SMC N73

CONFIRMED SMC   Equatorial coordinates α =  16.163797 ± 0.022927 | 01 04 39.306394 δ =  -75.806885 ± 0.019812 | -75 48 24.765843   Constellation Hydrus Symbiotic IR Type S🡕 Source: Akras, S., Guzman-Ramirez, L., Leal-Ferreira, M. L., et al., 2019, ApJS, 240, 21, 2019ApJS..240…21A Spectral Type K7 Magnitude range (V)   Outbursts No

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Identifiers

SMC N73	GSC –	TYC –	WRAY –
SIMBAD LHA 115-N 73	HIP –	SAO –	Hen –
BD –	IRAS –	GAIA DR2 4636419124474360448	ESO –
HD –	2MASS J01043930-7548247	WISE  J010439.30-754824.7	AAVSO 000-BLT-630

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Position

Right ascension (°)	16.163797 ± 0.022927refGaia 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)	0.044 ± 0.001refSchlafly, E. F., Finkbeiner, D. P., 2011, ApJ, 737, 103, 2011ApJ…737..103S
Declination (°)	-75.806885 ± 0.019812refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	Distance (kpc)	62.10 ± 1.90refHilditch, R. W., Howarth, I. D., Harries, T. J., 2005, MNRAS, 357, 304, 2005MNRAS.357..304H
Galactic longitude (°)	301.854131 ± 0.019812refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	Proper motion in α (mas/yr)	1.158752 ± 0.041509refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G
Galactic latitude (°)	-41.293699 ± 0.022927refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	Proper motion in δ (mas/yr)	-1.352465 ± 0.037801refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G

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Observations

U (mag)		X-Ray	No	Flickering
B (mag)	17.30refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	X-Ray type		Outbursts	No
V (mag)	15.60refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	IUE	Yes	Type
R (mag)	15.52refZacharias, N., Finch, C., Girard, T., et al., 2009, VizieR Online Data Catalog: I/315, 2009yCat.1315….0Z	IRAS flux at 12 μm (Jy)		IPmax (eV)	114.0refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M
I (mag)	13.88refThe DENIS consortium, 2005, VizieR On-line Data Catalog: B/denis, 2005yCat.2263….0T	IRAS flux at 25 μm (Jy)		OVI lines	YesrefMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M
G (mag)	15.02refGaia 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)	15.55refCutri, R. M., Skrutskie, M. F., van Dyk, S., et al., 2003, VizieR On-line Data Catalog: II/246, 2003yCat.2246….0C	IRAS flux at 100 μm (Jy)
H (mag)	11.71refCutri, R. M., Skrutskie, M. F., van Dyk, S., et al., 2003, VizieR On-line Data Catalog: II/246, 2003yCat.2246….0C	WISE W1 (mag)	11.37refCutri, R. M., et al., 2014, I II/328, 2014yCat.2328….0C
K (mag)	11.49refCutri, R. M., Skrutskie, M. F., van Dyk, S., et al., 2003, VizieR On-line Data Catalog: II/246, 2003yCat.2246….0C	WISE W2 (mag)	11.46refCutri, R. M., et al., 2014, I II/328, 2014yCat.2328….0C
L (mag)		WISE W3 (mag)	11.27refCutri, R. M., et al., 2014, I II/328, 2014yCat.2328….0C
		WISE W4 (mag)	9.03refCutri, R. M., et al., 2014, I II/328, 2014yCat.2328….0C
		Radio
		Radio flux (mJy)

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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
Ephemeris type				Mass ratio
Ephemeris T0 (JD)

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Cool component

Spectral type	K7refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	Mass (M⊙)		Pulsation
Eff. temperature (K)	3850refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	Radius (R⊙)	150refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	Type
IR type	S🡕 Source: Akras, S., Guzman-Ramirez, L., Leal-Ferreira, M. L., et al., 2019, ApJS, 240, 21, 2019ApJS..240…21A, refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	Luminosity (L⊙)	4500refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	Pulsation period (days)
Metallicity [Fe/H]				Ephemeris type
				Ephemeris T0 (JD)

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Hot component

Type/Spectra		Mass (M⊙)		Spin period (min)
Eff. temperature (K)	130000 ± 10000refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	Radius (R⊙)	0.10refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	Accretion disk
Lower limit (K)		Luminosity (L⊙)	3000 ± 1000refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M
Upper limit (K)

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Links

SIMBAD     CDS Portal     VSX

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Notes

Proposed to be a symbiotic star based on a visibility of a strong UV continuum with TiO and a strong He II λ4686 emission line.

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References

• Morgan, D. H., 1992, MNRAS, 258, 639, 1992MNRAS.258..639M
• Muerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M
• Walker, A. R., 1983, MNRAS, 203, 25, 1983MNRAS.203…25W

Last updated: May 2, 2019 @ 11:27 am