The Gum Catalog
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[ 1 | 11 | 21 | 31 | 41 | 51 | 61 | 71 | 81 ]Gum 81a
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The Gum catalog splits M17 into a main part (Gum 81a) and a smaller portion (Gum 81b), divided by a dust lane.
Gum 81b
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The Gum catalog splits M17 into a main part (Gum 81a) and a smaller portion (Gum 81b), divided by a dust lane.
Gum 82
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Avedisova places it in star formation region SFR 16.65-0.34 along with the molecular clouds SYCSW 164, SYCSW 164A and SRBY 52. She concludes that Sh 2-48 is ionised by the O8 V multiple star ADS 11285.
The newly discovered dense star cluster Kronberger 25 appears in the same direction as Sh 2-48, although a tentative distance estimate for this cluster of about 2000 parsecs suggests that it may be a foreground object.
Gum 83
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There is a much better image of the Eagle nebula here. A region of M 16 was the subject of perhaps the most famous Hubble space telescope image, the 1995 Pillars of Creation.
Gum 84
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Ser OB2 contains over 100 OB stars with a common age of about 5 million years.
A good image of this nebula, which looks like a nest (Gum 84) carrying a tiny egg (Gum 85), can be seen here.
Gum 85
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According to Marsalkova, RCW 167 = Sh 2-54 = Gum 84-85, however Gum states that Gum 85 "Almost lies within [Gum] 84 but this is probably a case of alignment ... They are probably separate objects."
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Colin Gum, working at Australia's Mount Stromlo observatory in 1951, completed the first major survey of HII regions visible in the southern hemisphere. He published his nebula catalog in 1955. Although Gum's catalog was largely superceded by the RCW catalog published in 1960, many HII regions are still referenced by their Gum numbers even today, so these pages provide an easy reference with cross references to the RCW and Sharpless catalogs.
Most of the images used to illustrate the Gum catalog were created using the
SuperCOSMOS Sky Survey, with red = hydrogen-alpha,
blue = UKST Blue and green = UKST Infrared. Because green represents infrared, the images are not quite
the same as would be seen at purely visual frequencies. Green in these images usually reveals warm dust or red giant stars.
These images were created using the POSS-II/UKSTU data of the
Digitized Sky Survey and
SuperCOSMOS
using the process described here.
According to my correspondence with the Royal Observatory Edinburgh and the Space Telescope Science Institute,
I am allowed to use the POSS-II/UKSTU data to
create and display images for non-commercial purposes
so long as I include this fine print for the SuperCOSMOS data:
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.