2004A&A...416L...9P

Query : 2004A&A...416L...9P

2004A&A...416L...9P - Astronomy and Astrophysics, volume 416, L9-12 (2004/3-4)

Predicted rotation signatures in MHD disc winds and comparison to DG Tau observations.

PESENTI N., DOUGADOS C., CABRIT S., FERREIRA J., CASSE F., GARCIA P. and O'BRIEN D.

Abstract (from CDS):

Motivated by the first detections of rotation signatures in the DG Tau jet (Bacciotti et al., 2002ApJ...576..222B), we examine possible biases affecting the relation between detected rotation signatures and true azimuthal velocity for self-similar MHD disc winds, taking into account projection, convolution as well as excitation gradients effects. We find that computed velocity shifts are systematically smaller than the true underlying rotation curve. When outer slower streamlines dominate the emission, we predict observed shifts increasing with transverse distance to the jet axis, opposite to the true rotation profile. Determination of the full transverse rotation profile thus requires high angular resolution observations (<5AU) on an object with dominant inner faster streamlines. Comparison of our predictions with HST/STIS observations of DG Tau clearly shows that self-similar, warm MHD disc wind models with λ=13 and an outer radius of the disc ≃3AU are able to reproduce detected velocity shifts, while cold disc wind models (λ>50) are ruled out for the medium-velocity component in the DG Tau jet.

Abstract Copyright: ∼

Journal keyword(s): ISM: jets and outflow - stars: formation - ISM: individual objects: DG Tau

Simbad objects: 1

goto Full paper

goto View the references in ADS

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 - 2024 		#notes
1 V* DG Tau Or* 04 27 04.6921275888 +26 06 16.060169268 13.57 13.97 10.50 12.28   K6Ve 1023 1

Query : 2004A&A...416L...9P

Basic data :
V* DG Tau -- Orion Variable
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: 		* (1954ArA,GSC,...), X (XEST,[ABG2007],...), IR (Elia,IRAS,...), TT* (1999AJ), Y*O (2010ApJS,[OMK98]), ** (**,WDS), V* (V*,AAVSO), ISM (Ced,[SS62]), smm (JCMTSE,JCMTSF), Rad (GBS,[CBS82]), MIR (AKARI,WISE), Or* (2017ARep), HH (HH), Y*? (2018A&A), Em* (HBC), HII (LBN), RNe (DG), EmO (MHA), UV (XEST), NIR (2MASS)
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 27 04.6921275888 +26 06 16.060169268 (Optical) [ 0.1040 0.0673 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 24 01.0086528733 +25 59 35.663750679 [ 0.1040 0.0673 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) : 		171.8423563286290 -15.6724277947846 [ 0.1040 0.0673 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 : 		5.514 -20.478 [0.141 0.102 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) 15.400 [0.600] / z(~) 0.000051 [0.000002] / cz 15.40 [0.60]
   (Opt) A 2012ApJ...745..119N
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): 		7.9836 [0.1182] 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: 		K6Ve C 1997A&A...321..497H
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 (8) :
U 13.57 [0.05] D 2007A&A...468..379A
B 13.97 [~] E ~
V 10.50 [~] C 2002yCat.2237....0D
R 12.28 [~] E 2003yCat.1289....0Z
G 11.876411 [0.013558] C 2020yCat.1350....0G
J 8.691 [0.018] C 2003yCat.2246....0C
H 7.72 [0.03] C 2003yCat.2246....0C
K 6.992 [0.020] C 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
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
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!). sed-help-icon
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 : 2809 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (37) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

GSC 01820-00330 IRAS 04240+2559 SV* SVS 1078 [CBS82] 042401.015+255934.84
** LOO 5A JCMTSE J042704.6+260617 TIC 268017134 [GBA2007] 1021
** KSA 19A JCMTSF J042704.6+260617 UCAC2 40978146 [OMK98] 14
AKARI-IRC-V1 J0427046+260616 JP11 5481 V* DG Tau [SS62] 18
Ced 33 LBN 788 WDS J04271+2606A AAVSO 0420+25B
DG 32 LBN 171.88-15.66 WISE J042704.69+260615.9 Gaia DR3 151262700852297728
Elia 3-5 2MASS J04270469+2606163 WISE J042704.70+260615.9 Gaia DR2 151262700852297728
GBS-VLA J042704.69+260615.8 MHA 259-10 XEST 02-OM-028
HBC 37 PSCz P04240+2559 XEST 02-022
HH 158 SSTtau 042704.6+260616 [ABG2007] 616

References (1023 between 1850 and 2024) (Total 1023)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Collections of Measurements


velocities : 1    V* : 1    distance : 2    ROT : 2    Fe_H : 1    PLX : 2    PM : 2    MK : 3   

   

Observing logs


herschel : 21    ISO : 6    IUE : 24    XMM : 1   

   

External archives :

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

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

Link by name to the catalogue in VizieR :

GSC 01820-00330 AKARI-IRC-V1 J0427046+260616 IRAS 04240+2559 2MASS J04270469+2606163 UCAC2 40978146
V* DG Tau WDS J04271+2606A WISE J042704.69+260615.9 WISE J042704.70+260615.9 Gaia DR3 151262700852297728
Gaia DR2 151262700852297728

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

Currently no annotations available

add an annotation to this object

report an error concerning the data of this object

To bookmark this query, right click on this link: simbad:objects in 2004A&A...416L...9P and select 'bookmark this link' or equivalent in the popup menu