RCW 97
Coordinates: (327.304°, -0.552°)
[ Catalog | Explorer | SIMBAD ]
RCW 97 is the visible portion of a large star formation region most visible in infrared. Conti and Crowther include RCW 97 in their list of giant HII regions. It can be seen in this Spitzer infrared image.
Avedisova lists the ionising stars for RCW 97 and RCW 98 together in her 1984 paper (although she places these nebulae in separate star formation regions in her 2002 catalog). These include the O9.5 V star CP -54 6791 and 4 B-class stars. SIMBAD says that CP -54 6791 is the ionising star for RCW 98.
Avedisova places RCW 97 in star formation region SFR 327.04-0.54 with 16 components, including 4 masers.
The brightest portion of the infrared image is not far from the brightest visual region of the nebula as seen in hydrogen-alpha. According to Dutra and colleagues, the infrared cluster [DBS2003] 146 is deeply embedded in this infrared source at 3400 parsecs.
Dutra and colleagues place [DBS2003] 146 in their catalog of nebulae associated with "radio/infrared nebulae" rather than "optical nebulae", however from the position of the cluster it appears that this may be a mistake and in fact [DBS2003] 146 is associated with RCW 97.
Avedisova lists the ionising stars for RCW 97 and RCW 98 together in her 1984 paper (although she places these nebulae in separate star formation regions in her 2002 catalog). These include the O9.5 V star CP -54 6791 and 4 B-class stars. SIMBAD says that CP -54 6791 is the ionising star for RCW 98.
Avedisova places RCW 97 in star formation region SFR 327.04-0.54 with 16 components, including 4 masers.
The brightest portion of the infrared image is not far from the brightest visual region of the nebula as seen in hydrogen-alpha. According to Dutra and colleagues, the infrared cluster [DBS2003] 146 is deeply embedded in this infrared source at 3400 parsecs.
Dutra and colleagues place [DBS2003] 146 in their catalog of nebulae associated with "radio/infrared nebulae" rather than "optical nebulae", however from the position of the cluster it appears that this may be a mistake and in fact [DBS2003] 146 is associated with RCW 97.
This is considered to be a giant HII region.[1]
A 2009 study looks at the interaction between RCW 97 and the associated infrared dark cloud. [2]
A 2009 study looks at the interaction between RCW 97 and the associated infrared dark cloud. [2]
Notes
1. ^ Conti, Peter S. & Crowther, Paul A. (2004). "MSX mid-infrared imaging of massive star birth environments - II. Giant HII regions", Monthly Notices of the Royal Astronomical Society, Vol. 355, 899-917. [2004MNRAS.355..899C]
2. ^ Minier, V., André, Ph., Bergman, P., et al. (2009). "Evidence of triggered star formation in G327.3-0.6. Dust-continuum mapping of an infrared dark cloud with P-ArTéMiS", Astronomy and Astrophysics, Vol. 501, L1-L4. [2009A&A...501L...1M]
Distance estimates
3000 pc [2004MNRAS.355..899C]3200 pc +/- 400 [1989BAICz..40...42A]
2900 pc [2009A&A...501L...1M]
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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.
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.