New Online Database of Symbiotic Variables: Hen 2-375

Constellation
Pavo

Equatorial coordinates
α = 18 18 09.031
δ = -57 11 13.545

Galactic coordinates
l = 337.3094°
b = -18.2659°

Suspected	2013^Ref
Confirmed	2013^Ref
Symbiotic IR type	D^Ref
Hot component type	shell-burning^Ref
Outbursts	-

Identifiers

Hen 2-375	IRAS 18138-5712	GSC2.4.2 SAU9000093	AAVSO -
SIMBAD WRAY 16-400	Pan-STARRS -	SAO -	VSX 305986
GAIA DR3 6649005065254270208	SkyMapper 181809.02-571113.4	WRAY 16-400	GCVS -
2MASS J18180903-5711133	HIP -	Hen 2-375	BD -
WISE J181809.02-571113.3	TYC 8752-1529-1	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	-
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	Hen 2-375 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	274.5376^Ref	Parallax (mas)	0.111±0.078^Ref	Reddening E(B-V) (mag)	0.1±0.0^Ref ^{, Note}
Declination (°)	-57.1871^Ref	Distance (kpc)	5.63^Ref ^{, Note}, 5.16^Ref ^{, Note}
Galactic longitude (°)	337.3094^Ref	Proper motion in α (mas/yr)	1.31±0.08^Ref
Galactic latitude (°)	-18.2659^Ref	Proper motion in δ (mas/yr)	-5.46±0.07^Ref

Observations

X-Ray	-	IR type	D^Ref	Radio	No^Ref
X-Ray type	-	J (mag)	11.42^Ref	Flickering	No^Ref
GALEX FUV (mag)	-	H (mag)	10.41^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	8.88^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	6.42^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	4.63^Ref	Resolved nebula	Yes^Ref
U (mag)	-	WISE W3 (mag)	1.33^Ref	IPmax (eV)	114^Ref
B (mag)	12.41^Ref	WISE W4 (mag)	-0.33^Ref	[O III] lines	Yes^Ref
V (mag)	11.69^Ref	IRAS 12μm (Jy)	9.12^Ref	He II lines	Yes^Ref
R (mag)	-	IRAS 25μm (Jy)	13.50^Ref	[Fe VII] lines	Yes^Ref
I (mag)	-	IRAS 60μm (Jy)	5.44^Ref	O VI lines	Yes^Ref
BP (mag)	11.76^Ref	IRAS 100μm (Jy)	2.53^Ref
G (mag)	11.83^Ref	AKARI S09 (Jy)	6.40^Ref
RP (mag)	11.54^Ref	AKARI S18 (Jy)	9.81^Ref

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	shell-burning^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	114000^Ref
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

The spectrum unequivocally establishes Hen 2-375 as a D-type symbiotic star, with both O VI Raman features detected amidst a rich emission-line spectrum, as documented in Miszalski et al. (2013).

References

Merc, J., Beck, P. G., Mathur, S. et al., 2023, arXiv, arXiv:2312.16126, 2023arXiv231216126M
Miszalski, B., Mikołajewska, J., Udalski, A., 2013, MNRAS, 432, 4, 3186, 2013MNRAS.432.3186M

Hen 2-375