M33SyS J013219.75+303731.7

CONFIRMED M33  

Equatorial coordinates
α =  23.082183 | 01 32 19.724000
δ =  30.625422 | +30 37 31.520000
 
Constellation Triangulum
Symbiotic IR Type  
Spectral Type K-M
Magnitude range (V)  
Outbursts No

Identifiers

M33SyS J013219.75+303731.7 GSC TYC WRAY
SIMBAD M33SyS J013219.75+303731.7 HIP SAO Hen
BD – IRAS  GAIA DR2  ESO
HD 2MASS  WISE  AAVSO

Position

Right ascension (°) 23.082183ref   Parallax (mas) Reddening E(B-V) (mag) 0.042 ± 0.001ref
Declination (°) 30.625422ref Distance (kpc) 847.00 ± 60.00ref    
Galactic longitude (°) 133.241884ref Proper motion in α (mas/yr)    
Galactic latitude (°) -31.426391ref Proper motion in δ (mas/yr)    

Observations

U (mag) 20.93ref X-Ray   Flickering  
B (mag) 21.57ref X-Ray type   Outbursts No
V (mag) 21.12ref IUE No Type  
R (mag) 20.29ref IRAS flux at 12 μm (Jy)   IPmax (eV) 114.0ref
I (mag) 19.64ref IRAS flux at 25 μm (Jy)   OVI lines Yesref
G (mag)   IRAS flux at 60 μm (Jy)      
J (mag)   IRAS flux at 100 μm (Jy)      
H (mag)   WISE W1 (mag)      
K (mag)   WISE W2 (mag)      
L (mag)   WISE W3 (mag)      
    WISE W4 (mag)      
    Radio      
    Radio flux (mJy)      

Orbit

Orbital period (days)   γ velocity (km/h)   Size of giant’s orbit (AU)  
Eccentricity   RV of giant (km/h)   Separation (AU)  
Inclination (°)   Inferior conj. of giant (JD)   Mass function  
Ephemeris type       Mass ratio  
Ephemeris T(JD)          

Cool component

Spectral type K-Mref Mass (M)   Pulsation  
Eff. temperature (K)   Radius (R)   Type  
IR type   Luminosity (L)   Pulsation period (days)  
Metallicity [Fe/H]       Ephemeris type  
        Ephemeris T(JD)  

Hot component

Type/Spectra   Mass (M)   Spin period (min)  
Eff. temperature (K)   Radius (R)   Accretion disk  
Lower limit (K) 114000ref Luminosity (L)      
Upper limit (K) 153000ref        

Links

SIMBAD     CDS Portal


Notes

It was initially classified as a Cepheid with a 23.11 day period by Hartman et al. (2006), but Mikołajewska et al. (2017) argued that light curves, as well as spectrum, are incompatible with such a classification. 


References

  • Hartman, J. D., Bersier, D., Stanek, K. Z., et al., 2006, MNRAS, 371, 1405, 2006MNRAS.371.1405H
  • Mikołajewska, J., Shara, M. M., Caldwell, N., et al., 2017, MNRAS, 465, 699, 2017MNRAS.465.1699M

Last updated: Jan 13, 2019 @ 11:58 am