LMC S154

CONFIRMED LMC  

Equatorial coordinates
α =  72.960290 ± 0.031358 | 04 51 50.460705
δ =  -75.059813 ± 0.028232 | -75 03 35.323709
 
Constellation Mensa
Symbiotic IR Type S+IR🡕
Spectral Type C2.2
Magnitude range (V) 13.9 – 17.3ref
Outbursts Yes

Identifiers

LMC S154 GSC TYC WRAY
SIMBAD LHA 120-S 154 HIP SAO Hen
BD – IRAS  GAIA DR2 4649246748682812032 ESO
HD 2MASS J04515046-7503353 WISE  J045150.46-750335.2 AAVSO 000-BCZ-119

Position

Right ascension (°) 72.960290 ± 0.031358ref  Parallax (mas) Reddening E(B-V) (mag) 0.111 ± 0.005ref
Declination (°) -75.059813 ± 0.028232ref Distance (kpc) 49.97 ± 0.19ref    
Galactic longitude (°) 287.347239 ± 0.031358ref  Proper motion in α (mas/yr) 2.238252 ± 0.072860ref    
Galactic latitude (°) -33.706855 ± 0.028232ref Proper motion in δ (mas/yr) -0.109439 ± 0.081071ref    

Observations

U (mag)   X-Ray Yesref,note Flickering  
B (mag) 12.80ref X-Ray type   Outbursts Yesref
V (mag) 15.70ref IUE Yes Type SyRNref
R (mag) 14.20ref IRAS flux at 12 μm (Jy)   IPmax (eV) 290.9ref
I (mag) 13.20ref IRAS flux at 25 μm (Jy)   OVI lines Yesref
G (mag) 15.37ref IRAS flux at 60 μm (Jy)      
J (mag) 11.71ref IRAS flux at 100 μm (Jy)      
H (mag) 10.36ref WISE W1 (mag) 8.64ref    
K (mag) 9.38ref WISE W2 (mag) 7.98ref    
L (mag) 8.27ref WISE W3 (mag) 6.78ref    
    WISE W4 (mag) 6.24ref    
    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 C2.2ref Mass (M) 2ref Pulsation Yesref
Eff. temperature (K) 4000 ± 250ref
3046ref
Radius (R) 400ref Type quasiperiodic pulsations of the giantref
IR type S+IR🡕, ref Luminosity (L) 12000ref
12300ref
Pulsation period (days) ~250ref
Metallicity [Fe/H]       Ephemeris type  
        Ephemeris T(JD)  

Hot component

Type/Spectra   Mass (M)   Spin period (min)  
Eff. temperature (K) 140000 ± 15000ref,note
125000-155000ref
291000refnote
Radius (R) 0.092ref Accretion disk  
Lower limit (K)   Luminosity (L) 3000 ± 1000ref
2000-4000ref
8300-23000ref
   
Upper limit (K)          

Links

SIMBAD     CDS Portal     VSX


Notes

The star changed its spectral appearance from a low excitation emission line object into that of a symbiotic star, probably due to optical thinning of the nebula (Remillard et al., 1992). Iłkiewicz et al. (2019) analyzed archival observations and classified the object as a symbiotic recurrent nova.


References

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