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S 140 PDR reagions and hot cores

S 140 PDR reagions and hot cores. Group 1: Yunhee Choi, Juan Luis Verbena, Evgenia Koumpia, Karen Olsen, Sara Cuadrado, Gustavo Orellana Under supervision: Asunción Fuente, Christof Buchbender. After baselining and off-position correction:. Off-position minus 2 nd off-position spectrum:.

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S 140 PDR reagions and hot cores

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  1. S 140 PDR reagions and hotcores Group 1: Yunhee Choi, Juan Luis Verbena, Evgenia Koumpia, Karen Olsen, Sara Cuadrado, Gustavo Orellana Under supervision: Asunción Fuente, Christof Buchbender

  2. After baselining and off-position correction: Off-position minus 2nd off-position spectrum: + =

  3. IRS1 : CO, C18O 13CO, CN, N2H+, CN, C34S, CCH, HCO+ HCN, SO, SO2, SiO, CH3OH IF : CO, 13CO, CN, CCH, HCN, HCO+ Line Identification Ta (K) IRS1 Ta (K) IF

  4. Velocity-distributionmaps of the12CO(2-1) gas 12CO(2-1) moment0 map with: Black contours: 12CO(1-0) White contours: SO(2(3)-1(2))

  5. 12CO (1-0) and 13CO (1-0) White contours: 13CO (1-0)

  6. SO (2(3)-1(2)) v=0

  7. Integrated (mean) intensities

  8. Specie: CN Excitation temp: 100 (K) Colum density: 1.5e15 (part/cm^2) Specie: CHO+ Excitation temp: 100 (K) Colum density: 0.85e15 (part/cm^2) Beam size > source size: don’t think of filling factor

  9. Specie: CN Excitation temp: 100 (K) Colum density: 1.5e15 (part/cm^2) Specie: CHO+ Excitation temp: 100 (K) Colum density: 0.85e15 (part/cm^2)

  10. Specie: CCH Excitation temp: 10 (K) Colum density: 1.5e14 (part/cm^2) Specie: HCN Excitation temp: 10 (K) Colum density: 1.2e13 (part/cm^2) Specie: 13CO Excitation temp: 10 (K) Colum density: 3.0e15 (part/cm^2)

  11. Specie: CN Excitation temp: 10 (K) Colum density: 1.5e13 (part/cm^2) • Specie: CHO+ Excitation temp: 100 (K) Colum density: 0.85e15 (part/cm^2) • *Hydrogen column density IRS1: 2.5e23 (part/cm^2) • IF : 3e21 (part/cm^2)

  12. Conclusions • Chemistry in IRS1 more similar to a hot core • Distinct velocities of ionization front and hot core • CN/HCN ratio is similar in the two positions, probably because of the large beam • C2H is more abundant in the IF Gracias!

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