Difference between revisions of "Talk:CG4 Spring work"

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CG4 might have been a shade for Sa101 to hide behind.  Until the  
 
CG4 might have been a shade for Sa101 to hide behind.  Until the  
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*''I agree with this''
 
*''I agree with this''
 +
 +
    found seven new YSOs in the area
 +
    confirmed one previous YSO
 +
    found there are different ages (spectra and movement away from globule)
 +
    Found late-type premain sequence stars
 +
  
 
*''I disagree with this''
 
*''I disagree with this''
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         probably continuous (from 8 stars?)
 
         probably continuous (from 8 stars?)
 
          
 
          
    Found late-type premain sequence stars
 
  
 
*''Why we should care''
 
*''Why we should care''
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     found seven new YSOs in the area
 
     found seven new YSOs in the area
 
     confirmed one previous YSO
 
     confirmed one previous YSO
 
+
    Used some of the same techniques we will
 +
    Found YSOs and confirmed previous ones
 +
    Found faint background stars getting more prominent in longer wavelength filters
 +
    Not all CG had star formation but CG4 was one that did have it
  
  

Revision as of 21:59, 14 April 2010

For Apr 14:

   * KEVIN -- Reipurth and Pettersson 1993  
    http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1993A%26A...267..439R&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf 
  • Main Point
   Looked for YSOs in Gum Nebula (near CG4 and Sa101 and CG13)
   Used
       JHK IR photometry (sort of like us)  ESO 1m        J-H and H-K
       UBV photometry (like us)             ESO 1m
       Ha spectroscopy                      CTIO 60/90cm Curtis Schmidt telescope with 6deg prism    1-2hrs
       Point source spectroscopy            ESO 1.52m and 3.6m        3700A to 7000A                    10-40 min


Quesitons and Kevin trying to dodge the questions

   TiO and MgH
       using the width and 
   Ha 
       width of line (spinning?)

   Balmer series
   forbidden [OI] linesat 6300 and 6363A
   prominent absorption at 5577A
   absorbtion trough at 6200A deeper
        
  • High Level Summary
  • Most Interesting

Introduction:

   Good description of cometary nebulae
   Good rundown of CG formation theory
       OB starformed nearby and the UV radiation scrunched and eroded nearby nebula (some evidence in this paper for this method)
       or SN went off nearby and shockwave scrunched and eroded nearby nebula


CG4 might have been a shade for Sa101 to hide behind. Until the CG4 evaporation may have started >1,000,000 years ago. In faint background stars they found stars becoming more prominent as they used longer wavelength filters (good for us)


Spectral class

   M3 to K7
       M2, M3-4, K7-M0, K7, K2-5, K5, M1-2, K2

   

  • I agree with this
   found seven new YSOs in the area
   confirmed one previous YSO
   found there are different ages (spectra and movement away from globule) 
   Found late-type premain sequence stars


  • I disagree with this
   found there are different ages (spectra and movement away from globule) 
       probably continuous (from 8 stars?)
       
  • Why we should care
   found seven new YSOs in the area
   confirmed one previous YSO
   Used some of the same techniques we will
   Found YSOs and confirmed previous ones
   Found faint background stars getting more prominent in longer wavelength filters
   Not all CG had star formation but CG4 was one that did have it


For Apr 21:

   *VIVIAN -- Kim et al 2003 http://adsabs.harvard.edu/abs/2003csss...12..799K 
    Full Paper link click here. [1]
  • Main Point
  • High Level Summary
  • Most Interesting
  • I agree with this
  • I disagree with this
  • Why we should care


For Apr 28:

   *CHELEN -- Kim 2005 
   http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?2003ASPC..287..275K&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf
  • Main Point
  • High Level Summary
  • Most Interesting
  • I agree with this
  • I disagree with this
  • Why we should care


For May 5:

   *CAROLYN -- Choudhury and Bhatt 2008  
   http://arxiv.org/PS_cache/arxiv/pdf/0811/0811.4389v1.pdf  
   the ADS entry is http://adsabs.harvard.edu/abs/2009MNRAS.393..959C 
   and I downloaded the real journal article for you (easier to read!) here: media:choud.pdf
  • Main Point
  • High Level Summary
  • Most Interesting
  • I agree with this
  • I disagree with this
  • Why we should care