CDS

2013A&A...555A.130M

Query : 2013A&A...555A.130M

2013A&A...555A.130M - Astronomy and Astrophysics, volume 555A, 130-130 (2013/7-1)

Transfer of polarized line radiation in 2D cylindrical geometry.

MILIC I.

Abstract (from CDS):

This paper deals with multidimensional NLTE polarized radiative transfer in the case of two level atom in the absence of lower level polarization. We aim to develop an efficient and robust method for 2D cylindrical geometry and to apply it to various axi-symmetrical astrophysical objects such as rings, disks, rotating stars, and solar prominences. We review the methods of short characteristics and Jacobi iteration applied to axisymmetric geometry. Then we demonstrate how to use a reduced basis for polarized intensity and polarized source function to self-consistently solve the coupled equations of radiative transfer and statistical equilibrium for linearly polarized radiation. We discuss some peculiarities that do not appear in Cartesian geometry, such as angular interpolation in performing the formal solution. We also show how to account for two different types of illuminating radiation. The proposed method is tested on homogeneous, self-emitting cylinders to compare the results with those in 1D geometries. We demonstrate a possible astrophysical application on a very simple model of circumstellar ring illuminated by a host star where we show that such a disk can introduce a significant amount of scattering polarization in the system. This method is found to converge properly and, apparently, to allow for substantial time saving compared to 3D Cartesian geometry. We also discuss the advantages and disadvantages of this approach in multidimensional radiative transfer modeling.

Abstract Copyright: ∼

Journal keyword(s): methods: numerical - line: formation - radiative transfer - polarization

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 * gam Cas Be* 00 56 42.5310945 +60 43 00.264089 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1196 1

Query : 2013A&A...555A.130M

Basic data :
* gam Cas -- 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: 		Be* (), * (2013ApJS,*,...), X (3A,AT,...), ** (**,ADS,...), IR (IRAS,IRC,...), Em* (EM*,[KW97]), V* (V*,AAVSO), UV (EUVE,TD1), gam (INTREF), NIR (2MASS), MIR (WISE)
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) : 		00 56 42.5310945 +60 43 00.264089 (Optical) [ 0.07 0.07 90 ] A 2007A&A...474..653V
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) : 		00 53 40.3457151 +60 26 47.405192 [ 0.07 0.07 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) : 		123.5768760058 -02.1484067521 [ 0.07 0.07 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 : 		25.17 -3.92 [0.08 0.08 90] A 2007A&A...474..653V
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) -6.8 [0.9] / z(~) -0.000023 [0.000003] / cz -6.80 [0.90]
   E 1953GCRV..C......0W
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): 		5.94 [0.12] A 2007A&A...474..653V
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: 		B0.5IVpe C 2011ARep...55...31S
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 1.18 [~] C 2002yCat.2237....0D
B 2.29 [~] C 2002yCat.2237....0D
V 2.39 [~] C 2002yCat.2237....0D
R 2.32 [~] C 2002yCat.2237....0D
G 2.064583 [0.006459] C 2022yCat.1355....0G
I 2.40 [~] C 2002yCat.2237....0D
J 2.039 [0.238] D 2003yCat.2246....0C
H 1.993 [0.182] D 2003yCat.2246....0C
K 1.756 [0.230] D 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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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:

  • is the star of the reflection nebula VDB 5.

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (70) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* gam Cas GCRV 526 PLX 185 uvby98 100005394 A
* 27 Cas GEN# +1.00005394 PLX 185.00 V* gam Cas
** BU 499A 1H 0053+604 PMC 90-93 23 VDB 5
** BU 1028A HD 5394 PMSC 00507+6010A WDS J00567+6043A
3A 0053+604 HIC 4427 PPM 12597 WEB 791
ADS 782 A HIP 4427 RAFGL 133 WISE J005642.67+604300.3
AG+60 106 HR 264 1RXS J005642.0+604300 1XRS 00537+604
ALS 6407 INTREF 57 2S 0053+604 [BM83] X0053+604
AT 0037+611 IRAS 00536+6026 SAO 11482 [FS2003] 0031
BD+59 144 IRC +60031 SKY# 1444 [HFE83] 40
BSD 8-901 JP11 439 SWIFT J0056.7+6043 [JE82] 20
CCDM J00567+6043A LS I +60 133 SWIFT J0056.5+6042 [KRL2007b] 9
CSI+59 144 1 1M 0050+592 TD1 521 [KW97] 4-31
EM* MWC 9 1M 0050+60 TIC 51962733 AAVSO 0050+60
1ES 0053+60.4 2MASS J00564251+6043002 TYC 4017-2319-1 Gaia DR3 426558460884582016
EUVE J0056+60.7 MCW 46 4U 0054+60 Gaia DR2 426558460877467776
FK5 32 N30 187 UBV 833
GC 1117 PBC J0056.5+6043 UCAC4 754-011026

References (1196 between 1850 and 2023) (Total 1196)
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


velocities : 21    distance : 2    ROT : 1    Fe_H : 2    PLX : 3    PM : 4    MK : 16   

   

Observing logs


ISO : 10    IUE : 162    XMM : 1   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : * gam Cas

Link by name to the catalogue in VizieR :

AG+60 106 ALS 6407 BD+59 144 CCDM J00567+6043A EUVE J0056+60.7
FK5 32 HD 5394 HIC 4427 HIP 4427 HR 264
IRAS 00536+6026 IRC +60031 LS I +60 133 2MASS J00564251+6043002 PLX 185
PPM 12597 RAFGL 133 1RXS J005642.0+604300 SAO 11482 TD1 521
TYC 4017-2319-1 UCAC4 754-011026 uvby98 100005394 A V* gam Cas VDB 5
WDS J00567+6043A WISE J005642.67+604300.3 Gaia DR3 426558460884582016 Gaia DR2 426558460877467776

Search by coordinates in Vizier (radius: 5 arcsec)

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2023.09.21-18:23:52

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