EXPERIMENTAL STUDY ON BOUNCING BARRIERS IN PROTOPLANETARY DISKS
EXPERIMENTAL STUDY ON BOUNCING BARRIERS IN PROTOPLANETARY DISKS
复制标题
原行星盘中弹跳势垒的实验研究
DOI:
10.1088/0004-637x/783/2/111
复制
发表时间:
2014
期刊:
影响因子:
--
通讯作者:
M. Köster
中科院分区:
文献类型:
--
作者:
T. Kelling;G. Wurm;M. Köster
For dust aggregates in protoplanetary disks, a transition between sticking and bouncing in individual collisions at mm to cm sizes has been observed in the past. This leads to the notion of a bouncing barrier for which growth gets stalled. Here, we present long-term laboratory experiments on the outcome of repeated aggregate collisions at the bouncing barrier. About 100 SiO 2 dust aggregates 1 mm in size were observed interacting with each other. Collisions occurred within a velocity range from below mm s− 1 up to cm s− 1. Aggregates continuously interacted with each other over a period of 900 s. During this time, more than 10 5 collisions occurred. Nearly 2000 collisions were analyzed in detail. No temporal stable net growth of larger aggregates was observed even though sticking collision occurred. Larger ensembles of aggregates sticking together were formed but were disassembled again during further collisional evolution. The concept of a bouncing barrier supports the formation of planetesimals by seeded collisional growth, as well as by gravitational instability favoring a significant total mass being limited to certain size ranges. Within our parameter set, the experiments confirm that bouncing barriers are one possible and likely evolutionary limit of self-consistent particle growth.
登录
查看更多内容
影响因子:
6.5
作者:
Thorsten Meisner;J. Teiser;G. Wurm
通讯作者:
Thorsten Meisner;J. Teiser;G. Wurm
影响因子:
6.5
作者:
T. Jankowski;G. Wurm;T. Kelling;J. Teiser;W. Sabolo;P. J. Guti'errez;I. Bertini
通讯作者:
I. Bertini
DOI:
10.1088/0004-637x/742/1/5
发表时间:
2011
期刊:
The Astrophysical Journal
影响因子:
--
作者:
J. Teiser;Ilka Engelhardt;G. Wurm
通讯作者:
G. Wurm
影响因子:
6.5
作者:
Seizinger
通讯作者:
Seizinger
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
U. Konopka;F. Mokler;A. Ivlev;M. Kretschmer;G. Morfill;H. Thomas;H. Rothermel;V. Fortov;A. Lipaev;V. Molotkov;A. Nefedov;Y. Baturin;Y. Budarin;A. Ivanov;M. Roth
通讯作者:
M. Roth