2019A&A...626A..26I


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST15:39:30

2019A&A...626A..26I - Astronomy and Astrophysics, volume 626A, 26-26 (2019/6-1)

Photometry, spectroscopy, and polarimetry of distant comet C/2014 A4 (SONEAR).

IVANOVA O., LUK'YANYK I., KOLOKOLOVA L., DAS H.S., HUSARIK M., ROSENBUSH V., AFANASIEV V., SVOREN J., KISELEV N. and KRUSHINSKY V.

Abstract (from CDS):


Context. The study of distant comets, which are active at large heliocentric distances, is important for a better understanding of their physical properties and mechanisms of long-lasting activity.
Aims. We analyzed the dust environment of the distant comet C/2014 A4 (SONEAR), with a perihelion distance near 4.1au, using comprehensive observations obtained by different methods.
Methods. We present an analysis of spectroscopy, photometry, and polarimetry of comet C/2014 A4 (SONEAR), which were performed on November 5-7, 2015, when its heliocentric distance was 4.2au and phase angle was 4.7°. Long-slit spectra and photometric and linear polarimetric images were obtained using the focal reducer SCORPIO-2 attached to the prime focus of the 6 m telescope BTA (SAO RAS, Russia). We simulated the behavior of color and polarization in the coma presenting the cometary dust as a set of polydisperse polyshapes rough spheroids.
Results. No emission features were detected in the 3800-7200Å wavelength range. The continuum showed a reddening effect with the normalized gradient of reflectivity 21.6±0.2% per 1000 Å within the 4650-6200 Å wavelength region. The fan-like structure in the sunward hemisphere was detected. The radial profiles of surface brightness differ for r-sdss and g-sdss filters, indicating a predominance of submicron and micron-sized particles in the cometary coma. The dust color (g-r) varies from 0.75±0.05m to 0.45±0.06m along the tail. For an aperture radius near 20000km, the dust productions in various filters were estimated as Afρ=680±18cm (r-sdss) and 887±16cm (g-sdss). The polarization map shows spatial variations in polarization over the coma from about -3% near the nucleus to -8% at a cometocentric distance of about 150000km. Our simulations show that the dust particles are dominated (or covered) by ice and tholin-like organics. Spatial changes in the color and polarization can be explained by particle fragmentation.

Abstract Copyright: © ESO 2019

Journal keyword(s): comets: general - comets: individual: C/2014 A4 (SONEAR) - polarization - scattering - methods: miscellaneous

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 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 983 0

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST15:39:30

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


Basic data :
BD+52 913 -- White Dwarf
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:
* (BD,ALS,...), WD* (Ref,2017ApJ...848...11B,...), UV (2EUVE,EUVE,...), X (RE,RX,...), ** (**,WDS), PM* (Ref,G), V* (1SWASP), IR (2MASS), blu (FB)
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) :
05 05 30.6182785658 +52 49 51.920797126 (Optical) [ 0.0617 0.0583 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) :
05 01 31.4579636200 +52 45 52.178135774 [ 0.0617 0.0583 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) :
155.9533297993596 +07.0990555076348 [ 0.0617 0.0583 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 :
12.592 -93.525 [0.122 0.106 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) 69.00 [~] / z(~) 0.000230 [~] / cz 69.01 [~]
   D 1994A&AS..108..603B
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):
18.8945 [0.0647] 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:
DA.8 C 2011ApJ...743..138G
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 10.25 [~] D 2007AJ....133..768L
B 11.44 [0.08] D 2000A&A...355L..27H
V 11.69 [0.17] D 2000A&A...355L..27H
R 11.93 [~] D 2007AJ....133..768L
G 11.7379 [0.0008] C 2018yCat.1345....0G
I 12.108 [~] D 2007AJ....133..768L
J 12.543 [0.021] C 2003yCat.2246....0C
H 12.669 [0.025] C 2003yCat.2246....0C
K 12.764 [0.023] C 2003yCat.2246....0C
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within radius 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!).

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 1 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (32) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

BD+52 913 G 191-2B RE J0505+52 uvby98 005200913
** WNO 44B G 191-B2B RE J050530+524929 VVO 366
ALS 8157 HIC 23692 RE J0505+524 WDS J05055+5249B
EGGR 247 HIP 23692 RX J0505.5+5250 WD 0501+527
2EUVE J0505+52.8 LS V +52 21 1RXS J050525.8+524913 WD 0501+524
EUVE J0505+52.8 2MASS J05053062+5249519 1SWASP J050530.60+524951.9 [SPB96] 679
FB 44 2RE J0505+524 TYC 3734-2324-1 [VKN2011] J050530.7+524950
GCRV 21703 2RE J050530+524941 USNO 122 Gaia DR2 266077145295627520

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References (983 between 1850 and 2020) (Total 983)
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


distance : 2    velocities : 1    PM : 4    Fe_H : 3    PLX : 4    MK : 4   

   

Observing logs


XMM : 1    IUE : 63   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : BD+52 913

Link by name to the catalogue in VizieR :

BD+52 913 ALS 8157 EUVE J0505+52.8 G 191-2B HIC 23692
HIP 23692 LS V +52 21 2MASS J05053062+5249519 2RE J0505+524 2RE J050530+524941
1RXS J050525.8+524913 TYC 3734-2324-1 uvby98 005200913 WDS J05055+5249B WD 0501+527
WD 0501+524 Gaia DR2 266077145295627520

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2020.07.04-15:39:30

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