S eame s and winds:
shaping he chemis y o p o os ella disks
Linda Podio — INAF - Osse a o io As o isico di A ce i
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
ALMA p o ided e idence o plane o ma ion in disks wi h ages o 105 y
Class 0 and I disks a e massi e enough
o o m plane s
Tychoniec e al. 2020
Rings and gaps in
young disks (Class I) mm- dus g ains in he
en elope & disk o Class I
Kwon e al. 2009
Mio ello e al. 2014
Galame z e al. 2019
Plane s o m in p o os ella disks
Sheehan e al. 2018
Segu a-Cox e al. 2020
Mau ei a e al. 2024
GY 91 - Class I
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
Wha a e he e ec s o he acc e ion/ejec ion
ac i i y on he disk e olu ion in e ms o
mass ese oi , g ain g ow h, disk s abili y,
and chemical composi ion ?
P o os ella disks physical and chemical s uc u e may be a ec ed by se e al p ocesses
-high (acc e ion) luminosi y may push snowlines ou wa ds
-acc e ion s eame s channeling ma e ial om he la ge scale en elope o he disk
-disk winds emo ing mass and angula momen um om he disk
P o os ella disks
is he chemical composi ion o
young p o os ella disks inhe i ed
by he o ming plane s ?
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
Wha a e he e ec s o he acc e ion/ejec ion
ac i i y on he disk e olu ion in e ms o
mass ese oi , g ain g ow h, disk s abili y,
and chemical composi ion ?
P o os ella disks physical and chemical s uc u e may be a ec ed by se e al p ocesses
-high (acc e ion) luminosi y may push snowlines ou wa ds
-acc e ion s eame s channeling ma e ial om he la ge scale en elope o he disk
-disk winds emo ing mass and angula momen um om he disk
P o os ella disks
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
Acc e ion luminosi y may push snowines ou wa ds
Adap ed om Tobin e al. 2023
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
P o os ella disks a e wa m
molecula emission esol ed e ically in edge-on disk
allow a di ec es ima e o he snowline posi ion
an’ Ho e al. 2020
Podio e al. 2020
In Class I disk he molecula snowlines a e loca ed u he
han in Class II disks, e.g.:
RCO ~ 100 au in IRAS04302 and RCO ~ 20 au in TW Hya
H2CO
CO
Talk by
R. Le Gal
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
P o os ella disks a e wa m
Class 0 disk HH 212: Lee e al. 2022
The adial and e ical s a i ica ion o molecula emission in hen disk o HH 212:
CH3OH (Te p~100 K) p obe a mo e ex ended egion (ou o R~40 au, and z~50 au) han
NH2CHO (Te p ~ 230 K) (ex ends ou o R~30 au, and z~35 au)
CH3OH
NH2CHO
Cecca elli e al. PPVII
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
P o os ella ou bu s ing disks
Tobin e al. Na u e 2023
Lee, Jeong-Eun e al. Na u e2019
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
implica ions on he disk e olu ion in e ms o
inal mass budge and chemical composi ion
Inc easing obse a ional e idences ha :
- disks do no o m in isola ed sphe ical collapsing co es
- episodic and non axisymme ic acc e ion on o he disk (acc e ion s eame s)
Acc e ion s eame s
Pineda e al. 2023, PPVII
See also
Lucy E ans e al. 2025
POSTER
Talk by
M. T. Valdi ia Mena
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
Acc e ion s eame & disk chemis y
The eac ion CH3+ + HD is exo he mic
D2CO and HDCO may o m in gas- phase a
T< 50 - 70 K
H2CO HDCO
abs ac ion eac ions on g ains a ou he
o ma ion o DCO/D2CO
high abundance o D2CO (w HDCO & H2CO)
on g ains and elease in he acc e ion shock
Be gman e al. 2011
Hidaka e al. 2009
Taque e al. 2012
Aikawa e al. 2012
Podio e al. 2024
The supe deu e a ion (D2CO/HDCO ~30%-70%) in IRS63 disk is due o g ain chemis y
he acc e ion shock e eals he chemis y o ices in he disk se a he p es ella s age o in he disk midplane
Roue e al. 2007, 2013,
Robe s & Milla 2007
CHD2+
CH3D2+
CHD2
D2CO
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
Winds emo e mass and angula momen um
~0.02” / 8 AU
~ 250 AU
SiO 5-4
Lee+ Science 2017a
SiO 8-7
Lee+ Na u e 2017b
De Simone e al. 2024
Naza i e al. 2024
IRAS4A2
L1448
HH 212
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
A collima ed SiO je o igina ing om ac ions o au (Lee e al. 2017)
he Disk-wind p obed by SO2 om 0.1-40 au disk egion (Tabone e al. 2017)
and he o a ing ou low ca i ies (Codella e al. 2014)
Rlaunch ~ 0.1 - 40 au
~ 250 AU
SiO 8-7
Rlaunch ~ 0.05 - 0.3 au
Lee e al. 2017
Tabone e al. 2017
Lee e al. 2018
Ohashi & FAUST 2022
Codella e al. 2014
HH 212
O ion
d = 450 pc
VLA 1623-2417
Ophiucus A
d = 131 pc
Winds emo e mass and angula momen um
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
implica ions on he disk e olu ion in e ms o dus g ow hs & dus mixing and chemical composi ion
Disk winds can also ex ac la ge g ains om he inne disk.
