CXO J004318.8+412016

LIKELY M31
 
Constellation
Andromeda
Equatorial coordinates
α = 00 43 18.883
δ = +41 20 17.020
Galactic coordinates
l = 121.2931°
b = -21.5078°

Suspected 2014Ref
Confirmed -
Symbiotic IR type -
Hot component type shell-burning?Ref
Outbursts -

Identifiers

CXO J004318.8+412016 IRAS - GSC2.4.2 NBVE320376 AAVSO -
SIMBAD RX J004318.6+412024 Pan-STARRS - SAO - VSX -
GAIA DR3 - SkyMapper - WRAY - GCVS -
2MASS - HIP - Hen - BD -
WISE - TYC - ESO - HD -

Symbiotic Catalogs

Bidelman (1954) - Allen (1984) - Belzcyński et al. (2001) -
Gaposchkin (1957) - Kenyon (1986) - Akras et al. (2019) -
Boyarchuk (1969) - Vaidis (1988, 1991) -

Position

Right ascension (°) 10.8287Ref Parallax (mas) - Reddening E(B-V) (mag) 0.4±0.07Ref, Note
Declination (°) 41.3381Ref Distance (kpc) 785±25Ref
-, Note
   
Galactic longitude (°) 121.2931Ref Proper motion in α (mas/yr) -    
Galactic latitude (°) -21.5078Ref Proper motion in δ (mas/yr) -    

Observations

X-Ray YesRef IR type - Radio -
X-Ray type αRef J (mag) - Flickering -
GALEX FUV (mag) - H (mag) - Outbursts -
GALEX NUV (mag) - K (mag) - Outburst type -
IUE NoRef WISE W1 (mag) - Jets -
FUSE NoRef WISE W2 (mag) - Resolved nebula -
U (mag) 21.69Ref WISE W3 (mag) - IPmax (eV) 54.4Ref
B (mag) 23.13Ref WISE W4 (mag) - [O III] lines YesRef
V (mag) 22.43Ref IRAS 12μm (Jy) - He II lines YesRef
R (mag) 21.94Ref IRAS 25μm (Jy) - [Fe VII] lines NoRef
I (mag) 21.00Ref IRAS 60μm (Jy) - O VI lines NoRef
BP (mag) - IRAS 100μm (Jy) -
G (mag) - AKARI S09 (Jy) -
RP (mag) - AKARI S18 (Jy) -

Orbit

Orbital period (days) 230Ref γ velocity (km/h) - Size of giant’s orbit (AU) -
Eccentricity - RV of giant (km/h) - Separation (AU) -
Inclination (°) 0Ref Inferior conj. of giant (JD) - Mass function -
Eclipses -     Mass ratio 0.77Ref
Orbital ephemeris -        

Cool component

Spectral type K or earlierRef Mass (M) 1Ref Pulsation -
Eff. temperature (K) 4000Ref Radius (R) 80Ref Type -
IR type - Luminosity (L) - Pulsation period (days) -
Metallicity [Fe/H] -     Pulsation ephemeris -

Hot component

Type/Spectral type WD/BH?Ref Mass (M) 1.3Ref Spin period (min) -
Shell-burning/Accreting-only shell-burning?Ref Radius (R) - Accretion disk -
Eff. temperature (K) 775000Ref Luminosity (L) 61.3Ref    
Lower limit (K) -        
Upper limit (K) -        

Links

SIMBAD   CDS Portal


Notes

The possible symbiotic nature of this star was suggested by Chiosi et al. (2014). The continuum energy distribution and spectral characteristics demonstrate the presence of a red giant of K or earlier spectral type (Orio et al., 2017). CXO J004318.8+412016 has been observed in X-rays as a luminous supersoft source since 1979, with variable X-ray luminosity.


References


Last updated: January 12, 2019