BRC Proposal
Instructions
Background on Star Formation
Luisa's tutorial on star formation from cool cosmos
Notes from a U of Oregon lecture on star formation ... not as good as Luisa's lecture notes but a good launching point ... http://abyss.uoregon.edu/~js/ast122/lectures/lec13.html
A more detailed explanation of Star Formation from a textbook. There's more math here than we'll need. File:SF.pdf --CJohnson 11:05, 1 February 2011 (PST)
Target Selection
The list of sources that Lori suggests we consider are here:
- brc34 21h32m51.2s +58d08m43s
- brc36 21h35m32.6s +57d31m50s
- brc38 21h40m02.2s +58d20m31s
- brc31 20h50m43.4s +44d21m53s
- brc27 07h04m07.8s -11d16m43s
Let's collect information on literature references for each of these below. Look in both ADS and SIMBAD for papers and previously known sources within about 30' of these positions.
--- From Marcella
BRC 34 1 proposal to study by Garmire, nothing on SIMBAD
BRC 36 3 articles on ADS two are on star formation but none on SIMBAD
BRC 38 1 article by Choudhury which identified 45 YSO's
BRC 31 nothing on both
BRC 27 Chauhan observed BR 27 and came up with some YSO candidates and a catalog(?) entry on SIMBAD.
--- From John:
Ogura. "Triggered Star Formation associated with HII Regions." File:Http://74.125.155.132/scholar?q=cache:aOoo5uLiRrIJ:scholar.google.com/+brc+27+sfo+27&hl=en&as sdt=0,5. ASI Conference Series. 2010, Vol. 1, pp 19–25.
Ogura, Sugitani and Pickles. "H-alpha Emission Stars and Herbig-Haro Objects in the Vicinity of Bright-Rimmed Clouds." Media:http://iopscience.iop.org/1538-3881/123/5/2597/pdf/1538-3881_123_5_2597.pdf AJ. 123: 2597-2626, 2002 May.
Morgan, et al. "A Radio and Mid-Infrared Survey of Northern Bright-Rimmed Clouds." Media:http://arxiv.org/PS_cache/astro-ph/pdf/0407/0407167v1.pdf astro-ph 0407167v1.
Soares and Bica. "The Embedded Star Clusters in the Nebulae NGC 2327 and BRC 27 in Canis Majoris R1." [[Media:http://cds.aanda.org/index.php?Itemid=129&option=com_article&access=bibcode&bibcode=2002A%25252526A...388..172S]] A&A. 388, 172{178 (2002).
--- From Diane
BRC27
07h04m07.8s
-11d16m43s
ADS: Chauhan; Simbad: 14 entries (I checked them, not all seem to be on this exact area)
Images: the Aladdin Sky Atlas (DSS2 & Simbad) shows the image fairly bright where the B & W is dark. Kicking in the IRAS data only makes 5 IR targets show up, plus the cloud near the bottom of the image.
Where are all the targets & YSOs that are mentioned by Chauhan? Chauhan abstract (2009) “Triggered star formation and evolution of T-Tauri stars in and around bright-rimmed clouds.” From Chauhan’s data tables 4 & 6 I gleaned the following nuggets of information: table4.dat 85 133 Dereddened magnitude, colors, age and mass of the YSOs associated with the BRCs; Last entry from table 4 and Table 6 each say this: Cl II YSO class (meta.code.class) (CLASS_CODE)
Coordinates for this cloud come up as: 07 03 58.7 -11 23 19 IRAS 07016-1118 slightly south and to the right of the main image of BRC27
From data Table 6: IRAC photometric magnitudes of the disk bearing candidates in BRCs 2, 27 and 13/14 (are we interested in examining this?)
BRC31
20h50m43.4s
+44d21m53s
Busy field; Cloud in center of Aladin Applet image.(right on these coordinates) surrounded by Emission line stars, HH, and radio sources, and an X-ray source. The frame completely fills up when 2MASS is applied.
DSS2 shows a thick cloud. Simbad shows the sources described above.
BRC34
21h32m51.2s
+58d08m43s
0 ADS abstracts; 0 Simbad citations No object listed at (or near) these precise coordinates, however, AllSky Optical images reveal the clouds that were of interest to Lori. Parts of the cloud are labeled. The DSS2.POSSII image reveals 2 star clusters, a Cloud Dark Nebula, and 2 IR sources (one above & slightly to the right of the center of the image) Many hits on 2MASS
BRC36
21h35m32.6s
+57d31m50s
3 results from ADS: 1 abstract, 2 Chandra proposals; 0 results from Simbad, however, Aladin applet Simbad identifies (and IRAS-IRIS reveals) 6 YSO’s, 10 IR sources, 2 Mol Cld, Rf Neb, Br Neb, Dk Neb, stars in nebulae, and stars in clouds.
This looks like an interesting field. Lots going on (too much?) ADS: Garmire and Getman are both proposing to use Chandra to study this area. (x-rays)
BRC38 (is this SFO 38?)
21h40m02.2s
+58d20m31s
Triggered Star Formation and Young Stellar Population in Bright-rimmed Cloud SFO 38 by Choudhury, Rumpa; Mookerjea, Bhaswati; Bhatt, H. C.
They have identified 45 YSO’s in this area, although I only counted 19 in the image I was able to pull up. They studied the area with a variety of instruments and wavelengths (including Spitzer). This seems like a fairly comprehensive study.
--- This is a fabulous start, Team BRC. Pats on the back to all :) --CJohnson 18:16, 6 February 2011 (PST)
