2006A&A...452..885C

Query : 2006A&A...452..885C

2006A&A...452..885C - Astronomy and Astrophysics, volume 452, 885-895 (2006/6-4)

A new analytical thin-dusty-shell model to interpret interferometric data. Application to the S star V* pi.01 Gru.

CRUZALEBES P. and SACUTO S.

Abstract (from CDS):

High angular resolution techniques allow the determination of physical and geometrical parameters characterizing the circumstellar dusty environment of late-type stars. The resolution of the radiative transfer equation under the thin-shell approximation provides an analytical expression for the interferometric visibility profile, which can then be compared to simple ad-hoc geometrical models and to physical models based on radiative transfer. Using the DUSTY numerical code to calculate theoretical visibilities of the S star π1 Gru, in agreement with spectrophotometric measurements from the near to the far infrared, we compared the validity of the output parameters found by the χ2 least-square analysis of the visibility, given with the thin-shell model and with a simple disk+ring geometrical model of the envelope. The results are discussed in terms of fitting the shape of the intensity profile and of the number of free parameters to be considered.

Abstract Copyright: ∼

Journal keyword(s): radiative transfer - methods: analytical - techniques: interferometric - circumstellar matter - stars: late-type - infrared: stars

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 - 2024 		#notes
1 * pi.01 Gru S* 22 22 44.2083897000 -45 56 52.791160956 10.52 8.62 6.55 3.19 0.52 S5,7: 193 0

Query : 2006A&A...452..885C

Basic data :
* pi.01 Gru -- S 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: 		* (*,AC2000,...), ** (**,CCDM,...), S* (1954ApJ,CSS,...), V* (V*,AAVSO), IR (IRAS,RAFGL), LP* (2009yCat), LP? (2022yCat), 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) : 		22 22 44.2083897000 -45 56 52.791160956 (Optical) [ 0.2330 0.2927 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) : 		22 19 41.2949809376 -46 12 03.061052975 [ 0.2330 0.2927 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) : 		350.2820115212514 -55.1638036900881 [ 0.2330 0.2927 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 : 		31.106 -10.338 [0.252 0.347 90] A 2020yCat.1350....0G
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): 		6.1858 [0.4466] 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: 		S5,7: B 1954ApJ...120..484K
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 10.52 [~] C 2002yCat.2237....0D
B 8.62 [~] C 2002yCat.2237....0D
V 6.55 [~] C 2002yCat.2237....0D
R 3.19 [~] C 2002yCat.2237....0D
G 3.592578 [0.008820] C 2020yCat.1350....0G
I 0.52 [~] C 2002yCat.2237....0D
J -0.62 [~] C 2002yCat.2237....0D
H -1.71 [~] C 2002yCat.2237....0D
K -2.06 [~] C 2002yCat.2237....0D
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 link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (41) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* 161 Gru GEN# +1.00212087 2MASS J22224445-4556524 V* pi.01 Gru
* pi.01 Gru GSC 08439-00392 PPM 328190 WDS J22227-4557A
* pi. Gru HD 212087 RAFGL 4289 WISE J222244.22-455652.6
** I 135A Hen 4-202 S1* 702 [ELL90] 249
AC2000 3976182 HIC 110478 SAO 231105 [LFO93] 2219-46
CCDM J22227-4557A HIP 110478 SKY# 42605 AAVSO 2216-46
CD-46 14292 HR 8521 TIC 382420379 Gaia DR3 6518817665843312000
CPC 0 19877 IDS 22166-4627 A TYC 8439-392-1 Gaia DR2 6518817665841827200
CPD-46 10395 IRAS 22196-4612 UBV 21720
CSS 1294 IRAS 22194-4612 UCAC3 89-416212
GC 31273 JP11 3477 UCAC4 221-187339

References (193 between 1850 and 2024) (Total 193)
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


V* : 1    distance : 1    PLX : 4    PM : 5    MK : 5   

   

Observing logs


herschel : 8    ISO : 5    IUE : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : * pi.01 Gru

Link by name to the catalogue in VizieR :

AC2000 3976182 CCDM J22227-4557A CD-46 14292 CPD-46 10395 GSC 08439-00392
HD 212087 HIC 110478 HIP 110478 HR 8521 IRAS 22196-4612
IRAS 22194-4612 2MASS J22224445-4556524 PPM 328190 RAFGL 4289 SAO 231105
TYC 8439-392-1 UCAC3 89-416212 UCAC4 221-187339 V* pi.01 Gru WDS J22227-4557A
WISE J222244.22-455652.6 Gaia DR3 6518817665843312000 Gaia DR2 6518817665841827200

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