2001A&A...374.1030I


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST17:53:47

2001A&A...374.1030I - Astronomy and Astrophysics, volume 374, 1030-1034 (2001/8-2)

Can the 33s pulsations observed from AE Aquarii be explained in terms of accretion onto the white dwarf surface?

IKHSANOV N.R.

Abstract (from CDS):

The 33s pulsing component observed from AEAqr is frequently assumed to be the result of accretion onto the surface of a rotating white dwarf. The validity of this assumption is discussed in the present paper. I show that under the conditions of interest the white dwarf is in the state of supersonic propeller and the efficiency of plasma penetration into its magnetosphere is ≲0.1%. This is too small to explain the observed luminosity of the pulsing component. Moreover, I find that for the currently established value of the angle between the magnetic and rotational axes of the white dwarf, the material entering the magnetosphere at the boundary can never reach its surface by flowing along the magnetic field lines. I conclude that the assumption about the direct accretion onto the surface of the white dwarf in AEAqr contradicts the observational data obtained in the optical/UV and thus cannot be accepted.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - binaries: close - stars: magnetic fields - stars: white dwarfs - stars: individual: AE Aqr

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 V* AE Aqr DQ* 20 40 09.1598509019 -00 52 15.057042857   12.46 10.40   10.191 K3-5IV/V 611 0

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST17:53:47

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


Basic data :
V* AE Aqr -- CV DQ Her type (intermediate polar)
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:
DQ* (), * (HIP,CSI,...), X (1AXG,1E,...), V* (AN,ASAS,...), SB* (SBC7,SBC9), PM* (Ref,PM), Em* (EM*), IR (2MASS), UV (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) :
20 40 09.1598509019 -00 52 15.057042857 (Optical) [ 0.0376 0.0298 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) :
20 37 34.2827635953 -01 02 56.161919542 [ 0.0376 0.0298 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) :
045.2804239391516 -24.4186336332170 [ 0.0376 0.0298 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 :
70.564 13.123 [0.085 0.052 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) -69.30 [4.8] / z(~) -0.000231 [0.000016] / cz -69.29 [4.80]
   C 2006AstL...32..759G
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):
10.9659 [0.0552] 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:
K3-5IV/V C 2009A&ARv..17..251S
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 (12) :
B 12.46 [0.26] D 2000A&A...355L..27H
V 10.40 [~] C 2002yCat.2237....0D
G 10.9525 [0.0049] C 2018yCat.1345....0G
I 10.191 [0.145] D 2012AcA....62...67K
J 9.45 [~] C 2002yCat.2237....0D
H 8.89 [~] C 2002yCat.2237....0D
K 8.76 [~] C 2002yCat.2237....0D
u (AB) 15.275 [0.009] C 2009yCat.2294....0A
g (AB) 12.263 [0.001] C 2009yCat.2294....0A
r (AB) 14.262 [0.01] C 2009yCat.2294....0A
i (AB) 13.454 [0.01] C 2009yCat.2294....0A
z (AB) 13.174 [0.013] D 2009yCat.2294....0A
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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!).

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (30) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HIP 101991 EM* RJHA 119 PM J20401-0052 2XMM J204009.0-005214
AN 342.1931 EM* CDS 1178 1RXS J204009.4-005216 [BM83] X2037-010
ASAS J204009-0052.2 1ES 2037-01.0 SBC7 826 [FS2003] 1085
1AXG J204011-0052 GCRV 71273 SBC9 1254 AAVSO 2035-01
CSI-01-20376 GSC 05177-00636 SDSS J204009.16-005215.0 Gaia DR1 4226332447299604352
1E 2037.5-0102 HIC 101991 TYC 5177-636-1 Gaia DR2 4226332451596335616
2E 4404 2MASS J20400915-0052151 V* AE Aqr
2E 2037.5-0102 PLX 4923.01 WEB 18437

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References (611 between 1850 and 2020) (Total 611)
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 : 1    velocities : 6    PM : 3    PLX : 5    MK : 3    V* : 2   

   

Observing logs


ISO : 4    XMM : 2    IUE : 49   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : V* AE Aqr

Link by name to the catalogue in VizieR :

HIP 101991 2E 4404 GSC 05177-00636 HIC 101991 2MASS J20400915-0052151
1RXS J204009.4-005216 SDSS J204009.16-005215.0 TYC 5177-636-1 V* AE Aqr Gaia DR1 4226332447299604352
Gaia DR2 4226332451596335616

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2020.10.24-17:53:47

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