These may be anspo ed in he en elope by he wind and la e all back in he ou e disk (ASH-FALL)
Tsukamo o, Machida
e al. 2021
Winds anspo o dus g ains om disks o en elopes ?
Models o anspo can jus i y
>100 g ains a ypical Class
0/I mass loss a es
Giacalone e al. 2019
μm
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
la ge g ains
Lowe , hence la ge g ains, a e associa ed wi h la ge mass acc e ion a es
β
Cacciapuo i e al. 2024
la ge mass loss a e o he je /ou low
Galame z e al. 2019
dus emissi i y index β:
a p oxy o he g ain size
in he en elope (70-700 au)
Winds anspo o dus g ains om disks o en elopes ?
Podio e al. 2021
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
The ash all scena io may explain
- Dus mixing in disk —> may explain simila i y o chond ules (ou e SS) and CAI (inne SS) (e.g. Hellmann+23)
- Replenishmen o he ou e disk wi h la ge g ains as solu ion o me e -ba ie (e.g. Weidenschilling+1977)
JWST i s e idence o li ing o g ains >10
in a Class II YSO, wi h much weake
μm
·
M
P o os ella chimneys ?
Duchene e al. 2023
0.4 M☉ young s a in Tau us
2MASS J04202144+2813491
Saba ini & FAUST, subSaba ini & FAUST 2024
ALMA i s e idence o la ge g ains (be a <1) along he
ou low ca i y walls o p o os ella sou ces
Talks by
G. Saba ini
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
is he chemical composi ion o
young p o os ella disks inhe i ed
by he o ming plane s ?
Linking he chemis y o disks & SS ossils
Lippi e al. 2021
iCOMs abundance a ios
Deu e a ion
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
Tes ing he “inhe i ance”: iCOMs abundance a ios
iCOMs abundance a ios in Class 0 (104 y ) and I (105 y ) p o os a s and in come s
D ozdo skaya+ 2019 (IRAS 16293) Bianchi+ 2019 Me cimek+ 2022
Class 0: ALMA-PILS IRAS
16293 (Jo gensen e al. 2016)
Come s: 67P/C-G (Rubin e al.
2019)
Class 0 Class ICome s
Class 0: Jo gensen e al. 2016, 2018, Manigand
e al. 2020, Belloche e al. 2020, Yang e al.
2021; Class I: Be gne e al. 2019, Bianchi e al.
2020, Come s: Le Roy e al. 2015
?
?
Class 0: Taque + 2015, Lopez-Sepulc e+ 2017,
Jabe + 2014, Jo gensen e al. 2016, 2018,
Codella+ 2018; Class I: Obe g e al. 2014,
G aninge e al. 2016, Be gne e al. 2019,
Come s: Le Roy e al. 2015
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
HD 100546
Class II
CH3OH/H2CO in disks a y
wi h adial dis ance
CH3OH/H2CO in DISKS
HOT CORINOS
DISK-AVERAGED
DISKS
COMETS
(Lippi e al. 2021)
HD 100546
CH3OH/H2CO in COMETS
Tes ing he “inhe i ance”: [CH3OH/H2CO]
Boo h e al. 2021, 2023
Podio e al. 2020a, Ga u i e al. 2021
Class II DISKS Walsh+ 2016, Ca ney+ 2017, 2019, Boo h+ 2021
HOT-CORINOS Taque + 2015, Jø gensen+ 2018, Pe sson+
2018, Manigand+ 2020
COMETS Bi e + 2015, Rubin+ 2019
Lippi e al. 2021, 2024
CH3OH/H2CO in come s
CH3OH/H2CO in come s a y
wi h heliocen ic dis ance
67P C-G may no be ep esen a i e
o come a y chemis y
Lippi e al. 2024
mm obs: Bi e e al.
NIR obs: Lippi e al. 2021
Rosina: Rubin e al.
Towa ds New F on ie s: he as ochemical jou ney om young s ella nu se ies o exoplane s
CH3OH/H2CO: disks e sus come s
inne disks abundance a ios in ag eemen wi h p o os ella and come a y alues
Class 0 ho co inos
Inne disk egion
disk-a e aged
67P/C-G
Rh<1
Rh>1
Hype bolic
Long P Jupi e amily
disks a e aged alues may be biased by he low CH3OH abundance in he ou e disk
come 67P/C-G may no be ep esen a i e o he come a y popula ion
Lippi e al. 2024
POSTER by
L. E ans
