1.3mm con inuum
โ
โ
5au
Lizxand a Flo es-Ri e a
yea olume jou nal
2025 693 A&A
1.1M 3
UV_p ocessing_icy_pebbles_&_dynamics_ou e _disk
ice des uc ion ime
by pho odissocia ion UV ield [pho ons cm-2 s-1]
<1 y s
>106 y s
COice H2Oice
all 1mm
non-p ocessed non-p ocessed
all 1mm
p ocessed p ocessed
100 ๐m:
16.7%
100 ๐m:
4.3%
100 ๐m:
3.8%
100 ๐m:
17.2%
20 AU
80 AU
Whe e is he
dus
concen a ed?
simula ion
Syn he ic
In his p ojec , we s udied how dus pa icles can lose hei icy composi ion when hey a e li ed
o he UV laye (Z/R=0.2) by u bulence. #VSI #disks #chemis y #dynamics
Commen s
Me hods
We use he PLUTO code o analyze he gas+dus dynamics, and RADMC3D o gene a e he UV ield.
Resul s
We ind ha a small ac ion o 100 ฮผm pa icles a e equen ly li ed up o Z/R = 0.2, esul ing in a loss o
hei icy composi ion as he esidence ime in his laye allows e ec i e CO and wa e pho odissocia ion.
Conclusion
The acc e ion and d i ing o p is ine icy pebbles can explain ISM-like signa u es in me eo i es and come s.
1K
5K
3K
>109<103
1mm
100๐m
โLa ge pa icles a e able
o g ow h ough s icking
collisions in egions o
high pa icle
concen a ion.
โThis a ec s he
maximum g ain sizes
al eady seen in
sub-(mm) ALMA
obse a ions.
ALMA band 6
(high pa icle concen a ion)
(lowe pa icle concen a ion)
S a Plan, Globe ins i u e, Uni e si y o Copenhagen in Denma k
h ps://gi hub.com/liza l
Flo es-Ri e a, Mange , e al in P ep.
Pos doc
1
I he ime pa icles spend abo e he Z/R=0.2 (UV laye ) is g ea e han he ice
des uc ion imescale o ola iles, hen pa icles will be p ocessed.
