2008ApJ...673.1106L


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.13CET12:04:55

2008ApJ...673.1106L - Astrophys. J., 673, 1106-1122 (2008/February-1)

Circumstellar dust created by terrestrial planet formation in HD 113766.

LISSE C.M., CHEN C.H., WYATT M.C. and MORLOK A.

Abstract (from CDS):

We present an analysis of the gas-poor circumstellar material in the HD 113766 binary system (F3/F5, 10-16 Myr), recently observed by the Spitzer Space Telescope. For our study we have used the IR mineralogical model derived from observations of the Deep Impact experiment. We find the dust dominated by warm, fine (∼1 µm) particles, abundant in Mg-rich olivine, crystalline pyroxenes, amorphous silicates, Fe-rich sulfides, amorphous carbon, and colder water ice. The warm dust material mix is akin to an inner main-belt asteroid of S-type composition. The ∼440 K effective temperature of the warm dust implies that the bulk of the observed material is in a narrow belt ∼1.8 AU from the 4.4 L central source, in the terrestrial planet-forming region and habitable zone of the system (equivalent to 0.9 AU in the solar system). The icy dust lies in two belts, located at 4-9 and 30-80 AU. The lower bound of warm dust mass in 0.1-20 µm, dn/da∼a–3.5 particles is very large, at least 3x1020 kg, equivalent to a 320 km radius asteroid of 2.5 g/cm3 density. Assuming 10 m particles are the largest present, the lower bound of warm dust mass is at least 0.5 MMars. Neither primordial nor mature, the dust around HD 113766A originates from catastrophic disruption of terrestrial planet embryo(s) and subsequent grinding of the fragments or from collisions in a young, extremely dense asteroid belt undergoing planetary aggregation. The persistence of the strong IR excess over the last two decades argues for a mechanism to provide replenishment of the circumstellar material on yearly timescales.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - Stars: Planetary Systems: Formation - Stars: Planetary Systems: Protoplanetary Disks - Radiation Mechanisms: Thermal - Techniques: Spectroscopic

CDS comments: HD 99800B is a misprint for HD 98800B

Simbad objects: 25

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Number of rows : 25

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * bet03 Tuc ** 00 32 43.9055907013 -63 01 53.397968811 5.15 5.13 5.09     A0V 108 0
2 HD 11376 PM* 01 51 43.5594989034 -08 06 18.248971628   10.01 9.43     G1V 7 0
3 V* DK Cet BY* 01 57 48.9776543901 -21 54 05.343324011   8.73 8.057   7.343 G4V 111 1
4 HD 12349 PM* 02 00 06.1382687465 -41 32 36.179705022   9.64 8.66     K0III 8 0
5 NGC 869 OpC 02 19 00 +57 07.7           ~ 418 0
6 NGC 884 OpC 02 22 23 +57 07.5           ~ 437 0
7 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1601 1
8 HD 69830 PM* 08 18 23.9469692487 -12 37 55.810202572   6.74 5.95     G8:V 454 2
9 * eta Cha * 08 41 19.5144242735 -78 57 48.102318990 5.02 5.351 5.453     B8V 209 0
10 NAME eta Cha Association MGr 08 42 06 -79 01.6           ~ 299 0
11 V* CE Ant TT* 10 42 30.1021269333 -33 40 16.226774953   12.21 10.91   9.10 M2Ve 144 1
12 HD 98800B SB* 11 22 05.288 -24 46 39.05           ~ 107 1
13 HD 100546 Be* 11 33 25.4404858122 -70 11 41.239343121   6.71 6.30   6.64 A0VaekB8_lB 615 1
14 V* EF Cha dS* 12 07 05.5213509446 -78 44 28.013631162   7.74 7.46     A9III/IV 37 0
15 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 334 1
16 HD 113766B * 13 06 35.712 -46 02 01.78   8.77 8.31     F6V 4 0
17 HD 113766 ** 13 06 35.83622 -46 02 02.0178   7.91 7.56     F3/5V 91 1
18 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 526 0
19 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1080 1
20 GD 362 WD* 17 31 34.3169169136 +37 05 20.709668210   16.3   16.4   DAZB 138 0
21 HD 163296 Ae* 17 56 21.2882188601 -21 57 21.872343282 7.00 6.93 6.85 6.86 6.67 A1Vep 733 0
22 HD 172555 PM* 18 45 26.9004853 -64 52 16.539796   4.967 4.767     A7V 225 0
23 * eta Tel ** 19 22 51.20620 -54 25 26.1473   5.035 5.020   4.99 A0V+M7/8V 180 0
24 * alf PsA ** 22 57 39.04625 -29 37 20.0533 1.31 1.25 1.16 1.11 1.09 A4V 1101 3
25 V* ZZ Psc WD* 23 28 47.6364608228 +05 14 54.234982405   13.17   13.0   DA4.1 419 0

    Equat.    Gal    SGal    Ecl

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2019.11.13-12:04:55

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