2020A&A...640A.122B


Query : 2020A&A...640A.122B

2020A&A...640A.122B - Astronomy and Astrophysics, volume 640A, 122-122 (2020/8-1)

Self-scattering in protoplanetary disks with dust settling.

BRUNNGRABER R. and WOLF S.

Abstract (from CDS):

Scattering of re-emitted flux is considered to be at least partially responsible for the observed polarisation in the (sub-)millimetre wavelength range of several protoplanetary disks. Although the degree of polarisation produced by scattering is highly dependent on the dust model, early studies investigating this mechanism relied on the assumption of single grain sizes and simple density distribution of the dust. However, in the dense inner regions where this mechanism is usually most efficient, the existence of dust grains with sizes ranging from nanometres to millimetres has been confirmed. Additionally, the presence of gas forces larger grains to migrate vertically towards the disk midplane, introducing a dust segregation in the vertical direction. Using polarisation radiative transfer simulations, we analyse the dependence of the resulting scattered light polarisation at 350µm, 850µm, 1.3mm, and 2mm on various parameters describing protoplanetary disks, including the effect of dust grain settling. We find that the different disk parameters change the degree of polarisation mostly by affecting the anisotropy of the radiation field, the optical depth, or both. It is therefore very challenging to deduce certain disk parameter values directly from polarisation measurements alone. However, assuming a high dust albedo, it is possible to trace the transition from optically thick to optically thin disk regions. The degree of polarisation in most of the considered disk configurations is lower than what is found observationally, implying the necessity to revisit models that describe the dust properties and disk structure.

Abstract Copyright: © ESO 2020

Journal keyword(s): radiative transfer - protoplanetary disks - polarization - radiation mechanisms: thermal - scattering

Simbad objects: 1

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Number of rows : 1
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 V* AB Aur Ae* 04 55 45.8458932216 +30 33 04.292077032 7.20 7.16 7.05 6.96 6.70 A0Ve 1006 2

Query : 2020A&A...640A.122B

Basic data :
V* AB Aur -- Herbig Ae/Be Star
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
* (2013ApJ,HD,...), IR (AKARI,IRAS,...), Em* (EM*,HBC,...), Y*O (2010ApJS), V* (V*,AAVSO), X (XEST,[GBA2007]), smm (JCMTSE,JCMTSF), Ae* (1999AJ), TT* (2014ApJ), Or* (2017ARep), Ae? (2003AJ), Rad (GBS), UV (TD1)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
04 55 45.8458932216 +30 33 04.292077032 (Optical) [ 0.0318 0.0165 90 ] A 2020yCat.1350....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
04 52 34.3310854926 +30 28 21.579760419 [ 0.0318 0.0165 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
172.4990670746149 -07.9807725164859 [ 0.0318 0.0165 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr :
4.018 -24.027 [0.039 0.028 90] A 2020yCat.1350....0G
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz :
V(km/s) 8.90 [0.9] / z(~) 0.000030 [0.000003] / cz 8.90 [0.90]
   A 2006AstL...32..759G
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas):
6.4127 [0.0372] A 2020yCat.1350....0G
Spectral type is made of 3 parts: %coding is composed of 4 parts :
  • the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities;
  • a quality letter: A=best quality→E=worst quality, {� } =unknown quality %
  • a quality letter: A=best quality -> E=worst quality, {� } =unknown quality
  • bibcode : bibcode of the spectral type reference
Spectral type:
A0Ve C 2013ApJ...771..110M
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (9) :
U 7.20 [~] C 2002yCat.2237....0D
B 7.16 [~] C 2002yCat.2237....0D
V 7.05 [~] C 2002yCat.2237....0D
R 6.96 [0.05] D 2008ApJ...689..513T
G 7.111234 [0.002941] C 2020yCat.1350....0G
I 6.70 [0.09] D 2008ApJ...689..513T
J 5.936 [0.018] C 2003yCat.2246....0C
H 5.062 [0.020] C 2003yCat.2246....0C
K 4.230 [0.016] E 2003yCat.2246....0C
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
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Some important notes on this object about identifications and objects associations.
notes:


Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 2
The count displayed here is the number of children objects.
The list obtained by clicking the button may be larger, as some children may be linked with different references or probability.

%This number is the number of distinct objets linked, by using this button, you will obtain all links (may be more than one) from that object to his children

: 1
: 1974 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (46) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 31293 HBC 78 RAFGL 5130 WEB 4447
AG+30 462 HIC 22910 SAO 57506 WISEA J045545.84+303304.0
AKARI-IRC-V1 J0455458+303303 HIP 22910 SKY# 7693 WISE J045545.83+303304.8
AKARI-FIS-V1 J0455460+303320 IRAS 04525+3028 SSV LDN 1517 1 XEST 26-043
BD+30 741 JCMTSE J045545.8+303305 SV* HV 3554 [GBA2007] 2225
EM* MWC 93 JCMTSF J045545.8+303305 TD1 3698 [KW97] 19-56
FMC 5 JP11 947 TIC 96680681 AAVSO 0449+30B
GBS-VLA J045545.85+303304.0 2MASS J04554582+3033043 TYC 2387-812-1 Gaia DR3 156917493449670656
GC 5998 PLX 1098 UBV M 10443 Gaia DR1 156917489152834688
GCRV 2908 PLX 1098.00 uvby98 100031293 Gaia DR2 156917493449670656
GEN# +1.00031293 PPM 69756 V* AB Aur
GSC 02387-00812 PSCz P04525+3028 VDB 31

References (1006 between 1850 and 2023) (Total 1006)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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                Reference summaries :

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Collections of Measurements


velocities : 5    V* : 1    distance : 3    Fe_H : 1    PLX : 6    PM : 6    MK : 7   

   

Observing logs


herschel : 11    ISO : 4    IUE : 284   

   


External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : V* AB Aur

Link by name to the catalogue in VizieR :

HD 31293 AG+30 462 AKARI-IRC-V1 J0455458+303303 AKARI-FIS-V1 J0455460+303320 BD+30 741
GSC 02387-00812 HIC 22910 HIP 22910 IRAS 04525+3028 2MASS J04554582+3033043
PLX 1098 PPM 69756 RAFGL 5130 SAO 57506 TD1 3698
TYC 2387-812-1 uvby98 100031293 V* AB Aur VDB 31 WISEA J045545.84+303304.0
WISE J045545.83+303304.8 Gaia DR3 156917493449670656 Gaia DR1 156917489152834688 Gaia DR2 156917493449670656

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2022.12.04-17:10:32

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