2016A&A...589A..87B


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST06:56:00

2016A&A...589A..87B - Astronomy and Astrophysics, volume 589A, 87-87 (2016/5-1)

Self-organisation in protoplanetary discs. Global, non-stratified Hall-MHD simulations.

BETHUNE W., LESUR G. and FERREIRA J.

Abstract (from CDS):

Context. Recent observations have revealed organised structures in protoplanetary discs, such as axisymmetric rings or horseshoe concentrations, evocative of large-scale vortices. These structures are often interpreted as the result of planet-disc interactions. However, these discs are also known to be unstable to the magneto-rotational instability (MRI) which is believed to be one of the dominant angular momentum transport mechanism in these objects. It is therefore natural to ask whether the MRI itself could produce these structures without invoking planets.
Aims. The nonlinear evolution of the MRI is strongly affected by the low ionisation fraction in protoplanetary discs. The Hall effect in particular, which is dominant in dense and weakly ionised parts of these objects, has been shown to spontaneously drive self-organising flows in local, shearing box simulations. Here, we investigate the behaviour of global MRI-unstable disc models dominated by the Hall effect and characterise their dynamics.
Methods. We validated our implementation of the Hall effect into the PLUTO code with predictions from a spectral method in cylindrical geometry. We then performed 3D unstratified Hall-MHD simulations of Keplerian discs for a broad range of Hall, Ohmic, and ambipolar Elsasser numbers.
Results. We confirm the transition from a turbulent to an organised state as the intensity of the Hall effect is increased. We observe the formation of zonal flows, their number depending on the available magnetic flux and on the intensity of the Hall effect. For intermediate Hall intensity, the flow self-organises into long-lived magnetised vortices. Neither the addition of a toroidal field nor Ohmic or ambipolar diffusion change this picture drastically in the range of parameters we have explored.
Conclusions. Self-organisation by the Hall effect is a robust phenomenon in global non-stratified simulations. It is able to quench turbulent transport and spontaneously produce axisymmetric rings or sustained vortices. The ability of these structures to trap dust particles in this configuration is demonstrated. We conclude that Hall-MRI driven organisation is a plausible scenario that could explain some of the structures found in recent observations.

Abstract Copyright: © ESO, 2016

Journal keyword(s): accretion, accretion disks - magnetohydrodynamics (MHD) - protoplanetary disks - stars: formation - turbulence

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 - 2020
#notes
1 V* HL Tau Or* 04 31 38.471952 +18 13 58.08504   15.89 14.49 14.39   K5 1209 0

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST06:56:00

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


Basic data :
V* HL Tau -- Variable Star of Orion Type
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:
* (EPIC,GSC,...), X (XEST,2XMM,...), IR (2MASS,AKARI,...), ** (**,WDS), Y*O (Ref,[GMM2009]), TT* (Ref,2014ApJ...786...97H), Or* (Ref,2017ARep...61...80S), V* (V*,AAVSO), smm (JCMTSE,JCMTSF), HH (HH), Em* (HBC), Rad (GBS)
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 31 38.471952 +18 13 58.08504 (Optical) [ 27 103 90 ] B 2012yCat.1322....0Z
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 28 44.437382 +18 07 36.10510 [ 27 103 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) :
178.858953015 -19.972237733 [ 27 103 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 :
4.2 -15.3 [3.2 6.9 90] C 2012yCat.1322....0Z
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:
K5 D 2004ApJ...616..998W
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 (11) :
B 15.89 [0.11] D 2012yCat.1322....0Z
V 14.49 [0.06] D 2012yCat.1322....0Z
R 14.39 [0.18] E 2012yCat.1322....0Z
J 10.624 [0.042] C 2003yCat.2246....0C
H 9.171 [0.046] C 2003yCat.2246....0C
K 7.410 [0.017] C 2003yCat.2246....0C
u (AB) 16.887 [0.009] C 2009yCat.2294....0A
g 15.20 [0.06] D 2012yCat.1322....0Z
r 13.80 [0.07] D 2012yCat.1322....0Z
i 13.01 [0.08] D 2012yCat.1322....0Z
z (AB) 12.296 [0.002] C 2009yCat.2294....0A
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 4 : 2686 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (28) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

2MASS J04313843+1813576 HBC 49 UCAC2 38202581 [BFR2003] 35
** HER 10B HH 150 UCAC4 542-009387 [FGM2003] 29
AKARI-IRC-V1 J0431384+181357 JCMTSE J043138.3+181356 V* HL Tau [FGM2003] S19
EPIC 210690913 JCMTSF J043138.3+181356 WDS J04317+1814B [FK83] LDN 1551 11
GBS-VLA J043138.42+181357.3 JP11 5275 WISE J043138.43+181357.5 [GBA2007] 1319
GSC 01269-01065 SDSS J043138.46+181357.8 XEST 22-043 [GMM2009] Tau L1551 2
Haro 6-14 SSV LDN 1551 1 2XMM J043138.4+181357 AAVSO 0425+18B

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References (1209 between 1850 and 2020) (Total 1209)
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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Collections of Measurements


MK : 2    V* : 1   

   

Observing logs


ISO : 8    herschel : 2    IUE : 4   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : V* HL Tau

Link by name to the catalogue in VizieR :

2MASS J04313843+1813576 AKARI-IRC-V1 J0431384+181357 GSC 01269-01065 SDSS J043138.46+181357.8 UCAC2 38202581
UCAC4 542-009387 V* HL Tau WDS J04317+1814B WISE J043138.43+181357.5

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2020.08.14-06:56:00

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