LW Cas
SUSPECTED
MILKY WAY
Constellation
Cassiopeia |
Equatorial coordinates
α = 02 57 21.588
δ = +60 41 19.661 |
Galactic coordinates
l = 137.7491°
b = 1.4919° |
| Suspected |
1953Ref |
| Confirmed |
- |
| Symbiotic IR type |
D'?Ref |
| Hot component type |
- |
| Outbursts |
YesRef - SyN?Ref |
|
|
Symbiotic Catalogs
| Bidelman (1954) |
- |
Allen (1984) |
- |
Belzcyński et al. (2001) |
- |
| Gaposchkin (1957) |
- |
Kenyon (1986) |
LW Cas (Susp.) |
Akras et al. (2019) |
- |
| Boyarchuk (1969) |
- |
Vaidis (1988, 1991) |
LW Cas (Conf.) |
Position
| Right ascension (°) |
44.3400Ref |
Parallax (mas) |
0.352±0.148Ref |
Reddening E(B-V) (mag) |
6.43±1.24Ref, Note |
| Declination (°) |
60.6888Ref |
Distance (kpc) |
3.84Ref, Note, 2.69Ref, Note |
|
|
| Galactic longitude (°) |
137.7491Ref |
Proper motion in α (mas/yr) |
-0.70±0.13Ref |
|
|
| Galactic latitude (°) |
1.4919Ref |
Proper motion in δ (mas/yr) |
-0.05±0.12Ref |
|
|
Observations
| X-Ray |
NoRef |
IR type |
D'?Ref |
Radio |
- |
| X-Ray type |
- |
J (mag) |
12.49Ref |
Flickering |
- |
| GALEX FUV (mag) |
- |
H (mag) |
11.09Ref |
Outbursts |
YesRef |
| GALEX NUV (mag) |
- |
K (mag) |
10.03Ref |
Outburst type |
SyN?Ref |
| IUE |
NoRef |
WISE W1 (mag) |
9.13Ref |
Jets |
- |
| FUSE |
NoRef |
WISE W2 (mag) |
8.24Ref |
Resolved nebula |
- |
| U (mag) |
- |
WISE W3 (mag) |
6.19Ref |
IPmax (eV) |
- |
| B (mag) |
- |
WISE W4 (mag) |
3.18Ref |
[O III] lines |
- |
| V (mag) |
- |
IRAS 12μm (Jy) |
2.27Ref |
He II lines |
- |
| R (mag) |
- |
IRAS 25μm (Jy) |
1.32Ref |
[Fe VII] lines |
- |
| I (mag) |
- |
IRAS 60μm (Jy) |
47.80Ref |
O VI lines |
- |
| BP (mag) |
18.07Ref |
IRAS 100μm (Jy) |
902.00Ref |
|
|
| G (mag) |
17.32Ref |
AKARI S09 (Jy) |
- |
|
|
| RP (mag) |
15.50Ref |
AKARI S18 (Jy) |
- |
|
|
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 |
- |
| Eclipses |
- |
|
|
Mass ratio |
- |
| Orbital ephemeris |
- |
|
|
|
|
Cool component
| Spectral type |
- |
Mass (M⊙) |
- |
Pulsation |
- |
| Eff. temperature (K) |
- |
Radius (R⊙) |
- |
Type |
- |
| IR type |
D'?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 |
- |
Radius (R⊙) |
- |
Accretion disk |
- |
| Eff. temperature (K) |
- |
Luminosity (L⊙) |
- |
|
|
| Lower limit (K) |
- |
|
|
|
|
| Upper limit (K) |
- |
|
|
|
|
Notes
Included in the list of suspected symbiotic stars in the Kenyon (1986) and classified as a confirmed symbiotic star in Vaidis (1988). In 1953, the star was detected in a 5-magnitude nova-like (slow nova?) outburst. It is possibly an A0III star (Cohen, 1980) and classified as a FU Ori type object according to Wenzel & Fuhrmann (1983).
References
- Cohen, M., 1980, AJ, 85, 29, 1980AJ.....85...29C
- Goranskij, V. P., Barsukova, E. A., 2008, PZ, 28, 11, 11, 2008PZ.....28...11G
- Kenyon, S. J., 1986, Cambridge: University Press, 1, 1986syst.book.....K
- Kurochkin, N. E., 1953, PZ, 9, 402, 1953PZ......9..402K
- Vaidis, J.-P., 1988, BAFOE, 45, 13, 1988BAFOE..45...13V
- Wenzel, W., Fuhrmann, B., 1983, MitVS, 9, 143, 1983MitVS...9..143W
Last updated: March 17, 2022