2011A&A...532A..46C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST21:38:49

2011A&A...532A..46C - Astronomy and Astrophysics, volume 532A, 46-46 (2011/8-1)

On the polarisation of the Red Rectangle optical emission bands.

COX N.L.J., FOING B.H., CAMI J. and SARRE P.J.

Abstract (from CDS):

The origin of the narrow optical emission bands seen towards the Red Rectangle is not yet understood. We investigate the proposal that these are caused by luminescence of large carbonaceous molecules. We aim to measure the polarisation of the optical narrow Red Rectangle bands (RRBs). Polarised signals of several percent could be expected from certain asymmetric molecular rotators. The ESPaDOnS echelle spectrograph mounted at the CFHT was used to obtain high-resolution optical spectropolarimetric data of the Red Rectangle nebular emission. The RRBs at 5800, 5850, and 6615Å are detected in spectra of the nebular emission 7'' and 13'' north-east from the central star. The 5826Å and 6635Å RRB are detected only at the position nearest to the central star. For both positions the Stokes Q and U spectra show no unambiguous polarisation signal in any of the RRBs. We derive an upper limit of 0.02% line polarisation for these RRBs. A tentative feature with peak polarisation of 0.05% is seen for the 5800Å RRB at 7'' offset. However, the null spectra suggest that this may be an instrumental artefact. The lack of a clear polarisation signal for the five detected RRBs implies that if the emission is caused by luminescence of complex organics, these gas-phase molecular carriers are likely to have a high degree of symmetry because they do not exhibit a Q-branch in their rotational profile, although this may be modified by statistical effects.

Abstract Copyright:

Journal keyword(s): astrochemistry - polarization - circumstellar matter - stars: individual: Red Rectangle - line: profiles

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 HD 44179 pA* 06 19 58.2185496 -10 38 14.706068 9.51 9.33 9.02     B9Ib/II 715 0

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST21:38:49

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


Basic data :
HD 44179 -- Post-AGB Star (proto-PN)
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:
* (HD,ALS,...), ** (**,ADS,...), IR (AKARI,DENIS,...), V* (NSV,V*), smm (JCMTSE,JCMTSF), PN (PN), pA* (Ref)
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) :
06 19 58.2185496 -10 38 14.706068 (Optical) [ 1.77 1.46 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) :
06 17 36.9964003 -10 36 51.506889 [ 1.77 1.46 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) :
218.9680596240 -11.7646979564 [ 1.77 1.46 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 :
-6.46 -22.74 [2.21 2.03 0] 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) 21.50 [~] / z(~) 0.000072 [~] / cz 21.50 [~]
   D 1995A&A...293L..25V
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):
2.27 [2.28] 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:
B9Ib/II C 1999MSS...C05....0H
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 (7) :
U 9.51 [~] D 2003AJ....125.2531R
B 9.33 [~] E ~
V 9.02 [~] E ~
G 8.9048 [0.0040] C 2018yCat.1345....0G
J 6.577 [0.027] C 2003yCat.2246....0C
H 5.145 [0.015] C 2003yCat.2246....0C
K 3.655 [0.252] D 2003yCat.2246....0C
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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 (31) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 44179 GEN# +1.00044179J JCMTSF J061958.3-103814 TYC 5367-1134-1
** A 2925AB GSC2 S1003213403 2MASS J06195821-1038146 uvby98 100044179
ADS 4954 AB GSC 05367-01134 NAME Red Rectangle V* V777 Mon
AKARI-FIS-V1 J0619582-103822 HIC 30089 NSV 2919 WDS J06200-1038AB
ALS 19755 HIP 30089 PN G218.9-11.7 YZC 11 1886
BD-10 1476 IDS 06153-1036 AB PPM 217028 [LFO93] 0617-10
CCDM J06200-1038AB IRAS 06176-1036 RAFGL 915 Gaia DR2 3001477146793228288
DENIS J061958.2-103814 JCMTSE J061958.3-103814 SAO 151362

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References (715 between 1850 and 2020) (Total 715)
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 : 1    PM : 2    Fe_H : 2    PLX : 2    MK : 2   

   

Observing logs


ISO : 12    herschel : 37    IUE : 19   

   


External archives :

Data at NED - NASA/IPAC Extragalactic Database : HD 44179

Link by name to the catalogue in VizieR :

HD 44179 AKARI-FIS-V1 J0619582-103822 ALS 19755 BD-10 1476 CCDM J06200-1038AB
DENIS J061958.2-103814 GSC 05367-01134 HIC 30089 HIP 30089 IRAS 06176-1036
2MASS J06195821-1038146 NSV 2919 PN G218.9-11.7 PPM 217028 RAFGL 915
SAO 151362 TYC 5367-1134-1 uvby98 100044179 V* V777 Mon WDS J06200-1038AB
YZC 11 1886 Gaia DR2 3001477146793228288

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2020.07.03-21:38:49

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