2017A&A...599A..80K


Query : 2017A&A...599A..80K

2017A&A...599A..80K - Astronomy and Astrophysics, volume 599A, 80-80 (2017/3-1)

Interferometric evidence for quantum heated particles in the inner region of protoplanetary disks around Herbig stars.

KLARMANN L., BENISTY M., MIN M., DOMINIK C., BERGER J.-P., WATERS L.B.F.M., KLUSKA J., LAZAREFF B. and LE BOUQUIN J.-B.

Abstract (from CDS):

Context. To understand the chemical composition of planets, it is important to know the chemical composition of the region where they form in protoplanetary disks. Because of its fundamental role in chemical and biological processes, carbon is a key element to trace.
Aims. We identify the carriers and processes behind the extended near-infrared (NIR) flux observed around several Herbig stars.
Methods. We compared the extended NIR flux from objects in the PIONIER Herbig Ae/Be survey with their flux in the policyclic aromatic hydrocarbon (PAH) features. HD 100453 is used as a benchmark case to investigate the influence of quantum heated particles, like PAHs or very small carbonaceous grains, in more detail. We use the Monte Carlo radiative transfer code MCMax to do a parameter study of the quantum heated particle (QHP) size and scale height and examine the influence of quantum heating on the amount of extended flux in the NIR visibilities.
Results. There is a correlation between the PAH feature flux of a disk and the amount of its extended NIR flux. We find that very small carbonaceous grains create the observed extended NIR flux around HD 100453 and still lead to a realistic SED. These results cannot be achieved without using quantum heating effects, e.g. only with scattered light and grains in thermal equilibrium.
Conclusions. It is possible to explain the extended NIR emission around Herbig stars with the presence of carbonaceous, quantum heated particles. Interferometric observations can be used to constrain the spatial distribution and typical size of carbonaceous material in the terrestrial planet forming region.

Abstract Copyright: © ESO, 2017

Journal keyword(s): infrared: planetary systems - astrochemistry - protoplanetary disks - techniques: interferometric - techniques: interferometric

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 HD 31648 Ae* 04 58 46.2655706952 +29 50 36.987625680 7.84 7.78 7.62 7.76 7.43 A5Vep 474 0
2 V* V1366 Ori Ae* 05 16 00.4765181328 -09 48 35.393784012 10.19 10.16 9.84 9.77 9.63 B9.5V 192 0
3 HD 95881 Em* 11 01 57.6218887080 -71 30 48.316074624   8.37 8.23     A0 94 0
4 HD 97048 Ae* 11 08 03.3109731720 -77 39 17.490777444 9.03 8.76 9.00   8.64 A0Vep 515 0
5 HD 100453 Ae* 11 33 05.5766482920 -54 19 28.547100696   8.09 7.79     A9Ve 253 1
6 HD 100546 Be* 11 33 25.4408872296 -70 11 41.241297948   6.71 6.30   6.64 A0VaekB8_lB 745 1
7 HD 139614 Ae? 15 40 46.3820275416 -42 29 53.538761832   8.47 8.24     A9VekA5mA5(_lB) 193 0
8 HD 141569 Y*O 15 49 57.7482550392 -03 55 16.341617064 7.22 7.20 7.12 7.00 7.04 A2VekB9mB9(_lB) 511 0
9 HD 142527 Ae* 15 56 41.8882637904 -42 19 23.248281828   9.04 8.34     F6III 583 1
10 HD 144432 Ae* 16 06 57.9533126832 -27 43 09.760564056 8.47 8.53 8.19 7.82 7.53 A9/F0V 230 1
11 HD 163296 Ae* 17 56 21.2881851168 -21 57 21.871819008 7.00 6.93 6.85 6.86 6.67 A1Vep 1003 0
12 HD 169142 Ae* 18 24 29.7799891464 -29 46 49.327400568   8.42 8.16     F1VekA3mA3_lB? 408 2
13 EM* MWC 297 Ae* 18 27 39.5265500160 -03 49 52.133050776 15.57 14.34 12.31 11.34   B1.5Ve 286 0
14 HD 179218 Ae* 19 11 11.2538919456 +15 47 15.636008472 7.55 7.476 7.39 7.25 7.21 A0Ve 241 0

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2023.02.02-18:59:48

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