SMC3

CONFIRMED SMC  

Equatorial coordinates
α =  12.083424 ± 0.026503 | 00 48 20.019535
δ =  -73.531137 ± 0.021496 | -73 31 52.073759
 
Constellation Tucana
Symbiotic IR Type S🡕
Spectral Type M0
Magnitude range (V) 14.8-15.4ref
Outbursts SyN?

Identifiers

SMC3 GSC TYC WRAY
SIMBAD NAME SMC Symbiotic star 3 HIP SAO Hen
BD – IRAS  GAIA DR2 4685877768887752960 ESO
HD 2MASS J00482000-7331521 WISE J004820.05-733152.0 AAVSO 000-BJP-582

Position

Right ascension (°) 12.083424 ± 0.026503ref  Parallax (mas) Reddening E(B-V) (mag) 0.239 ± 0.051ref
Declination (°) -73.531137 ± 0.021496ref Distance (kpc) 62.10 ± 1.90ref    
Galactic longitude (°) 303.235698 ± 0.021496ref Proper motion in α (mas/yr) 0.628144 ± 0.054347ref    
Galactic latitude (°) -43.595287 ± 0.026503ref Proper motion in δ (mas/yr) -1.232339 ± 0.041758ref    

Observations

U (mag) 16.66ref X-Ray Yesref Flickering  
B (mag) 16.23ref X-Ray type αref Outbursts Yesref
V (mag) 14.74ref IUE Yes Type SyN?ref
R (mag) 14.00ref IRAS flux at 12 μm (Jy)   IPmax (eV) 235.0ref
I (mag) 13.13ref IRAS flux at 25 μm (Jy)   OVI lines Yesref
G (mag) 14.45ref IRAS flux at 60 μm (Jy)      
J (mag) 11.94ref IRAS flux at 100 μm (Jy)      
H (mag) 11.04ref WISE W1 (mag) 10.56ref    
K (mag) 10.80ref WISE W2 (mag) 10.63ref    
L (mag)   WISE W3 (mag) 10.22ref    
    WISE W4 (mag) 9.28ref    
    Radio      
    Radio flux (mJy)      

Orbit

Orbital period (days) 1634 ± 7ref γ velocity (km/h)   Size of giant’s orbit (AU)  
Eccentricity   RV of giant (km/h)   Separation (AU) 3.9ref
Inclination (°) >60ref
90ref
Inferior conj. of giant (JD)   Mass function  
Ephemeris type Min(X-ray)ref     Mass ratio  
Ephemeris T(JD) 2449382 ± 10ref        

Cool component

Spectral type M0 IIIref Mass (M) 0.8ref
2ref
3ref
Pulsation Yesref
Eff. temperature (K) 3700 ± 100ref Radius (R) 199-245ref
110ref
Type  
IR type S🡕, ref Luminosity (L)   Pulsation period (days) 110 ± 2ref
Metallicity [Fe/H]       Ephemeris type  
        Ephemeris T(JD)  

Hot component

Type/Spectra WDref Mass (M) 1.35ref
>1.18ref
1ref
0.8ref
Spin period (min)  
Eff. temperature (K) 439000-520000ref
100000-170000ref
Radius (R) 0.115ref Accretion disk  
Lower limit (K) 200000-300000ref Luminosity (L) 1200-3500ref
900ref
   
Upper limit (K)          

Links

SIMBAD     CDS Portal     VSX


Notes

The star is located in the line of sight to a cluster NGC 269. The WD appears to be very massive because SMC3 is one of the strongest X-ray sources among symbiotic binaries and shows unusually high ionization. The outburst of the system was observed between 1980 and 1981 (Morgan, 1992). According to the analysis of Kato et al. (2013), the giant almost fills its Roche lobe. 


References

Last updated: May 2, 2019 @ 11:29 am