M33SyS J013510.81+305146.8

CONFIRMED M33  

Equatorial coordinates
α =  23.794962 | 01 35 10.791000
δ =  30.862919 | +30 51 46.510000
 
Constellation Triangulum
Symbiotic IR Type  
Spectral Type M4, s-process enrichment
Magnitude range (V)  
Outbursts No

Identifiers

M33SyS J013510.81+305146.8 GSC TYC WRAY
SIMBAD M33SyS J013510.81+305146.8 HIP SAO Hen
BD – IRAS  GAIA DR2  ESO
HD 2MASS  WISE  AAVSO

Position

Right ascension (°) 23.794962ref Parallax (mas) Reddening E(B-V) (mag) 0.043 ± 0.002ref
Declination (°) 30.862919ref Distance (kpc) 847.00 ± 60.00ref    
Galactic longitude (°) 133.892161ref Proper motion in α (mas/yr)    
Galactic latitude (°) -31.076192ref Proper motion in δ (mas/yr)    

Observations

U (mag) 22.66ref X-Ray   Flickering  
B (mag) 23.29ref X-Ray type   Outbursts No
V (mag) 22.47ref IUE No Type  
R (mag) 21.14ref IRAS flux at 12 μm (Jy)   IPmax (eV) 54.4ref
I (mag) 20.29ref IRAS flux at 25 μm (Jy)   OVI lines Noref
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 M4, s-process enrichmentref Mass (M)   Pulsation Yesref
Eff. temperature (K)   Radius (R)   Type Low-amplitude SR pulsationsref
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) 54000ref Luminosity (L)      
Upper limit (K) 127000ref        

Links

SIMBAD     CDS Portal


Notes

M33SyS J013510.81+305146.8 show clearly detectable ZrO bands which indicates some s-process enrichment. Moreover, M33SyS J013510.81+305146.8 shows clear indication that its variability, especially in the g, r bands is presumably due to an orbital motion with low-amplitude SR pulsation of the red giant dominating in the i band (Mikołajewska et al., 2017).


References

  • Mikołajewska, J., Shara, M. M., Caldwell, N., et al., 2017, MNRAS, 465, 699, 2017MNRAS.465.1699M

Last updated: Jan 13, 2019 @ 1:05 pm