1998A&AS..128..441V


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.26CEST06:31:54

1998A&AS..128..441V - Astron. Astrophys., Suppl. Ser., 128, 441-445 (1998/March-2)

AU Monocerotis-improved elements.

VIVEKANANDA RAO P. and SARMA M.B.K.

Abstract (from CDS):

From an analysis, using Wilson-Devinney method, of the corrected yellow light curve of the semi detached eclipsing binary system AU Monocerotis (AU Mon), obtained by Lorenzi (1980b), an improved value for the mass ratio, q, equal to 0.1985 and reliable geometrical elements were derived.They give the absolute elements as: mh/m=5.93±0.31; mc/m=1.18±0.16; Rh/R=5.28±0.16; Rc/R=10.04±0.74; Log Lh/L=3.16±0.14; LogLc/L=2.07±0.21; Loggh=3.76±0.06; and Loggc=2.51±0.02. When compared to main sequence stars of similar mass, the primary is found to have normal luminosity, bigger size and lower temperature while the secondary is found to have higher luminosity, bigger size and normal temperature for their masses. On the HR diagram of the normal main sequence stars, the primary is found to lie near but above the main sequence (brighter by 1.4mag). The secondary component is far above the main sequence and is overluminous by about 4.5mag.

Abstract Copyright:

Journal keyword(s): Binaries: eclipsing - stars: individual: AU Mon - stars: fundamental parameters

Status at CDS:  

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 50846 Al* 06 54 54.7083961175 -01 22 32.849416553   8.46 8.43     B5/7Ib 134 0

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2020.05.26CEST06:31:54

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


Basic data :
HD 50846 -- Eclipsing binary of Algol 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:
Al* (), * (HD,AG,...), SB* (SBC7,SBC9), V* (AN,V*), IR (2MASS), 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) :
06 54 54.7083961175 -01 22 32.849416553 (Optical) [ 0.0507 0.0485 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) :
06 52 22.4995920135 -01 18 40.410028956 [ 0.0507 0.0485 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) :
214.5523412751358 +00.1453988489014 [ 0.0507 0.0485 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 :
-1.389 -0.184 [0.100 0.086 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) 11.8 [0.9] / z(~) 0.000039 [0.000003] / cz 11.80 [0.90]
   A 1979IAUS...30...57E
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):
1.0832 [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:
B5/7Ib D 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 (6) :
B 8.46 [~] E ~
V 8.43 [~] E ~
G 8.2213 [0.0025] C 2018yCat.1345....0G
J 7.781 [0.026] C 2003yCat.2246....0C
H 7.559 [0.038] C 2003yCat.2246....0C
K 7.419 [0.026] C 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 (26) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 50846 GSC 04801-01012 SAO 133887 V* AU Mon
AG-01 858 HGAM 559 SBC7 294 WEB 6683
AN 41.1931 HIC 33237 SBC9 427 YZ 91 1909
BD-01 1449 HIP 33237 TD1 8514 Gaia DR2 3112305895950166784
CoRoT 156 LF 9 -02 348 TYC 4801-1012-1 Gaia DR1 3112305891648396928
GCRV 4526 2MASS J06545471-0122328 UBV 21596
GEN# +1.00050846 PPM 176531 uvby98 100050846

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References (134 between 1850 and 2020) (Total 134)
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 : 8    PM : 3    PLX : 3    MK : 2   

   

Observing logs


IUE : 112   

   


External archives :

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

Link by name to the catalogue in VizieR :

HD 50846 AG-01 858 BD-01 1449 CoRoT 156 GSC 04801-01012
HIC 33237 HIP 33237 LF 9 -02 348 2MASS J06545471-0122328 PPM 176531
SAO 133887 TD1 8514 TYC 4801-1012-1 uvby98 100050846 V* AU Mon
Gaia DR2 3112305895950166784 Gaia DR1 3112305891648396928

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2020.05.26-06:31:54

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