2003A&A...408..553O


Query : 2003A&A...408..553O

2003A&A...408..553O - Astronomy and Astrophysics, volume 408, 553-558 (2003/9-3)

JHK'-band IOTA interferometry of the circumstellar environment of R CrB.

OHNAKA K., BECKMANN U., BERGER J.-P., BREWER M.K., HOFMANN K.-H., LACASSE M.G., MALANUSHENKO V., MILLAN-GABET R., MONNIER J.D., PEDRETTI E., SCHERTL D., SCHLOERB F.P., SHENAVRIN V.I., TRAUB W.A., WEIGELT G. and YUDIN B.F.

Abstract (from CDS):

We report the first long-baseline interferometry of the circumstellar dust environment of R CrB. The observations were carried out with the Infrared Optical Telescope Array (IOTA), using our new JHK' beam combiner which enables us to record fringes in the J, H, and K' bands simultaneously. The circumstellar dust envelope of R CrB is resolved at a baseline of 21m along a position angle of ∼170°, and the visibilities in the J, H, and K' bands are 0.97±0.06, 0.78±0.06, and 0.61±0.03, respectively. These observed visibilities, together with the K'-band visibility obtained by speckle interferometry with baselines of up to 6m, and the spectral energy distribution are compared with predictions from spherical dust shell models which consist of the central star and an optically thin dust shell. The comparison reveals that the observed J- and H-band visibilities are in agreement with those predicted by these models, and the inner radius and inner boundary temperature of the dust shell were derived to be 60-80R* and 950-1050K, respectively. However, the predicted K'-band visibilities are found to be ∼10% smaller than the one obtained with IOTA. Given the simplifications adopted in our models and the complex nature of the object, this can nevertheless be regarded as rough agreement. As a hypothesis to explain this small discrepancy, we propose that there might be a group of newly formed dust clouds, which may appear as a third visibility component.

Abstract Copyright:

Journal keyword(s): techniques: interferometric - stars: circumstellar matter - stars: mass-loss - stars: individual: R CrB - stars: variable: general - 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 - 2021
#notes
1 V* R CrB RC* 15 48 34.4147978750 +28 09 24.298218765 6.44 6.31 5.71 5.26 5.08 G0Iep 762 0

    Equat.    Gal    SGal    Ecl

Query : 2003A&A...408..553O

Basic data :
V* R CrB -- Variable Star of R CrB 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:
RC* (), * (HD,AG,...), V* (ASAS,V*,...), IR (IRAS,2MASS,...), Em* (EM*), pA* (2007A&A), 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) :
15 48 34.4147978750 +28 09 24.298218765 (Optical) [ 0.0566 0.1298 90 ] A 2018yCat.1345....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) :
15 46 30.6956798199 +28 18 32.308224600 [ 0.0566 0.1298 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) :
045.0495702423490 +50.9781786391461 [ 0.0566 0.1298 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 :
-2.447 -11.806 [0.144 0.344 90] A 2018yCat.1345....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) 27.83 [0.77] / z(~) 0.000093 [0.000003] / cz 27.83 [0.77]
   A 2007AJ....133.2524W
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):
0.7615 [0.0613] A 2018yCat.1345....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:
G0Iep C 1997BSAO...44....5K
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 6.44 [~] C 2002yCat.2237....0D
B 6.31 [~] C 2002yCat.2237....0D
V 5.71 [~] C 2002yCat.2237....0D
R 5.26 [~] C 2002yCat.2237....0D
G 9.1046 [0.0664] C 2018yCat.1345....0G
I 5.08 [~] C 2002yCat.2237....0D
J 5.364 [0.024] C 2003yCat.2246....0C
H 5.089 [0.034] C 2003yCat.2246....0C
K 4.564 [0.024] 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
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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!).
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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 (33) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 141527 GSC 02039-01605 PPM 104338 V* R CrB
AG+28 1513 HIC 77442 RAFGL 4219 WEB 13113
ASAS J154834+2809.4 HIP 77442 ROT 2225 YZ 28 7350
BD+28 2477 HR 5880 SAO 84015 AAVSO 1544+28A
EM* CDS 886 IRAS 15465+2818 SKY# 28584 Gaia DR1 1224565819711854208
GC 21257 2MASS J15483440+2809242 TD1 18592 Gaia DR2 1224565824009017600
GCRV 9116 N30 3552 TIC 284759010
GEN# +1.00141527 PLX 3581 TYC 2039-1605-1
GSC2 N1330022410 PLX 3581.00 uvby98 100141527

References (762 between 1850 and 2021) (Total 762)
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 : 10    distance : 1    ROT : 2    Fe_H : 6    PLX : 5    PM : 6    MK : 1   

   

Observing logs


herschel : 5    ISO : 41    IUE : 172   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : V* R CrB

Link by name to the catalogue in VizieR :

HD 141527 AG+28 1513 BD+28 2477 GSC 02039-01605 HIC 77442
HIP 77442 HR 5880 IRAS 15465+2818 2MASS J15483440+2809242 PLX 3581
PPM 104338 RAFGL 4219 SAO 84015 TD1 18592 TYC 2039-1605-1
uvby98 100141527 V* R CrB Gaia DR1 1224565819711854208 Gaia DR2 1224565824009017600

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2021.07.29-18:12:52

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