XZ Tauri

XZ Tauri
	; A visual band light curve for XZ Tauri. The main plot shows the long-term variability, and the inset shows the year 2000 superflare on the north star. Adapted from Dodin et al. (2016) and Coffey et al. (2004).
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Taurus
Right ascension	04h 31m 40.08690s
Declination	+18° 13′ 56.6424″
Apparent magnitude (V)	10.40
Characteristics
Spectral type	M2.0 + M3.5
Astrometry
Proper motion (μ)	RA: 9.1 mas/yr ; Dec.: −17.8 mas/yr
Distance	460 ly ; (140 pc)
Orbit
Primary	A
Companion	B
Period (P)	155 yr
Semi-major axis (a)	0.172+0.002; −0.003″
Eccentricity (e)	0.742+0.025; −0.034
Inclination (i)	0.0°
Argument of periastron (ω); (secondary)	−42.2+2.0; −4.7°
Details
A
Mass	0.37 M☉
Radius	1.1 R☉
Luminosity	0.17 L☉
B
Mass	0.29 M☉
Radius	1.7 R☉
Luminosity	0.31 L☉
Temperature	3,550 K
Age	4.6 Myr
Other designations
	XZ Tau, GSC 01269-00171
Database references
SIMBAD	data

XZ Tauri is a binary system approximately 460 light-years away in the constellation Taurus. The system consists of two T Tauri stars orbiting each other about 6 billion kilometers apart (roughly the same distance as Pluto is from the Sun). The system made news in 2000 when a superflare was observed in the system.

A third star, component C, has been observed at a separation of 0.09″, but subsequent observations failed to find it.^[10]^[8] The T Tauri star HL Tauri, 23″ away, is also sometimes listed as a companion.^[9]

Gallery

Hubble image of XZ Tauri.^[11]
An animation of the 2000 superflare in the system.

Notes

^ ^a ^b Sources vary on their definitions of the primary and secondary components. A is defined here as the more massive component, with a lower temperature but higher luminosity. Other sources refer to the components as north and south,^[2] or Aa and Ab.^[9] The southerly star Ab is generally brighter at optical wavelengths and more massive, but is less luminous.

References

^ Dodin, A. V.; Emelyanov, N. V.; Zharova, A. V.; Lamzin, S. A.; Malogolovets, E. V.; Roe, J. M. (January 2016). "Orbital motions and light curves of young binaries XZ Tau and VY Tau". Astronomy Letters. 42 (1): 29–40. arXiv:1509.04966. Bibcode:2016AstL...42...29D. doi:10.1134/S1063773716010035. S2CID 118495210.
^ ^a ^b Coffey, D.; Downes, T. P.; Ray, T. P. (May 2004). "The evolution and simulation of the outburst from XZ Tauri – A possible EXor?". Astronomy and Astrophysics. 419 (2): 593–598. arXiv:astro-ph/0402635. Bibcode:2004A&A...419..593C. doi:10.1051/0004-6361:20034316. S2CID 17421498.
^ ^a ^b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
^ ^a ^b Hartigan, Patrick; Kenyon, Scott J. (January 2003). "A Spectroscopic Survey of Subarcsecond Binaries in the Taurus-Auriga Dark Cloud with the Hubble Space Telescope". The Astrophysical Journal. 583 (1): 334–357. arXiv:astro-ph/0209608. Bibcode:2003ApJ...583..334H. doi:10.1086/345293. S2CID 10433035.
^ ^a ^b Zacharias, N.; Urban, S. E.; Zacharias, M. I.; Wycoff, G. L.; Hall, D. M.; Germain, M. E.; Holdenried, E. R.; Winter, L. (2003). "UCAC2 Catalogue (Zacharias+ 2004)". Vizier Online Data Catalog. Bibcode:2003yCat.1289....0Z.
^ ^a ^b ^c Osorio, Mayra; et al. (July 2016). "A Dwarf Transitional Protoplanetary Disk around XZ Tau B". The Astrophysical Journal Letters. 825 (1): 6. arXiv:1606.03118. Bibcode:2016ApJ...825L..10O. doi:10.3847/2041-8205/825/1/L10. S2CID 59585588. L10.
^ ^a ^b Ichikawa, Takanori; Kido, Miyu; Takaishi, Daisuke; Shimajiri, Yoshito; Tsukamoto, Yusuke; Takakuwa, Shigehisa (2021). "Misaligned Circumstellar Disks and Orbital Motion of the Young Binary XZ Tau". The Astrophysical Journal. 919 (1): 55. arXiv:2106.11924. Bibcode:2021ApJ...919...55I. doi:10.3847/1538-4357/ac0dc3. S2CID 235593373.
^ ^a ^b ^c "XZ Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-09.
^ Osorio, Mayra; MacÍas, Enrique; Anglada, Guillem; Carrasco-González, Carlos; Galván-Madrid, Roberto; Zapata, Luis; Calvet, Nuria; Gómez, José F.; Nagel, Erick; Rodríguez, Luis F.; Torrelles, José M.; Zhu, Zhaohuan (2016). "A Dwarf Transitional Protoplanetary Disk Around Xz Tau B". The Astrophysical Journal. 825 (1): L10. arXiv:1606.03118. Bibcode:2016ApJ...825L..10O. doi:10.3847/2041-8205/825/1/L10. S2CID 59585588.
^ "Jets, bubbles, and bursts of light in Taurus". www.spacetelescope.org. ESA/Hubble. Retrieved 6 November 2014.

