M31SyS J004334.79+413447.9

CONFIRMED M31   Equatorial coordinates α =  10.894874 ± 0.751300 | 00 43 34.769677 δ =  41.579937 ± 0.561100 | +41 34 47.774896   Constellation Andromeda Symbiotic IR Type S Spectral Type M Magnitude range (V)   Outbursts No

---

Identifiers

M31SyS J004334.79+413447.9	GSC –	TYC –	WRAY –
SIMBAD  M31SyS J004334.79+413447.9	HIP –	SAO –	Hen –
BD –	IRAS –	GAIA DR2 381295106209354880	ESO –
HD –	2MASS –	WISE –	AAVSO –

---

Position

Right ascension (°)	10.894874 ± 0.751300refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	Parallax (mas)	–	Reddening E(B-V) (mag)	0.250 ± 0.015refSchlafly, E. F., Finkbeiner, D. P., 2011, ApJ, 737, 103, 2011ApJ…737..103S
Declination (°)	41.579937 ± 0.561100refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	Distance (kpc)	785.00 ± 25.00refMcConnachie, A. W., Irwin, M. J., Ferguson, A. M. N., et al., 2005, MNRAS, 356, 979, 2005MNRAS.356..979M
Galactic longitude (°)	121.355045 ± 0.561100refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	Proper motion in α (mas/yr)	–
Galactic latitude (°)	-21.267751 ± 0.751300refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	Proper motion in δ (mas/yr)	–

---

Observations

U (mag)	20.63refMikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M	X-Ray		Flickering
B (mag)	21.30refMikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M	X-Ray type		Outbursts	No
V (mag)	20.91refMikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M	IUE	No	Type
R (mag)		IRAS flux at 12 μm (Jy)		IPmax (eV)	41.0refMikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M
I (mag)	19.56refMikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M	IRAS flux at 25 μm (Jy)		OVI lines	NorefMikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M
G (mag)	20.39refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	IRAS flux at 60 μm (Jy)
J (mag)		IRAS flux at 100 μm (Jy)
H (mag)		WISE W1 (mag)
K (mag)		WISE W2 (mag)
L (mag)		WISE W3 (mag)
		WISE W4 (mag)
		Radio
		Radio flux (mJy)

---

Orbit

Orbital period (days)	∼260?refMikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M	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
Ephemeris type				Mass ratio
Ephemeris T0 (JD)

---

Cool component

Spectral type	MrefMikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M	Mass (M⊙)		Pulsation	Yes?refVilardell, F., Ribas, I., Jordi, C., 2006, A&A, 459, 321, 2006A&A…459..321V
Eff. temperature (K)		Radius (R⊙)		Type	Low-amplitude SR pulsations?refVilardell, F., Ribas, I., Jordi, C., 2006, A&A, 459, 321, 2006A&A…459..321V
IR type	SrefMikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M	Luminosity (L⊙)		Pulsation period (days)	∼83?refVilardell, F., Ribas, I., Jordi, C., 2006, A&A, 459, 321, 2006A&A…459..321V
Metallicity [Fe/H]				Ephemeris type
				Ephemeris T0 (JD)

---

Hot component

Type/Spectra		Mass (M⊙)		Spin period (min)
Eff. temperature (K)		Radius (R⊙)		Accretion disk
Lower limit (K)	41000refMikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M	Luminosity (L⊙)
Upper limit (K)

---

Links

SIMBAD     CDS Portal

---

Notes

There is a red variable, [PAC] 46291, with P ∼260 d, which couldbe the same object (Mikołajewska et al., 2014).

---

References

• Mikołajewska, J., Caldwell, N., Shara, M. M., 2014, MNRAS, 444, 586, 2014MNRAS.444..586M

Last updated: Jan 12, 2019 @ 3:54 pm