XTE J1858+034
POSSIBLE
MILKY WAY
Constellation
Aquila |
Equatorial coordinates
α = 18 58 43.633
δ = +03 26 05.390 |
Galactic coordinates
l = 36.8193°
b = -0.0534° |
| Suspected |
2021Ref |
| Confirmed |
- |
| Symbiotic IR type |
- |
| Hot component type |
accreting-only?Ref |
| Outbursts |
- |
|
|
Identifiers
| XTE J1858+034 |
IRAS - |
GSC2.4.2 N1OE095423 |
AAVSO - |
| SIMBAD - |
Pan-STARRS - |
SAO - |
VSX - |
| GAIA DR3 - |
SkyMapper - |
WRAY - |
GCVS - |
| 2MASS J18584365+0326050 |
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 (°) |
284.6818Ref |
Parallax (mas) |
- |
Reddening E(B-V) (mag) |
14.94±0.68Ref, Note |
| Declination (°) |
3.4348Ref |
Distance (kpc) |
10.9±1Ref
-, Note |
|
|
| Galactic longitude (°) |
36.8193Ref |
Proper motion in α (mas/yr) |
- |
|
|
| Galactic latitude (°) |
-0.0534Ref |
Proper motion in δ (mas/yr) |
- |
|
|
Observations
| X-Ray |
YesRef |
IR type |
- |
Radio |
- |
| X-Ray type |
γRef |
J (mag) |
16.12Ref |
Flickering |
- |
| GALEX FUV (mag) |
- |
H (mag) |
14.70Ref |
Outbursts |
- |
| GALEX NUV (mag) |
- |
K (mag) |
12.97Ref |
Outburst type |
- |
| IUE |
NoRef |
WISE W1 (mag) |
- |
Jets |
- |
| FUSE |
NoRef |
WISE W2 (mag) |
- |
Resolved nebula |
- |
| U (mag) |
- |
WISE W3 (mag) |
- |
IPmax (eV) |
- |
| B (mag) |
- |
WISE W4 (mag) |
- |
[O III] lines |
- |
| V (mag) |
- |
IRAS 12μm (Jy) |
- |
He II lines |
- |
| R (mag) |
- |
IRAS 25μm (Jy) |
- |
[Fe VII] lines |
- |
| I (mag) |
- |
IRAS 60μm (Jy) |
- |
O VI lines |
- |
| BP (mag) |
- |
IRAS 100μm (Jy) |
- |
|
|
| G (mag) |
- |
AKARI S09 (Jy) |
- |
|
|
| RP (mag) |
- |
AKARI S18 (Jy) |
- |
|
|
Orbit
| Orbital period (days) |
380Ref, 81Ref |
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 |
- |
| Eclipses |
- |
|
|
Mass ratio |
- |
| Orbital ephemeris |
- |
|
|
|
|
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] |
- |
|
|
Pulsation ephemeris |
- |
Hot component
| Type/Spectral type |
NSRef |
Mass (M⊙) |
- |
Spin period (min) |
3.6397Ref |
| Shell-burning/Accreting-only |
accreting-only?Ref |
Radius (R⊙) |
- |
Accretion disk |
- |
| Eff. temperature (K) |
- |
Luminosity (L⊙) |
- |
|
|
| Lower limit (K) |
- |
|
|
|
|
| Upper limit (K) |
- |
|
|
|
|
Notes
The optical counterpart to the X-ray pulsar was initially considered to be a Be star; however, this classification was refuted by Tsygankov et al. (2021). Instead, a K-M giant was identified as the companion. The star experienced an X-ray outburst in 2019 (Tsygankov et al., 2021).
References
- Doroshenko, V. A., Doroshenko, R. F., Postnov, K. A. et al., 2008, ARep, 52, 2, 138, 2008ARep...52..138D
- Malacaria, C., Kretschmar, P., Madsen, K. K. et al., 2021, ApJ, 909, 2, 153, 2021ApJ...909..153M
- Tsygankov, S. S., Lutovinov, A. A., Molkov, S. V. et al., 2021, ApJ, 909, 2, 154, 2021ApJ...909..154T
Last updated: April 12, 2021