Radial a ia ions in ni ogen,
ca bon, and hyd ogen
ac iona ion in he PDS 70
plane -hos ing disk
Towa ds New F on ie s: The As ochemical Jou ney om Young
S ella Nu se ies o Exoplane s
Luna Rampinelli –ESO 2025
2° yea PhD s uden –Uni e si à degli S udi di Milano
Collabo a o s: Facchini S., Leemke M., And ews S., Bae
J., Benis y M., Cu one P., C idland A., Law C.J., Öbe g K.,
Po illa-Re elo B., Teague R.
ERC p ojec UNVEIL, G.A. no. 101076613
Mul iwa eleng h di ec de ec ion o wo o ming plane s in he la ge ca i y
As ochemis y in he PDS 70 disk as benchma k
1
Benis y+2021
Ha e +2019 Rampinelli+2024
Plane o ma ion shaping molecula emission in he PDS 70 disk
Chemical link be ween plane s and disk
Rampinelli+2024, Benis y+2021
2
Iso ope ac iona ion o HCN om high spa ial esolu ion ALMA obse a ions
Chemical link be ween plane s and disk
Rampinelli+2024, Benis y+2021
3
Chemical link be ween plane s and disk
Iso opic a ios as di ec ace s o ola iles his o y
Nomu a+2022
Zhang+2021, Gandhi+2023
Ba ado+2023
4
Chemical link be ween plane s and disk
Iso opic a ios as di ec ace s o ola iles his o y 5
Complex pic u e:
•Di e en en i onmen al condi ions
•Di e en molecula ace s
•Gas s ices
•Radial a ia ions in he same objec
Nomu a+2022
Iso opologue ac iona ion in disks
Radial a ia ions e eal local ac iona ion pa hways 6
Hily-Blan +2019, Nomu a+2023, Guzman+(in p ep.)
TW Hya V4046 Sg
Iso opologue ac iona ion in disks
Radial a ia ions e eal local ac iona ion pa hways 7
Hily-Blan +2019, Nomu a+2023, Guzman+(in p ep.)
Iso ope selec i e pho odissocia ion
TW Hya V4046 Sg
Ni ogen ac iona ion o HCN
Fo ma ion and ac iona ion o HCN depend on he UV ield 8
Visse +2018
HCN o med om UV-pumped H2
Radial p o ile o HCN/HC15N assuming a adially cons an 12C/13C = 69 15
Rampinelli+(subm.)
Iso ope ac iona ion o HCN in PDS 70
Assuming N(HCN) = 69 x N(H13CN)
HCN/HC15N in PDS 70
Rampinelli+(subm.), Hily-Blan +2019, Nomu a+2023
Dec easing 14N/15N p o ile o HCN beyond he dus ca i y 16
Visse +2018
HCN/HC15N in PDS 70
Dec easing end in he ou e disk: N2iso ope selec i e pho odissocia ion 17
P edic ion om
he mochemical
models o ypical
T Tau i disks
Visse +2018
HCN/HC15N in PDS 70
Dec easing end in he ou e disk: N2iso ope selec i e pho odissocia ion 18
Deu e a ion o HCN in PDS 70
Radial p o ile o N(DCN) by assuming Tex(DCN)=Tex(H13CN) 19
Rampinelli+(subm.)
Deu e a ion o HCN in PDS 70
Radial p o ile o N(DCN) consis en wi h N(H13CN) 20
Rampinelli+(subm.)
Deu e a ion o HCN in PDS 70
Deu e a ion and ni ogen ac iona ion p o iles do no co ela e 21
Rampinelli+(subm.)
Deu e a ion o HCN in PDS 70
22
Rampinelli+(subm.)
Iso ope selec i e
pho odissocia ion
Deu e a ion and ni ogen ac iona ion p o iles do no co ela e
Deu e a ion o HCN in PDS 70
23
Rampinelli+(subm.)
Gas phase iso ope
exchange eac ions
Deu e a ion and ni ogen ac iona ion p o iles do no co ela e
HCN/H13CN in PDS 70
24
Rampinelli+(subm.)
HCN column densi y is needed o ex ac he adial p o ile o 12C/13C
•Assump ion o adially
cons an 12C/13C has o be
e i ied
HCN/H13CN in PDS 70
LB obse a ions co e he hype ine bu hal o he main HCN componen 31
Double-Gaussian
i o ex ac he
hype ine lux
Rampinelli+(subm.)
HCN/H13CN in PDS 70
Ex ac HCN column densi y om he op ically hin hype ine componen 32
Rampinelli+(subm.)
HCN/H13CN consis en wi h ISM alue 33
HCN/H13CN in PDS 70
Rampinelli+(subm.)
HCN/H13CN consis en wi h ISM alue 34
Huge unce ain ies a
small and la ge adii
HCN/H13CN in PDS 70
Rampinelli+(subm.)
HCN/H13CN consis en wi h ISM alue 35
HCN/H13CN in PDS 70
Rampinelli+(subm.)
HCN ac iona ion in disks
Radial a ia ions e eal local ac iona ion p ocesses in disks 36
Rampinelli+(subm.)Hily-Blan +2019, Guzman+(in p ep.), Ca aldi+2021
HCN ac iona ion in as onomical objec s
HCN ac iona ion along imeline o s a and plane o ma ion 37
Rampinelli+
(subm.)
Conclusions
HCN ac iona ion in PDS 70:
1.Radial p o iles o HCN/H13CN, HCN/HC15N, and DCN/HCN
in he PDS 70 disk
2.PDS 70 esul s consis en wi h o he disks sugges ing
simila ac iona ion p ocesses in disks
3.Radial a ia ions o iso ope a ios e eal how
ac iona ion pa hways ac a di e en spa ial scales
38
Back-up
Ni ogen ac iona ion
•Low empe a u e iso ope exchange eac ions
•Iso ope selec i e pho odissocia ion
E icien sel -shielding o N2
Rampinelli+2024
Rampinelli+2024
