2008A&A...485..107R


Query : 2008A&A...485..107R

2008A&A...485..107R - Astronomy and Astrophysics, volume 485, 107-116 (2008/7-1)

Near-infrared polarization images of the Orion proplyds.

ROST S., ECKART A. and OTT T.

Abstract (from CDS):

The aim is to study structure and polarization properties of the stars and planet systems in the active Orion HII-region. We performed AO-assisted high-resolution imaging polarimetry on selected Orion proplyds close to the Trapezium stars in the J, H, and K bands. Differential polarimetric images of one of the largest and brightest proplyds are interpreted using 3D radiation transfer simulations based on the Monte Carlo method. Although not fully resolvable by ground-based observations, the circumstellar material can be mapped with polarimetry. We present constraints on the disk parameters of the giant proplyd 177-341. We tested whether dust models with different grain size distributions could explain the observed extent of the polarization patterns and find that simple models with larger grains will not reproduce the spectral polarization behavior. The technique of polarimetric differential imaging (PDI) in the NIR provides a good opportunity to study the structure of the Orion proplyds.

Abstract Copyright:

Journal keyword(s): stars: early-type - stars: circumstellar matter - stars: planetary systems: protoplanetary disks - polarization - ISM: HII regions - stars: individual: 177-341

Nomenclature: Tables 1, 2: [OW94] SSs+MMS N=2 added.

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2334 0
2 NAME OMC 1 Cluster Cl* 05 35 14 -05 22.5           ~ 17 0
3 Parenago 1866 Y*O 05 35 15.7306101925 -05 23 22.478611275   16.0 14.5   12.446 ~ 49 0
4 JW 489 Y*O 05 35 15.7971242592 -05 23 26.560853196   12.3       ~ 68 0
5 Parenago 1867 Y*O 05 35 15.8392729571 -05 23 22.470378723     13.645   12.102 Ke 81 0
6 TCC 47 Y*O 05 35 15.85 -05 23 25.5           ~ 52 0
7 LV 3 Y*O 05 35 16.2879203016 -05 23 16.550843136   11.4     12.672 K3 71 0
8 TCC 65 Y*O 05 35 16.32060 -05 23 22.5317           ~ 39 2
9 * tet01 Ori C SB* 05 35 16.4662967280 -05 23 22.921811880 4.20 5.15 5.13 4.91 4.73 O7Vp 1406 1
10 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1621 1
11 TCC 70 Y*O 05 35 16.61480 -05 23 16.0836           ~ 47 0
12 * tet01 Ori G Y*O 05 35 16.723 -05 23 16.56 14.712 13.704 13.678   13.081 K0.7 102 1
13 M 42 HII 05 35 17 -05 23.4           ~ 4083 0
14 JW 558 Y*O 05 35 17.6729925216 -05 23 40.866823068 16.251 15.348 15.343   14.390 M5.9e 79 0
15 [OW94] 178-342 Y*O 05 35 17.760 -05 23 42.50           ~ 2 0
16 [OW94] 178-343 ? 05 35 17.760 -05 23 42.50           ~ 2 0
17 COUP 913 * 05 35 17.790 -05 23 44.20     19.93   15.369 M5.5 25 0
18 HD 98161 PM* 11 17 12.0072710256 -38 00 51.722245584   6.336 6.235     A1V 40 0

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