ascension, but features
belonging to a particular Herbig Haro (HH) group (Reipurth, 2002,
Cat. V/104) are located together.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 09-Oct-2005