External links

"Movies from Hubble Show the Changing Faces of Infant Stars". HubbleSite. NASA. 21 September 2000. Retrieved 23 August 2009.
XZ Tauri at Constellation Guide

[components-10] Sources vary on their definitions of the primary and secondary components. A is defined here as the more massive component, with a lower temperature but higher luminosity. Other sources refer to the components as north and south,^[2] or Aa and Ab.^[9] The southerly star Ab is generally brighter at optical wavelengths and more massive, but is less luminous.

[Dodin2016-1] Dodin, A. V.; Emelyanov, N. V.; Zharova, A. V.; Lamzin, S. A.; Malogolovets, E. V.; Roe, J. M. (January 2016). "Orbital motions and light curves of young binaries XZ Tau and VY Tau". Astronomy Letters. 42 (1): 29–40. arXiv:1509.04966. Bibcode:2016AstL...42...29D. doi:10.1134/S1063773716010035. S2CID 118495210.

[Coffey2004-2] Coffey, D.; Downes, T. P.; Ray, T. P. (May 2004). "The evolution and simulation of the outburst from XZ Tauri – A possible EXor?". Astronomy and Astrophysics. 419 (2): 593–598. arXiv:astro-ph/0402635. Bibcode:2004A&A...419..593C. doi:10.1051/0004-6361:20034316. S2CID 17421498.

[GaiaDR2-3] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[Ducati-4] Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.

[Hartigan_Kenyon_2003-5] Hartigan, Patrick; Kenyon, Scott J. (January 2003). "A Spectroscopic Survey of Subarcsecond Binaries in the Taurus-Auriga Dark Cloud with the Hubble Space Telescope". The Astrophysical Journal. 583 (1): 334–357. arXiv:astro-ph/0209608. Bibcode:2003ApJ...583..334H. doi:10.1086/345293. S2CID 10433035.

[UCAC2-6] Zacharias, N.; Urban, S. E.; Zacharias, M. I.; Wycoff, G. L.; Hall, D. M.; Germain, M. E.; Holdenried, E. R.; Winter, L. (2003). "UCAC2 Catalogue (Zacharias+ 2004)". Vizier Online Data Catalog. Bibcode:2003yCat.1289....0Z.

[Osorio_et_al_2016-7] Osorio, Mayra; et al. (July 2016). "A Dwarf Transitional Protoplanetary Disk around XZ Tau B". The Astrophysical Journal Letters. 825 (1): 6. arXiv:1606.03118. Bibcode:2016ApJ...825L..10O. doi:10.3847/2041-8205/825/1/L10. S2CID 59585588. L10.

[ichikawa2021-8] Ichikawa, Takanori; Kido, Miyu; Takaishi, Daisuke; Shimajiri, Yoshito; Tsukamoto, Yusuke; Takakuwa, Shigehisa (2021). "Misaligned Circumstellar Disks and Orbital Motion of the Young Binary XZ Tau". The Astrophysical Journal. 919 (1): 55. arXiv:2106.11924. Bibcode:2021ApJ...919...55I. doi:10.3847/1538-4357/ac0dc3. S2CID 235593373.

[SIMBAD-9] "XZ Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-09.

[osorio2017-11] Osorio, Mayra; MacÍas, Enrique; Anglada, Guillem; Carrasco-González, Carlos; Galván-Madrid, Roberto; Zapata, Luis; Calvet, Nuria; Gómez, José F.; Nagel, Erick; Rodríguez, Luis F.; Torrelles, José M.; Zhu, Zhaohuan (2016). "A Dwarf Transitional Protoplanetary Disk Around Xz Tau B". The Astrophysical Journal. 825 (1): L10. arXiv:1606.03118. Bibcode:2016ApJ...825L..10O. doi:10.3847/2041-8205/825/1/L10. S2CID 59585588.

[12] "Jets, bubbles, and bursts of light in Taurus". www.spacetelescope.org. ESA/Hubble. Retrieved 6 November 2014.

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XZ Tauri

Gallery

Notes

References

External links

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