THE STAR FORMATION NEWSLETTER No. 266 (#36-40) 17 Apr. 2015

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1 THE STAR FORMATION NEWSLETTER No. 266 (#36-4) ( ) 17 Apr. 21

2 The Spatial Structure of Young Stellar Clousters. II. Total Young Stellar Populations M.I.A. Kuhn et al. MYStIX stellar population 2 MYStIX: Massive Young Star-forming complex Study in Infrared and X-ray Chandra X 2MASS,Spitzer IR (MPCM ) d<3.6 kpc Paper1 (cluster,isolated) scale threshold [Bressert+2] =>

3 log N [stars] (IMF) log N [stars] (XLF) XLF IMF stellar population => X RCW38

4 => Number of Stars Orion NGC2264 DR21 1 Flame Rosette RCW38 W4 1 Lagoon NGC RCW NGC2362 NGC637 1 Eagle 1 1 M Carina Trifid NGC log Surface Density [stars pc 2 ] Paper1 => 8-9% subcluster =

5 Gaia-ESO Survey: The analysis of pre-main sequence stellar spectra A.C. Lanzafame et al. Gaia-ESO Public Spectroscopy Survey VLT FRAMES ~ radial velocity 18 UVES GIRAFFE GIRAFFE: F~M PMS MS (12<V<9mag) UVES: G-K (9<V<1mag) SN on-going

6 Sulfur-Bearing Molecules in Massive Star-Forming Regions: Observations of OCS, CS, H2S and SO J. Li et al. S =>S chemical clock S warm gas CSO m 23GHz OCS,O13CS,13CS,H2S,SO, C18O 36 / HII ( )

7 CH3CN ( ) => : HII-HC, HII-only OCS =>τ~-16 LTE, Tex=K τ =>

8 (a) H 2 for H II HC (c) CS for H II HC (e) OCS for H II HC (g) H 2 S for H II HC (i) SO for H II HC ( ) ( ) Number of Sources (b) H 2 for H II only log (Column Density) [cm 2 ] (d) CS for H II only (f) OCS for H II only (h) H 2 S for H II only (j) SO for H II only S H2S (a) CS for H II HC (c) OCS for H II HC (e) H 2 S for H II HC (g) SO for H II HC (Table7) Number of Sources (b) CS for H II only log (abundance) (d) OCS for H II only (f) H 2 S for H II only (h) SO for H II only 9 8 OrionKL [Esplunges+214] [OCS]/[H2S], [CS]/[H2S], [SO]/[OCS], [CS]/[SO], [OCS]/[CS] HII-HC 7-8yr

9 Search for methylamine in high mass hot cores N.F.W. Ligterink et al. (CH3NH2) => non-detection UV [Garrod+8] CO ice (NH2CHO) JCMT UV or thermal interaction CO ice 23-26GHz 2~21 ~mk 9 Trot=12K

10 Source N S,CH3 NH 2 CH 3 NH 2 /NH 2 CHO CH 3 NH 2 /CH 3 OH NH 2 CHO/CH 3 OH NH 2 CHO upper /CH 3 OH cm 2 Model F E-2 3.1E-2 3.1E-2 Model M E-1 7.3E-2 7.3E-2 Model S E-1 1.E-1 1.E-1 AFGL 291 <1.9E <3.9E-1 - G24.78 <2.4E+16 <3.3E+1 <8.E-2 2.6E-3 9.E-4 G <.8E+16 <2.8E+1 <4.9E-2 1.8E-3 3.8E-3 G7.78 <3.E+16 <1.7E+2 <3.1E-1 1.8E-3 2.6E-2 IRAS <4.2E+16 <.E+1 <1.9E-1 3.8E-3 7.9E-3 IRAS <6.4E+16 - < NGC 738 IRS1 <2.E+16 <3.E+1 <1.8E-1 4.8E-3 2.1E-4 W3(H 2 O) <.E+16 <3.9E+1 <.E-2 1.3E-3 6.4E-4 W3(H 2 O)* <1.7E+16 <1.3E+1 <1.7E-2 1.3E-3 6.4E-4 W 33A <.7E+16 <2.7E+1 <2.9E-1 1.1E-2 4.6E-3 Sgr B2 a 1.2E+14.7E-1 1.7E-2 1.3E-2 Sgr B2(M) b 4.E E-2.2E-3 Sgr B2(N) b 6.E E-1 3.3E-2 7.8E-2 Sgr B2(N) c.e E-1 4.8E-2 Orion Compact Ridge d E-3 Garrod+8 Sgr B2 Orion CH3NH2/NH2CHO consistent CH3NH2/ CH3OH = CH3NH2 NH2CHO/CH3OH

11 (CH3CN) CH3*+CH*->CH3CN CH3NH2 CH3NH2/CH3CN CH3CN/CH3OH => CH3CN Source CH 3 NH 2 /CH 3 CN CH 3 CN/CH 3 OH Model F.E+1 6.3E-4 Model M 3.8E+1 2.6E-3 Model S 1.E+1 8.6E-3 AFGL 291 <.3 <7.E-2 G24.78 <.1E-1 2.1E-1 G <3.6.9E-2* G7.78 <1.9E+1 1.6E-2 IRAS < E-2* IRAS <4.3E+1.2E-2 NGC 738 IRS1 <2. 6.8E-2 W3(H 2 O) <7.2 7.E-3 W 33A < E-1 Sgr B2 a E-2 Sgr B2(N) b 3.E-1 1.1E-1 Sgr B2(M) b 2.E-1 6.7E-2 Sgr B2(N) c.9e+1 1.7E-2 Orion Compact Ridge d - 1.1E-2 s t a 6 W l u F ( p a Garrod+8 CH3NH2 NH2CHO CH3CN CH4 NH3 photodissociation CH3,NH2 overproduce & ALMA CH3NH2 =>W33A 1

12 A long-lasting quiescence phase of the eruptive variable V1118 Ori D. Lorenzetti et al. EXor V1118Ori (~8 ) V1118Ori NIR imaging 1.1m AZT24m Optical spectroscopy 8.4m LBT (R=) 3.6m TNG (R=7) NIR spectroscopy 3.6m TNG (R=) NIR J

13 Av=1~2 extinction raw =>Av additional component? [Lorenzetti+212]

14 ( optical) accretion driven cooling/heating