1997A&AS..123..209D


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.09CEST12:47:51

1997A&AS..123..209D - Astron. Astrophys., Suppl. Ser., 123, 209-218 (1997/June-1)

A new radial velocity curve for the RS CVn star σ Gem. Constraints on its physical parameters.

DUEMMLER R., ILYIN I.V. and TUOMINEN I.

Abstract (from CDS):

26 high quality radial velocity measurements of the RS CVn star σ Gem taken in 1993, 1994, and 1995 are used in combination with older measurements to fit a new radial velocity curve. Essentially, the orbital parameters given by Bopp & Dempsey (1989PASP..101..516B) are confirmed. However, the orbit turns out to be circular. σ Gem is known as a single-lined binary, and also in the new spectra no trace of the secondary is found. However, combining the orbital with rotational parameters, constraints on the fundamental parameters can be found: the inclination, the radius and the two masses. The inclination is high; the mass of the primary seems to be normal for a K1 giant, its radius, however, seems to be too small.

Abstract Copyright:

Journal keyword(s): stars: spectroscopic - stars: fundamental parameters - binaries: stars individual: σ Gem

VizieR on-line data: <Available at CDS (J/A+AS/123/209): table1>

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 * sig Gem RS* 07 43 18.7269793 +28 53 00.642191 6.38 5.41 4.29 3.37 2.79 K1IIIe 453 0

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2021.05.09CEST12:47:51

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


Basic data :
* sig Gem -- Variable of RS CVn 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:
RS* (), * (*,AG,...), X (AT,2E,...), PM* (2018yCat,LSPM,...), IR (IRAS,IRC,...), UV (2EUVE,EUVE,...), SB* (CABS,CCABS,...), ** (CCDM,IDS,...), V* (V*), ev (2011ApJ), Rad (FIRST)
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) :
07 43 18.7269793 +28 53 00.642191 (Optical) [ 0.18 0.09 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) :
07 40 11.3812657 +29 00 22.566265 [ 0.18 0.09 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) :
191.1894273901 +23.2744800232 [ 0.18 0.09 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 :
62.66 -230.32 [0.24 0.14 90] 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) 44.15 [0.09] / z(~) 0.000147 [0.000000] / cz 44.15 [0.09]
   A 2004MNRAS.349.1069K
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):
26.08 [0.19] 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:
K1IIIe C 1989ApJS...71..245K
Syntax of angular size is : "maj-axis min-axis angle (wtype) quality bibcode"
  • maj-axis : major axis size (arc minutes)
  • min-axis : minor axis size (arc minutes)
  • angle : orientation angle (in degrees)
  • (wtype) : wavelength class for the origin of the angular size (Rad, mm, IR, Opt, UV, Xray, Gam)
  • quality : flag of quality of the angular size values ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the angular size reference
Angular size (arcmin):
0.0752 0.0678 59 (Rad) D 2012yCat.8090....0B
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 6.38 [~] C 2002yCat.2237....0D
B 5.41 [~] C 2002yCat.2237....0D
V 4.29 [~] C 2002yCat.2237....0D
R 3.37 [~] C 2002yCat.2237....0D
G 3.8578 [0.0089] C 2018yCat.1345....0G
I 2.79 [~] C 2002yCat.2237....0D
J 2.35 [~] C 2002yCat.2237....0D
H 1.799 [0.192] D 2003yCat.2246....0C
K 1.65 [~] C 2002yCat.2237....0D
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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 (60) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* sig Gem EUVE J0743+28.8 2MASS J07431872+2853009 SKY# 14262
* 75 Gem FIRST J074318.6+285302 NLTT 18323 SV* ZI 651
AG+29 890 GC 10373 PLX 1821 TD1 10768
ASCC 674632 GCRV 5136 PPM 97883 TIC 95286503
AT 0737+270 GEN# +1.00062044 RAFGL 1174 TYC 1924-2022-1
BD+29 1590 HD 62044 2RE J074317+285304 UBV 7398
CABS 73 HIC 37629 2RE J0743+285 UBV M 13527
CCABS 60 HIP 37629 RE J0743+285 USNO-B1.0 1188-00152360
CCDM J07433+2854A HR 2973 RE J074317+285303 uvby98 100062044
CMC 203994 IDS 07371+2907 A ROT 1245 V* sig Gem
CSI+29 1590 1 IRAS 07401+2900 RX J0743.3+2853 WDS J07433+2853A
2E 1861 IRC +30191 1RXS J074318.7+285306 WEB 7440
2E 0740.2+2900 JP11 1586 SAO 79638 YPAC 147
1ES 0740+29.0 LSPM J0743+2853 SBC7 319 YZ 29 4132
2EUVE J0743+28.8 LTT 12061 SBC9 470 Gaia DR2 878467085734742400

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References (453 between 1850 and 2021) (Total 453)
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 : 14    diameter : 1    distance : 1    ROT : 3    Fe_H : 6    PLX : 3    PM : 4    MK : 10   

   

Observing logs


IUE : 70    XMM : 1   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : * sig Gem

Link by name to the catalogue in VizieR :

AG+29 890 BD+29 1590 CABS 73 CCDM J07433+2854A 2E 1861
EUVE J0743+28.8 FIRST J074318.6+285302 HD 62044 HIC 37629 HIP 37629
HR 2973 IRAS 07401+2900 IRC +30191 LSPM J0743+2853 2MASS J07431872+2853009
NLTT 18323 PLX 1821 PPM 97883 RAFGL 1174 2RE J074317+285304
2RE J0743+285 1RXS J074318.7+285306 SAO 79638 TD1 10768 TYC 1924-2022-1
USNO-B1.0 1188-00152360 uvby98 100062044 V* sig Gem WDS J07433+2853A Gaia DR2 878467085734742400

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