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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 43 151 Proper Motions in the Central Orion Nebula
See also: V/104 : General Catalogue of Herbig-Haro Objects (Reipurth+, 1999) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
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
Note (1): The designation follows the position-based system of O'Dell and Wen, 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.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 09-Oct-2005
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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