1. 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

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

3. Line Identification IRS1 : CO, C 18 O 13 CO, CN, N 2 H +, CN, C 34 S, CCH, HCO + HCN, SO, SO 2, SiO, CH 3 OH IF : CO, 13 CO, CN, CCH, HCN, HCO + IF IRS1 T a (K)

5. Velocity-distribution maps of the 12 CO(2-1) gas Black contours: 12 CO(1-0) White contours: SO(2(3)-1(2)) 12 CO(2-1) moment0 map with:

6. 12 CO (1-0) and 13 CO (1-0) White contours: 13 CO (1-0)

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

8. Integrated (mean) intensities 12 CO(1-0) 12 CO(2-1) 13 CO(2-1)SO(2(3)-1(2)) [K km s -1 ] (T A * )270.086.4 (IF: 133, IRS: 282)42.54.63

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) Frequency (GHz) 113.123369113.144190113.170535113.191325113.488142113.49085 Tau2.55e-032.08e-022.03e-022.64e-022.65e-027.04e-02 Aul (s-1)1.29e-061.05e-055.14e-066.68e-066.73e-06 1.19e-05 Frequency (GHz)113.499643113.508934113.520421 Tau 2.09e-022.03e-022.55e-03 Aul (s-1) 1.06e-055.19e-061.30e-06 Frequency (GHz)89.188523267.557526 Tau 5.36e-012.15e-01 Aul (s-1) 4.16e-051.45e-03 Beam size > source size: don’t think of filling factor

10. 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) Frequency (GHz) 113.123369113.144190113.170535113.191325113.488142113.49085 Tau2.55e-032.08e-022.03e-022.64e-022.65e-027.04e-02 Aul (s-1)1.29e-061.05e-055.14e-066.68e-066.73e-06 1.19e-05 Frequency (GHz)113.499643113.508934113.520421 Tau 2.09e-022.03e-022.55e-03 Aul (s-1) 1.06e-055.19e-061.30e-06 Frequency (GHz)89.188523267.557526 Tau 5.36e-012.15e-01 Aul (s-1) 4.16e-051.45e-03

11. 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) Frequency (GHz)87.31692587.32862487.40200487.407165 Tau1.25e-016.24e-026.25e-022.51e-02 Aul (s-1) 1.65e-061.37e-061.38e-061.66e-06 Frequency (GHz)88.63041688.631847 88.633936 Tau1.15e-011.92e-013.85e-02 Aul (s-1)2.43e-05 Frequency (GHz)110.201354 Tau1.70e-01 Aul (s-1)6.33e-08

12. 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) Frequency (GHz) 113.123369113.144190113.170535113.191325113.488142113.49085 Tau1.29e-061.05e-051.48e-021.93e-02 5.11e-02 Aul (s-1)1.29e-061.05e-055.14e-066.68e-066.73e-06 1.19e-05 Frequency (GHz)113.499643113.508934113.520421 Tau1.52e-02 1.49e-021.86e-03 Aul (s-1) 1.06e-055.19e-061.30e-06 Frequency (GHz)89.188523 Tau 3.44e-01 Aul (s-1) 4.16e-05

15. 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 C 2 H is more abundant in the IF Gracias!