Sh 2-270
Coordinates: (196.84°, -3.11°)
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This bipolar nebula contains an infrared star cluster (IRAS 06073+1249) embedded in a 1000 solar mass molecular cloud and may be ionised by a B0.5 V class star. There are a wide range of distance estimates available for this object. Some estimates place it in the Perseus arm, and others closer to the Outer arm.
For more information on this region, including detailed references, see the Sh 2-266 to Sh 2-272 section of the description of the Orion (200° - 190°) sector of the Commentary on the Galactic Plane.
For more information on this region, including detailed references, see the Sh 2-266 to Sh 2-272 section of the description of the Orion (200° - 190°) sector of the Commentary on the Galactic Plane.
Carpenter and his colleagues find that Sh 2-270 contains an infrared star cluster (IRAS 06073+1249) embedded in a 1000 solar mass molecular cloud. [1]
Neckel and Staude state that Sh 2-270 is a bipolar nebula [NS84] 8 and that the best explanation for the radio, visual and infrared emission from this direction would be for a nebula located at a distance of 2100 pc and ionised by a B0.5V class star. [2]
Avedisova places the nebula in star formation region 96.84-3.11 with 14 components, including a water maser and the infrared source IRAS 06080+1233.
Neckel and Staude state that Sh 2-270 is a bipolar nebula [NS84] 8 and that the best explanation for the radio, visual and infrared emission from this direction would be for a nebula located at a distance of 2100 pc and ionised by a B0.5V class star. [2]
Avedisova places the nebula in star formation region 96.84-3.11 with 14 components, including a water maser and the infrared source IRAS 06080+1233.
Notes
1. ^ Carpenter, John M., Snell, Ronald L., Schloerb, F. P., et al. (1993). "Embedded star clusters associated with luminous IRAS point sources", The Astrophysical Journal, Vol. 407, 657-679. [1993ApJ...407..657C]
2. ^ Neckel, T. & Staude, H. J. (1984). "A survey of bipolar and cometary nebulae - Photographic and photometric observations", Astronomy and Astrophysics, Vol. 131, 200-209. [1984A&A...131..200N]
Distance estimates
6800 pc [2003A&A...397..133R]4800 pc [1993ApJ...407..657C]
2100 pc [1984A&A...131..200N]
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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.
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