On the submillimeter opacity of protoplanetary disks

被引:395
作者
Draine, BT [1 ]
机构
[1] Princeton Univ Observ, Princeton, NJ 08544 USA
基金
美国国家科学基金会;
关键词
dust; extinction; planetary systems : protoplanetary disks; submillimeter;
D O I
10.1086/498130
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Solid particles with the composition of interstellar dust and power-law size distribution dn/da alpha a(-p) ( for a <= a(max) with a(max) greater than or similar to 3 lambda and 3 < p < 4) will have submillimeter opacity spectral index beta(lambda) equivalent to d 1n kappa/d 1n approximate to (p - 3) beta(ISM), where beta(ISM) approximate to 1: 7 is the opacity spectral index of interstellar dust material in the Rayleigh limit. For the power-law index p approximate to 3: 5, which characterizes interstellar dust and may apply for particles growing by agglomeration in protoplanetary disks, grain growth to sizes a greater than or similar to 3 mm will result in beta(1 mm) less than or similar to 1. Grain growth can naturally account for beta approximate to 1 observed for protoplanetary disks, provided that a(max) greater than or similar to 3 lambda.
引用
收藏
页码:1114 / 1120
页数:7
相关论文
共 47 条
[1]   ABSORPTIVE PROPERTIES OF SILICATE CORE-MANTLE GRAINS [J].
AANNESTAD, PA .
ASTROPHYSICAL JOURNAL, 1975, 200 (01) :30-41
[2]   Laboratory results on millimeter-wave absorption in silicate grain materials at cryogenic temperatures [J].
Agladze, NI ;
Sievers, AJ ;
Jones, SA ;
Burlitch, JM ;
Beckwith, SVW .
ASTROPHYSICAL JOURNAL, 1996, 462 (02) :1026-1040
[3]   Circumstellar dust disks in Taurus-Auriga: The submillimeter perspective [J].
Andrews, SM ;
Williams, JP .
ASTROPHYSICAL JOURNAL, 2005, 631 (02) :1134-1160
[4]  
Beckwith S. V. W., 2000, Protostars and planets 4, P533
[5]   PARTICLE EMISSIVITY IN CIRCUMSTELLAR DISKS [J].
BECKWITH, SVW ;
SARGENT, AI .
ASTROPHYSICAL JOURNAL, 1991, 381 (01) :250-258
[6]   Subarcsecond submillimeter continuum observations of Orion KL [J].
Beuther, H ;
Zhang, Q ;
Greenhill, LJ ;
Reid, MJ ;
Wilner, D ;
Keto, E ;
Marrone, D ;
Ho, PTP ;
Moran, JM ;
Rao, R ;
Shinnaga, H ;
Liu, SY .
ASTROPHYSICAL JOURNAL, 2004, 616 (01) :L23-L26
[7]   ON THE ORIGIN OF THE GRAIN-SIZE SPECTRUM OF INTER-STELLAR DUST [J].
BIERMANN, P ;
HARWIT, M .
ASTROPHYSICAL JOURNAL, 1980, 241 (02) :L105-L107
[8]   ANOMALOUS ABSORPTION IN AMORPHOUS SOLIDS AT LOW-TEMPERATURE [J].
BOSCH, MA .
PHYSICAL REVIEW LETTERS, 1978, 40 (13) :879-882
[9]   The fossilized size distribution of the main asteroid belt [J].
Bottke, WF ;
Durda, DD ;
Nesvorny, D ;
Jedicke, R ;
Morbidelli, A ;
Vokrouhlicky, D ;
Levison, H .
ICARUS, 2005, 175 (01) :111-140
[10]   Evidence for a developing gap in a 10 Myr old protoplanetary disk [J].
Calvet, N ;
D'Alessio, P ;
Hartmann, L ;
Wilner, D ;
Walsh, A ;
Sitko, M .
ASTROPHYSICAL JOURNAL, 2002, 568 (02) :1008-1016