New Online Database of Symbiotic Variables: Gaia18aen

Constellation
Puppis

Equatorial coordinates
α = 08 02 52.058
δ = -30 18 37.128

Galactic coordinates
l = 247.6741°
b = 0.3140°

Suspected	2020^Ref
Confirmed	2020^Ref
Symbiotic IR type	S^Ref
Hot component type	shell-burning^Ref
Outbursts	Yes^Ref - Z And^Ref

Identifiers

Gaia18aen	IRAS -	GSC2.4.2 S64K095761	AAVSO 000-BMR-246
SIMBAD WRAY 15-136	Pan-STARRS 71621207168887856	SAO -	VSX 424655
GAIA DR3 5596273362288326912	SkyMapper 080252.06-301837.2	WRAY 15-136	GCVS -
2MASS J08025205-3018373	HIP -	Hen -	BD -
WISE J080252.06-301837.1	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 (°)	120.7169^Ref	Parallax (mas)	0.264±0.022^Ref	Reddening E(B-V) (mag)	0.98±0.03^Ref ^{, Note}
Declination (°)	-30.3103^Ref	Distance (kpc)	6^Ref 3.89^Ref ^{, Note}, 3.95^Ref ^{, Note}
Galactic longitude (°)	247.6741^Ref	Proper motion in α (mas/yr)	-1.77±0.02^Ref
Galactic latitude (°)	0.3140^Ref	Proper motion in δ (mas/yr)	4.25±0.02^Ref

Observations

X-Ray	No^Ref	IR type	S^Ref	Radio	-
X-Ray type	-	J (mag)	8.52^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	7.19^Ref	Outbursts	Yes^Ref
GALEX NUV (mag)	-	K (mag)	6.68^Ref	Outburst type	Z And^Ref
IUE	No^Ref	WISE W1 (mag)	6.39^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	6.24^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	6.13^Ref	IPmax (eV)	114^Ref
B (mag)	15.91^Ref	WISE W4 (mag)	5.88^Ref	[O III] lines	Yes^Ref
V (mag)	14.20^Ref	IRAS 12μm (Jy)	-	He II lines	Yes^Ref
R (mag)	14.10^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	Yes^Ref
I (mag)	14.10^Ref	IRAS 60μm (Jy)	-	O VI lines	Yes^Ref
BP (mag)	14.47^Ref	IRAS 100μm (Jy)	-
G (mag)	12.42^Ref	AKARI S09 (Jy)	0.22^Ref
RP (mag)	11.09^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	486.9±3.9^Ref	γ velocity (km/h)	98.60±0.39^Ref	Size of giant’s orbit (AU)	-
Eccentricity	-	RV of giant (km/h)	-	Separation (AU)	1.5 - 1.7^Ref
Inclination (°)	-	Inferior conj. of giant (JD)	-	Mass function	-
Eclipses	No^Ref			Mass ratio	-
Orbital ephemeris	Min (I) = 2457349.4±8.3 + 486.9±3.9 x E^Ref

Cool component

Spectral type	M^Ref	Mass (M_⊙)	-	Pulsation	Yes?^Ref
Eff. temperature (K)	3500^Ref	Radius (R_⊙)	230^Ref	Type	SR or OGLE Small Amplitude Red Giant?^Ref
IR type	S^Ref	Luminosity (L_⊙)	7400^Ref	Pulsation period (days)	-
Metallicity [Fe/H]	0.25^Ref			Pulsation ephemeris	-

Hot component

Type/Spectral type	WD^Ref	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	shell-burning^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	5200-29600^Ref
Lower limit (K)	114000^Ref
Upper limit (K)	155000^Ref

Links

SIMBAD CDS Portal

Notes

Detected in the outburst in 2018. Subsequent spectroscopic and photometric observations presented by Merc et al. (2020) confirmed the object to be the first-ever symbiotic star discovered by the Gaia satellite.

References

Merc, J., Mikołajewska, J., Gromadzki, M. et al., 2020, A&A, 644, A49, 2020A&A...644A..49M

Gaia18aen