RCW 64
Coordinates: (299.4°, -0.3°)
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RCW 64 appears to be located between the Carina and Scutum-Crux arcs and is part of a complex of 7 nebulae, Bran 386a-g. SIMBAD identifies RCW 64 with Bran 386e.
In a 1997 paper, Russeil speculates that RCW 64 may be part of a spur connecting the Carina arc and the Scutum-Crux (Centaurus) arm. She suggests an association with a specific Grabelsky molecular cloud, but curiously, Grabelsky lists no cloud with the position and velocity cited by Russeil. She also notes that the 5370 parsec distance estimate was given in Brand's 1986 PhD thesis and is based on his observation of ionising stars for RCW 64. Brand's thesis does not seem to be available online, although he gives the same distance estimate in a 1993 paper. I'll add more details on the ionising stars once I can track that down.
RCW 64 can be seen in this Spitzer infrared image floating to the left of a giant HII region and enormous nebular complex (including [GSL2002] 29) that is obscured at visual frequencies.
In a 1997 paper, Russeil speculates that RCW 64 may be part of a spur connecting the Carina arc and the Scutum-Crux (Centaurus) arm. She suggests an association with a specific Grabelsky molecular cloud, but curiously, Grabelsky lists no cloud with the position and velocity cited by Russeil. She also notes that the 5370 parsec distance estimate was given in Brand's 1986 PhD thesis and is based on his observation of ionising stars for RCW 64. Brand's thesis does not seem to be available online, although he gives the same distance estimate in a 1993 paper. I'll add more details on the ionising stars once I can track that down.
RCW 64 can be seen in this Spitzer infrared image floating to the left of a giant HII region and enormous nebular complex (including [GSL2002] 29) that is obscured at visual frequencies.
Brand and Blitz give an estimate of 5370 parsecs for Bran B, C, E and G.[1]
Located between the Carina and Scutum-Crux arms and associated with a Grabelsky 1988 molecular cloud.[2]
Located between the Carina and Scutum-Crux arms and associated with a Grabelsky 1988 molecular cloud.[2]
Notes
1. ^ Brand, J. & Blitz, L. (1993). "The Velocity Field of the Outer Galaxy", Astronomy and Astrophysics, Vol. 275, 67. [1993A&A...275...67B]
2. ^ Russeil, D. (1997). "Hα detection of a clump of distant HII regions in the Milky Way.", Astronomy and Astrophysics, Vol. 319, 788-795. [1997A&A...319..788R]
Distance estimates
5370 pc [1997A&A...319..788R]Links
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Most of the sources used to create these nebula descriptions are listed in the
notes section for each description. In some cases,
for example the Avedisova, Humphreys and Reed catalogs, the source is used extensively and is not listed in the
individual nebula descriptions. See this catalog overview
for more information on the catalogs and the general sources used
to create these descriptions and this introduction to HII regions
on the general history of this area of astronomy.
This image was created using the POSS-II/UKSTU data of the Digitized Sky Survey and SuperCOSMOS using the process described here.
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Use of these images is courtesy of the UK Schmidt Telescope (copyright in which is owned by the Particle Physics and Astronomy Research Council of the UK and the Anglo-Australian Telescope Board) and the Southern Sky Survey as created by the SuperCOSMOS measuring machine and are reproduced here with permission from the Royal Observatory Edinburgh.
and this acknowledgement taken from the DSS site:
The Digitized Sky Surveys were produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions.
The Second Palomar Observatory Sky Survey (POSS-II) was made by the California Institute of Technology with funds from the National Science Foundation, the National Geographic Society, the Sloan Foundation, the Samuel Oschin Foundation, and the Eastman Kodak Corporation.
The UK Schmidt Telescope was operated by the Royal Observatory Edinburgh, with funding from the UK Science and Engineering Research Council (later the UK Particle Physics and Astronomy Research Council), until 1988 June, and thereafter by the Anglo-Australian Observatory. The blue plates of the southern Sky Atlas and its Equatorial Extension (together known as the SERC-J), as well as the Equatorial Red (ER), and the Second Epoch [red] Survey (SES) were all taken with the UK Schmidt.
The "Second Epoch Survey" of the southern sky was made by the Anglo-Australian Observatory (AAO) with the UK Schmidt Telescope. Plates from this survey have been digitized and compressed by the ST ScI. The digitized images are copyright ? 1993-5 by the Anglo-Australian Observatory Board, and are distributed herein by agreement.
The "Equatorial Red Atlas" of the southern sky was made with the UK Schmidt Telescope. Plates from this survey have been digitized and compressed by the ST ScI. The digitized images are copyright ? 1992-5, jointly by the UK SERC/PPARC (Particle Physics and Astronomy Research Council, formerly Science and Engineering Research Council) and the Anglo-Australian Telescope Board, and are distributed herein by agreement.
The compressed files of the "Palomar Observatory - Space Telescope Science Institute Digital Sky Survey" of the northern sky, based on scans of the Second Palomar Sky Survey are copyright ? 1993-1995 by the California Institute of Technology and are distributed herein by agreement. The compressed files of the "Palomar Observatory - Space Telescope Science Institute Digital Sky Survey" of the northern sky, based on scans of the Second Palomar Sky Survey are copyright ? 1993-1995 by the California Institute of Technology and are distributed herein by agreement.