AraOB1 Background Info Page

Some notes on the AraOB1 region, references to previous studies etc.

Click here for the survey progress page.

On this page:
MSX maps
13CO maps
13CO spectra
Arnal et al (12CO) comparison
Yamaguchi et al (13CO) comparison
General Comments
Literature
Miscellaneous

MSX A (8um) map

MSX E (21um) map - same FoV as previous image.
The two MSX E sources of interest are the point sources at (336.55,-1.81) and (336.53,-1.74) (i.e. below the bright red blob).
Integrated 13CO map, overlaid with MSX A contours (red)

Integrated 13CO map, overlaid with MSX E contours (red)
Close-up integrated 13CO map, overlaid with MSX A (red) + E (black) contours
Integrated 13CO - profile positions (see below)
13CO spectra - cuts 1 to 9








13CO spectra coincident with 2 MSX E sources
a) southern source b) northern source


Integrated 13CO + Arnal's 12CO Peaks (green crosses)
Integrated 13CO + Arnal's IRAS YSO candidates (green crosses)
IRAS point sources that fulfil Arnal et al's YSO criteria and are spatially coincident with their molecular clouds.

Integrated 13CO + Yamaguchi's 13CO Peaks (green crosses)
Integrated 13CO + Yamaguchi's IRAS YSO candidates (green crosses) IRAS point sources that fulfil Yamaghuchi et al's YSO criteria and are spatially coincident with their molecular clouds.

General Comments

Most previous studies have focussed on the star-forming activity in i) RCW108/NGC6193 or ii) the embedded cluster SFO79/RCW108-IR/IRAS16362-4845. With the exception of Arnal et al. (2003, 1987) and Rizzo and Bajaja (1994), there has been little discussion of the extended molecular gas distribution in Ara, or about the relationship between the molecular/atomic/ionized gas phases in this region. A bibliographic reference and one-line summary of previous observational studies is listed below (in chronological order).

No masers.

CO emission confined to velocity range [-23,-13] km/s. There is a general velocity gradient across the cloud: the SW is at more positive velocities than the NE. But there is significant emission across this whole velocity range in the NE region.

Literature

  • Comeron et al. (2005) - CO(2-1), 13CO, JHK, UBVRI, Halpha obs. near NGC6193 & RCW108-IR. Discusses SF scenario
  • Skinner et al. (2005) - Xray obs of NGC6193, focusses on O stars
  • Sollins and Megeath (2004) - C180, HC3N obs of RCW108 (small FoV).
  • Thompson et al. (2004) - 3/6, 13/20cm RC study of southern BRCs (inc. RCW108).
  • Urquhart et al. (2004) - RC, RRL, 12CO, 13CO, C18O obs. of SFO79 (+2MASS + MSX).
  • Arnal et al. (2003) - low res. 12CO obs. of Ara.
  • Vilas-Boas et al (2000) - single pointing NH3(1,1) obs of RCW108.
  • Waldhausen et al. (1999) - multicolor polarisation study of stars in Ara
  • Yamaguchi et al. (1999) - 13CO obs of southern molecular clouds near BRCs (inc. RCW 108)
  • Bronfman et al. (1996) - CS(2-1) single pointing of RCW108 (no detection).
  • Rizzo & Bajaja (1994) - Another theory for how HI bubbles are related to SF in Ara.
  • Sugitani & Ogura (1994) - HII regions and IRAS sources near BRCs
  • Ghosh et al. (1989) - 120-300um fluxes of RCW108-IR
  • Cerosismo (1990) - RRL and 20cm RC obs of Gal. Plane near l=330-340deg
  • Persi (1990) - JHKLM + IRAS fluxes of RCW108-IR
  • Arnal et al. (1987) - HI obs of Ara + theory for how SF is propagating in Ara
  • Kuiper et al. (1987) - Method to estimate dust temperature based on IRAS 60/100um flux for southern dark clouds.
  • Straw et al. (1987) - IR (1.2 - 100um) obs. of RCW108-IR
  • Phillips et al. (1986) - CO(2-1) low res mapping of RCW108/NGC6193
  • Whiteoak & Gardner (1985) - NaI absorption study towards Ara
  • Gardner & Whiteoak (1984) - H2CO absorption study towards southern sources (inc. Ara).
  • Brand et al. (1984) - CO(2-1) single pointing of southern SF regions (inc. RCW108)
Misc Surveys, Online data etc.

  • Kharchenko et al. (2005) - Open Cluster Atlas (updated info re. NGC6193, NGC6167)
  • Parker et al (2005) - Supercosmos Halpha survey (data online)
  • Dutra et al (2003) - New 2MASS clusters in southern MW (data online)
  • Dutra et al (2002) - Dust Cloud catalogue (data online)
  • Spitzer TOs of RCW108 and NGC 6193 are online April/May 2006
  • SWAS spectra of 0.2 x 0.2 deg area around RCW108 available now (CI, CO, H2O)
Last modified 10 July 2006