Sanduleak’s star

CONFIRMED LMC   Equatorial coordinates α =  86.331387 ± 0.084740 | 05 45 19.569000 δ =  -71.268560 ± 0.102012 |-71 16 06.720000   Constellation Mensa Symbiotic IR Type D’🡕 Source: Akras, S., Guzman-Ramirez, L., Leal-Ferreira, M. L., et al., 2019, ApJS, 240, 21, 2019ApJS..240…21A Spectral Type   Magnitude range (V)   Outbursts Yes?

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Identifiers

Sanduleak’s star	GSC –	TYC –	WRAY –
SIMBAD NAME Sanduleak’s Star	HIP –	SAO –	Hen –
BD –	IRAS Z05460-7117	GAIA DR2 4657015446868152320	ESO –
HD –	2MASS J05451956-7116067	WISE J054519.53-711606.7	AAVSO 000-BLT-635

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Position

Right ascension (°)	86.331387 ± 0.084740refGaia 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)	0.232 ± 0.022refSchlafly, E. F., Finkbeiner, D. P., 2011, ApJ, 737, 103, 2011ApJ…737..103S
Declination (°)	-71.268560 ± 0.102012refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	Distance (kpc)	49.97 ± 0.19refPietrzyński, G., Graczyk, D., Gieren, W., et al., 2013, Nature, 495, 76, 2013Natur.495…76P
Galactic longitude (°)	281.912253 ± 0.102012refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	Proper motion in α (mas/yr)	2.243883 ± 0.179659refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G
Galactic latitude (°)	-30.873125 ± 0.084740refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	Proper motion in δ (mas/yr)	0.751641 ± 0.205047refGaia 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)	16.86refZaritsky, D., Harris, J., Thompson, I. B., et al., 2004, AJ, 128, 1606, 2004AJ….128.1606Z	X-Ray	NorefAngeloni, R., Ferreira Lopes, C. E., Masetti, N., et al., 2014, MNRAS, 438, 35, 2014MNRAS.438…35A	Flickering
B (mag)	17.41refZaritsky, D., Harris, J., Thompson, I. B., et al., 2004, AJ, 128, 1606, 2004AJ….128.1606Z	X-Ray type		Outbursts	Yes?refAngeloni, R., Ferreira Lopes, C. E., Masetti, N., et al., 2014, MNRAS, 438, 35, 2014MNRAS.438…35A
V (mag)	17.06refZaritsky, D., Harris, J., Thompson, I. B., et al., 2004, AJ, 128, 1606, 2004AJ….128.1606Z	IUE	Yes	Type
R (mag)	15.69refFraser, O. J., Hawley, S. L., Cook, K. H., 2008, AJ, 136, 1242, 2008AJ….136.1242F	IRAS flux at 12 μm (Jy)	<0.1258refMoshir, M., Kopan, G., Conrow, T., et al., 2008, VizieR Online Data Catalog: II/275, 2008yCat.2275….0M	IPmax (eV)	114.0refHeo, J. E., Angeloni, R., Di Mille, F., et al., 2016, ApJ, 833, 286, 2016ApJ…833..286H
I (mag)	16.83refThe DENIS consortium, 2005, VizieR On-line Data Catalog: B/denis, 2005yCat.2263….0T	IRAS flux at 25 μm (Jy)	0.1151refMoshir, M., Kopan, G., Conrow, T., et al., 2008, VizieR Online Data Catalog: II/275, 2008yCat.2275….0M	OVI lines	YesrefHeo, J. E., Angeloni, R., Di Mille, F., et al., 2016, ApJ, 833, 286, 2016ApJ…833..286H
G (mag)	17.17refGaia Collaboration, Brown, A. G. A., Vallenari, A., et al., 2018, A&A, 616, A1, 2018A&A…616A…1G	IRAS flux at 60 μm (Jy)	<0.2748refMoshir, M., Kopan, G., Conrow, T., et al., 2008, VizieR Online Data Catalog: II/275, 2008yCat.2275….0M
J (mag)	15.92refCutri, 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)	<2.189refMoshir, M., Kopan, G., Conrow, T., et al., 2008, VizieR Online Data Catalog: II/275, 2008yCat.2275….0M
H (mag)	15.23refCutri, R. M., Skrutskie, M. F., van Dyk, S., et al., 2003, VizieR On-line Data Catalog: II/246, 2003yCat.2246….0C	WISE W1 (mag)	11.31refCutri, R. M., et al., 2014, I II/328, 2014yCat.2328….0C
K (mag)	13.01refCutri, R. M., Skrutskie, M. F., van Dyk, S., et al., 2003, VizieR On-line Data Catalog: II/246, 2003yCat.2246….0C	WISE W2 (mag)	9.79refCutri, R. M., et al., 2014, I II/328, 2014yCat.2328….0C
L (mag)		WISE W3 (mag)	6.96refCutri, R. M., et al., 2014, I II/328, 2014yCat.2328….0C
		WISE W4 (mag)	4.98refCutri, 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		Mass (M⊙)		Pulsation
Eff. temperature (K)	4276refAkras, S., Guzman-Ramirez, L., Leal-Ferreira, M. L., et al., 2019, ApJS, 240, 21, 2019ApJS..240…21A	Radius (R⊙)		Type
IR type	D’🡕 Source: Akras, S., Guzman-Ramirez, L., Leal-Ferreira, M. L., et al., 2019, ApJS, 240, 21, 2019ApJS..240…21A, refAkras, S., Guzman-Ramirez, L., Leal-Ferreira, M. L., et al., 2019, ApJS, 240, 21, 2019ApJS..240…21A	Luminosity (L⊙)		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 ± 30000refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	Radius (R⊙)	0.092refMuerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M	Accretion disk
Lower limit (K)		Luminosity (L⊙)	2400 ± 1200refMuerset, 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

Usually classified as a SySt, but no direct evidence exists in the optical to confirm the presence of the giant component. Angeloni et al. (2011) discovered a giant, 14 parsecs long, highly collimated jet from the star. For at least two decades, Sanduleak’s star has been monotonically fading at an apparently constant rate of ∼0.03 mag/yr in all bands (Angeloni et al., 2014).

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References

• Akras, S., Guzman-Ramirez, L., Leal-Ferreira, M. L., et al., 2019, ApJS, 240, 21, 2019ApJS..240…21A
• Allen, D. A., 1980, Astrophysical Letters, 20, 131, 1980ApL….20..131A
• Angeloni, R., Di Mille, F., Bland-Hawthorn, J., et al., 2011, ApJ, 743, L8, 2011ApJ…743L…8A
• Angeloni, R., Ferreira Lopes, C. E., Masetti, N., et al., 2014, MNRAS, 438, 35, 2014MNRAS.438…35A
• Heo, J. E., Angeloni, R., Di Mille, F., et al., 2016, ApJ, 833, 286, 2016ApJ…833..286H
• Muerset, U., Schild, H., Vogel, M., 1996, A&A, 307, 516, 1996A&A…307..516M
• Muerset, U., Wolff, B., Jordan, S., 1997, A&A, 319, 201, 1997A&A…319..201M
• Phillips, J. P., 2007, MNRAS, 376, 1120, 2007MNRAS.376.1120
• Sanduleak, N., 1977, Information Bulletin on Variable Stars, 1304, 1, 1977IBVS.1304….1S

Last updated: May 2, 2019 @ 11:25 am