V503 Her
POSSIBLE
MILKY WAY
Constellation
Hercules |
Equatorial coordinates
α = 17 36 40.454
δ = +23 18 11.604 |
Galactic coordinates
l = 46.9914°
b = 26.2525° |
| Suspected |
1986Ref |
| Confirmed |
- |
| Symbiotic IR type |
S?Ref |
| Hot component type |
- |
| Outbursts |
- |
|
|
Symbiotic Catalogs
| Bidelman (1954) |
- |
Allen (1984) |
- |
Belzcyński et al. (2001) |
V503 Her (Susp.) |
| Gaposchkin (1957) |
- |
Kenyon (1986) |
V503 Her (Susp.) |
Akras et al. (2019) |
V503 Her (Susp.) |
| Boyarchuk (1969) |
- |
Vaidis (1988, 1991) |
V503 Her (Conf.) |
Position
| Right ascension (°) |
264.1686Ref |
Parallax (mas) |
0.077±0.014Ref |
Reddening E(B-V) (mag) |
0.07±0.0Ref, Note |
| Declination (°) |
23.3032Ref |
Distance (kpc) |
10.53Ref, Note, 10.58Ref, Note |
|
|
| Galactic longitude (°) |
46.9914Ref |
Proper motion in α (mas/yr) |
-2.94±0.01Ref |
|
|
| Galactic latitude (°) |
26.2525Ref |
Proper motion in δ (mas/yr) |
-4.42±0.01Ref |
|
|
Observations
| X-Ray |
NoRef |
IR type |
S?Ref |
Radio |
- |
| X-Ray type |
- |
J (mag) |
10.24Ref |
Flickering |
- |
| GALEX FUV (mag) |
- |
H (mag) |
9.76Ref |
Outbursts |
- |
| GALEX NUV (mag) |
20.44Ref |
K (mag) |
9.57Ref |
Outburst type |
- |
| IUE |
NoRef |
WISE W1 (mag) |
9.47Ref |
Jets |
- |
| FUSE |
NoRef |
WISE W2 (mag) |
9.10Ref |
Resolved nebula |
NoRef |
| U (mag) |
- |
WISE W3 (mag) |
8.50Ref |
IPmax (eV) |
- |
| B (mag) |
13.62Ref |
WISE W4 (mag) |
8.03Ref |
[O III] lines |
- |
| V (mag) |
12.30Ref |
IRAS 12μm (Jy) |
- |
He II lines |
- |
| R (mag) |
- |
IRAS 25μm (Jy) |
- |
[Fe VII] lines |
- |
| I (mag) |
- |
IRAS 60μm (Jy) |
- |
O VI lines |
- |
| BP (mag) |
12.77Ref |
IRAS 100μm (Jy) |
- |
|
|
| G (mag) |
12.05Ref |
AKARI S09 (Jy) |
- |
|
|
| RP (mag) |
11.20Ref |
AKARI S18 (Jy) |
- |
|
|
Orbit
| Orbital period (days) |
1575Ref |
γ velocity (km/h) |
-314.09±0.92Ref |
Size of giant’s orbit (AU) |
- |
| Eccentricity |
- |
RV of giant (km/h) |
- |
Separation (AU) |
- |
| Inclination (°) |
- |
Inferior conj. of giant (JD) |
- |
Mass function |
- |
| Eclipses |
YesRef |
|
|
Mass ratio |
- |
| Orbital ephemeris |
Min (V) = 2453145 + 1575±- x ERef |
|
|
|
|
Cool component
| Spectral type |
M2Ref, K2-3Ref |
Mass (M⊙) |
- |
Pulsation |
YesRef |
| Eff. temperature (K) |
4500±50Ref |
Radius (R⊙) |
- |
Type |
multiperiodic SRRef |
| IR type |
S?Ref |
Luminosity (L⊙) |
- |
Pulsation period (days) |
149.1+171.7Ref |
| 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
The spectrum of this object displays TiO bands typical for M-type stars and an excess in the UV part, as reported by Bond (1978). It was listed as a possible symbiotic star in Kenyon (1986). The suggestion of it being an eclipsing system was made by Gromadzki et al. (2013). However, a study of Merc et al. (2023) revealed that it is not an eclipsing binary, and there is no strong evidence for the symbiotic nature of the star. The optically detected K-type bright giant in the system exhibits multiperiod pulsations.
References
- Bond, H. E., 1978, PASP, 90, 526, 1978PASP...90..526B
- Gromadzki, M., Mikołajewska, J., Soszyński, I., 2013, AcA, 63, 4, 405, 2013AcA....63..405G
- Kenyon, S. J., 1986, Cambridge: University Press, 1, 1986syst.book.....K
- Merc, J., Gális, R., Wolf, M. et al., 2023, AJ, 166, 2, 65, 2023AJ....166...65M
Last updated: January 13, 2024