AT 2019qyl
LIKELY
NGC 300
Constellation
Sculptor |
Equatorial coordinates
α = 00 54 57.680
δ = -37 38 40.009 |
Galactic coordinates
l = 299.1171°
b = -79.4577° |
| Suspected |
2021Ref |
| Confirmed |
- |
| Symbiotic IR type |
- |
| Hot component type |
shell-burning?Ref |
| Outbursts |
YesRef - SyRN?Ref |
|
|
Identifiers
| AT 2019qyl |
IRAS - |
GSC2.4.2 S2SJ035994 |
AAVSO - |
| SIMBAD AT 2019qyl |
Pan-STARRS - |
SAO - |
VSX - |
| GAIA DR3 - |
SkyMapper - |
WRAY - |
GCVS - |
| 2MASS - |
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 (°) |
13.7403Ref |
Parallax (mas) |
- |
Reddening E(B-V) (mag) |
0.01±0.0Ref, Note |
| Declination (°) |
-37.6444Ref |
Distance (kpc) |
1860±70Ref
-, Note |
|
|
| Galactic longitude (°) |
299.1171Ref |
Proper motion in α (mas/yr) |
- |
|
|
| Galactic latitude (°) |
-79.4577Ref |
Proper motion in δ (mas/yr) |
- |
|
|
Observations
| X-Ray |
NoRef |
IR type |
- |
Radio |
- |
| X-Ray type |
- |
J (mag) |
- |
Flickering |
- |
| GALEX FUV (mag) |
- |
H (mag) |
- |
Outbursts |
YesRef |
| GALEX NUV (mag) |
- |
K (mag) |
- |
Outburst type |
SyRN?Ref |
| IUE |
NoRef |
WISE W1 (mag) |
- |
Jets |
- |
| FUSE |
NoRef |
WISE W2 (mag) |
- |
Resolved nebula |
- |
| U (mag) |
- |
WISE W3 (mag) |
- |
IPmax (eV) |
54.4Ref |
| B (mag) |
- |
WISE W4 (mag) |
- |
[O III] lines |
NoRef |
| V (mag) |
- |
IRAS 12μm (Jy) |
- |
He II lines |
YesRef |
| R (mag) |
- |
IRAS 25μm (Jy) |
- |
[Fe VII] lines |
NoRef |
| I (mag) |
- |
IRAS 60μm (Jy) |
- |
O VI lines |
NoRef |
| BP (mag) |
- |
IRAS 100μm (Jy) |
- |
|
|
| G (mag) |
- |
AKARI S09 (Jy) |
- |
|
|
| RP (mag) |
- |
AKARI S18 (Jy) |
- |
|
|
Orbit
| Orbital period (days) |
>1800Ref |
γ velocity (km/h) |
- |
Size of giant’s orbit (AU) |
- |
| Eccentricity |
- |
RV of giant (km/h) |
- |
Separation (AU) |
>4Ref |
| Inclination (°) |
- |
Inferior conj. of giant (JD) |
- |
Mass function |
- |
| Eclipses |
- |
|
|
Mass ratio |
1Ref |
| Orbital ephemeris |
- |
|
|
|
|
Cool component
| Spectral type |
M I-IIRef |
Mass (M⊙) |
1.2Ref |
Pulsation |
Yes?Ref |
| Eff. temperature (K) |
2500Ref |
Radius (R⊙) |
320Ref |
Type |
SR?Ref |
| IR type |
- |
Luminosity (L⊙) |
37000Ref |
Pulsation period (days) |
330?Ref |
| Metallicity [Fe/H] |
- |
|
|
Pulsation ephemeris |
- |
Hot component
| Type/Spectral type |
WDRef |
Mass (M⊙) |
>1.2Ref |
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
AT2019qyl experienced a rapidly evolving outburst in 2019, as documented in Jencson et al. (2021). The characteristics of the outburst are similar to those observed in symbiotic recurrent novae such as RS Oph or V407 Cyg. The system is suggested to have a symbiotic progenitor with an O-rich AGB donor star.
References
- Jencson, J. E., Andrews, J. E., Bond, H. E. et al., 2021, ApJ, 920, 2, 127, 2021ApJ...920..127J
Last updated: March 11, 2021