VPHASDR2J175346.2-2848261.6
LIKELY
MILKY WAY
Constellation
Sagittarius |
Equatorial coordinates
α = 17 53 46.187
δ = -28 48 26.667 |
Galactic coordinates
l = 1.0272°
b = -1.4646° |
| Suspected |
2019Ref |
| Confirmed |
- |
| Symbiotic IR type |
S?Ref |
| Hot component type |
shell-burning?Ref |
| 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 (°) |
268.4424Ref |
Parallax (mas) |
0.072±0.037Ref |
Reddening E(B-V) (mag) |
1.66±0.16Ref, Note |
| Declination (°) |
-28.8074Ref |
Distance (kpc) |
7.33Ref, Note, 6.86Ref, Note |
|
|
| Galactic longitude (°) |
1.0272Ref |
Proper motion in α (mas/yr) |
-2.81±0.04Ref |
|
|
| Galactic latitude (°) |
-1.4646Ref |
Proper motion in δ (mas/yr) |
-0.33±0.03Ref |
|
|
Observations
| X-Ray |
NoRef |
IR type |
S?Ref |
Radio |
- |
| X-Ray type |
- |
J (mag) |
10.41Ref |
Flickering |
- |
| GALEX FUV (mag) |
- |
H (mag) |
9.30Ref |
Outbursts |
- |
| GALEX NUV (mag) |
- |
K (mag) |
8.79Ref |
Outburst type |
- |
| IUE |
NoRef |
WISE W1 (mag) |
8.44Ref |
Jets |
- |
| FUSE |
NoRef |
WISE W2 (mag) |
8.47Ref |
Resolved nebula |
- |
| U (mag) |
- |
WISE W3 (mag) |
7.92Ref |
IPmax (eV) |
35.1Ref |
| B (mag) |
- |
WISE W4 (mag) |
6.23Ref |
[O III] lines |
YesRef |
| V (mag) |
- |
IRAS 12μm (Jy) |
- |
He II lines |
NoRef |
| R (mag) |
- |
IRAS 25μm (Jy) |
- |
[Fe VII] lines |
NoRef |
| I (mag) |
- |
IRAS 60μm (Jy) |
- |
O VI lines |
NoRef |
| BP (mag) |
16.68Ref |
IRAS 100μm (Jy) |
- |
|
|
| G (mag) |
14.59Ref |
AKARI S09 (Jy) |
- |
|
|
| RP (mag) |
13.15Ref |
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 |
MRef |
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 |
shell-burning?Ref |
Radius (R⊙) |
- |
Accretion disk |
- |
| Eff. temperature (K) |
- |
Luminosity (L⊙) |
- |
|
|
| Lower limit (K) |
- |
|
|
|
|
| Upper limit (K) |
- |
|
|
|
|
Notes
Initially identified as a potential symbiotic star through a machine learning approach by Akras et al. (2019), recent spectroscopic observations by Akras et al. (2021) reveal that it does not entirely meet the symbiotic criteria, notably lacking He II emission lines.
References
- Akras, S., Gonçalves, D. R., Alvarez-Candal, A. et al., 2021, MNRAS, 502, 2, 2513, 2021MNRAS.502.2513A
- Akras, S., Leal-Ferreira, M. L., Guzman-Ramirez, L. et al., 2019, MNRAS, 483, 4, 5077, 2019MNRAS.483.5077A
Last updated: April 12, 2021