GaSS 1-4

LIKELY MILKY WAY
 
Constellation
Hydra
Equatorial coordinates
α = 11 12 15.481
δ = -32 07 19.242
Galactic coordinates
l = 279.6093°
b = 26.2191°

Suspected 2021Ref
Confirmed -
Symbiotic IR type S?Ref
Hot component type accreting-only?Ref
Outbursts -

Identifiers

GaSS 1-4 IRAS - GSC2.4.2 S5AY017432 AAVSO -
SIMBAD UCAC4 290-063256 Pan-STARRS - SAO - VSX 785968
GAIA DR3 5403474822973970816 SkyMapper 111215.48-320719.2 WRAY - GCVS -
2MASS J11121548-3207193 HIP - Hen - BD -
WISE J111215.47-320719.2 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 (°) 168.0645Ref Parallax (mas) 0.123±0.017Ref Reddening E(B-V) (mag) 0.1±0.0Ref, Note
Declination (°) -32.1220Ref Distance (kpc) 8.2Ref
7.23Ref, Note, 7.41Ref, Note
   
Galactic longitude (°) 279.6093Ref Proper motion in α (mas/yr) 1.01±0.01Ref    
Galactic latitude (°) 26.2191Ref Proper motion in δ (mas/yr) -1.95±0.01Ref    

Observations

X-Ray NoRef IR type S?Ref Radio -
X-Ray type - J (mag) 9.58Ref Flickering NoRef
GALEX FUV (mag) - H (mag) 8.67Ref Outbursts -
GALEX NUV (mag) - K (mag) 8.48Ref Outburst type -
IUE NoRef WISE W1 (mag) 8.37Ref Jets -
FUSE NoRef WISE W2 (mag) 8.43Ref Resolved nebula -
U (mag) - WISE W3 (mag) 8.30Ref IPmax (eV) 13.6Ref
B (mag) 14.42Ref WISE W4 (mag) 7.99Ref [O III] lines NoRef
V (mag) 12.64Ref IRAS 12μm (Jy) - He II lines NoRef
R (mag) 12.17Ref IRAS 25μm (Jy) - [Fe VII] lines NoRef
I (mag) - IRAS 60μm (Jy) - O VI lines NoRef
BP (mag) 12.89Ref IRAS 100μm (Jy) -
G (mag) 11.91Ref AKARI S09 (Jy) -
RP (mag) 10.93Ref AKARI S18 (Jy) -

Orbit

Orbital period (days) 458.92±4.25Ref γ velocity (km/h) 143.37±1.25Ref Size of giant’s orbit (AU) -
Eccentricity 0.06±0.04Ref RV of giant (km/h) - Separation (AU) -
Inclination (°) - Inferior conj. of giant (JD) - Mass function -
Eclipses -     Mass ratio -
Orbital ephemeris Min (V) = 2457065 + 235 x ERef        

Cool component

Spectral type M1Ref Mass (M) - Pulsation -
Eff. temperature (K) - Radius (R) - Type -
IR type S?Ref Luminosity (L) - Pulsation period (days) -
Metallicity [Fe/H] -     Pulsation ephemeris -

Hot component

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

Links

SIMBAD   CDS Portal


Notes

This candidate for the accreting-only symbiotic star was identified in the GALAH high-resolution spectroscopic survey (Munari et al., 2021). A reported orbital period of 459 days from Gaia data (Beck et al. (2023)), double in comparison with the period observed in photometry by Munari et al., 2021, suggests that the giant might be close to filling its Roche-lobe.


References

  • Beck, P. G., Grossmann, D. H., Steinwender, L. et al., 2023, arXiv, arXiv:2307.10812, 2023arXiv230710812B
  • Munari, U., Traven, G., Masetti, N. et al., 2021, MNRAS, 505, 4, 6121, 2021MNRAS.505.6121M


Last updated: January 12, 2024