XMMU J171919.8+575943
POSSIBLE
DRACO DWARF
Constellation
Draco |
Equatorial coordinates
α = 17 19 19.995
δ = +57 59 43.105 |
Galactic coordinates
l = 86.4740°
b = 34.8323° |
| Suspected |
2019Ref |
| Confirmed |
- |
| Symbiotic IR type |
S?Ref |
| Hot component type |
- |
| Outbursts |
- |
|
|
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 (°) |
259.8333Ref |
Parallax (mas) |
0.002±0.097Ref |
Reddening E(B-V) (mag) |
0.02±0.0Ref, Note |
| Declination (°) |
57.9953Ref |
Distance (kpc) |
80±10Ref
5.95Ref, Note, 7.94Ref, Note |
|
|
| Galactic longitude (°) |
86.4740Ref |
Proper motion in α (mas/yr) |
0.10±0.12Ref |
|
|
| Galactic latitude (°) |
34.8323Ref |
Proper motion in δ (mas/yr) |
-0.40±0.13Ref |
|
|
Observations
| X-Ray |
YesRef |
IR type |
S?Ref |
Radio |
YesRef |
| X-Ray type |
δRef |
J (mag) |
16.54Ref |
Flickering |
- |
| GALEX FUV (mag) |
- |
H (mag) |
15.74Ref |
Outbursts |
- |
| GALEX NUV (mag) |
- |
K (mag) |
15.78Ref |
Outburst type |
- |
| IUE |
NoRef |
WISE W1 (mag) |
15.24Ref |
Jets |
- |
| FUSE |
NoRef |
WISE W2 (mag) |
15.07Ref |
Resolved nebula |
- |
| U (mag) |
- |
WISE W3 (mag) |
12.24Ref |
IPmax (eV) |
- |
| B (mag) |
19.04Ref |
WISE W4 (mag) |
9.14Ref |
[O III] lines |
- |
| V (mag) |
18.41Ref |
IRAS 12μm (Jy) |
- |
He II lines |
- |
| R (mag) |
17.73Ref |
IRAS 25μm (Jy) |
- |
[Fe VII] lines |
- |
| I (mag) |
17.15Ref |
IRAS 60μm (Jy) |
- |
O VI lines |
- |
| BP (mag) |
18.66Ref |
IRAS 100μm (Jy) |
- |
|
|
| G (mag) |
18.05Ref |
AKARI S09 (Jy) |
- |
|
|
| RP (mag) |
17.36Ref |
AKARI S18 (Jy) |
- |
|
|
Orbit
| Orbital period (days) |
- |
γ velocity (km/h) |
-306.59Ref |
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 |
- |
Mass (M⊙) |
- |
Pulsation |
- |
| Eff. temperature (K) |
4660Ref |
Radius (R⊙) |
- |
Type |
- |
| IR type |
S?Ref |
Luminosity (L⊙) |
- |
Pulsation period (days) |
- |
| Metallicity [Fe/H] |
-2.12Ref |
|
|
Pulsation ephemeris |
- |
Hot component
| Type/Spectral type |
- |
Mass (M⊙) |
- |
Spin period (min) |
- |
| Shell-burning/Accreting-only |
- |
Radius (R⊙) |
- |
Accretion disk |
- |
| Eff. temperature (K) |
- |
Luminosity (L⊙) |
- |
|
|
| Lower limit (K) |
- |
|
|
|
|
| Upper limit (K) |
- |
|
|
|
|
Notes
This X-ray source was identified as a symbiotic binary by Saeedi et al. (2019), who discovered a bright optical/infrared counterpart of the object observed by XMM-Newton.
References
- Kirby, E. N., Guhathakurta, P., Simon, J. D. et al., 2010, ApJS, 191, 2, 352, 2010ApJS..191..352K
- Saeedi, S., Sasaki, M., Stelzer, B. et al., 2019, A&A, 627, A128, 2019A&A...627A.128S
Last updated: June 11, 2019