Astronomy:HD 100453

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Short description: Young binary in constellation Centaurus

Coordinates: Sky map 11h 33m 05.5766s, −54° 19′ 28.5471″

HD 100453
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An unusual structure around HD 100453 uncovered by ESO's SPHERE, a planet-hunting instrument installed on the Very Large Telescope in Chile[1]
Observation data
Equinox J2000.0]] (ICRS)
Constellation Centaurus[2]
Right ascension  11h 33m 05.5766s[3]
Declination −54° 19′ 28.547″[3]
Apparent magnitude (V) 7.79[4]
Characteristics
Evolutionary stage Herbig Ae/Be star[5]
Spectral type A9Ve[6]
Apparent magnitude (g) 7.735[3]
Apparent magnitude (B) 8.07[5]
Apparent magnitude (R) 7.63[5]
Apparent magnitude (K) 5.60[5]
Astrometry
Radial velocity (Rv)14.597[3] km/s
Proper motion (μ) RA: −36.96±0.02[3] mas/yr
Dec.: −5.86±0.02[3] mas/yr
Parallax (π)9.636 ± 0.022[3] mas
Distance338.5 ± 0.8 ly
(103.8 ± 0.2 pc)
Absolute magnitude (MV)+2.39[2]
Orbit[7]
Semi-major axis (a)207 au
Eccentricity (e)0.32
Inclination (i)49°
Longitude of the node (Ω)47°
Periastron epoch (T)1790
Argument of periastron (ω)
(secondary)		18°
Details
A
Mass1.60+0.05
−0.04[8] M☉
Radius1.57 ± 0.11[8][lower-alpha 1] R☉
Luminosity6.31±0.14[8] L☉
Surface gravity (log g)4.47±0.05[8] cgs
Temperature7,250±250[5][8] K
Metallicity [Fe/H]−0.1±0.1[8] dex
Rotation0.92±0.10[8] days
Rotational velocity (v sin i)50±3[8] km/s
Age19.28+0.70
−0.68[8] Myr
B
Mass0.20±0.04[7] M☉
Radius0.77[7][lower-alpha 2] R☉
Luminosity0.06[7] L☉
Temperature3,250[7] K
Other designations
CD−53°4102, HIP 56354, TYC 8617-1438-1, GSC 08617-01438, 2MASS J11330559-5419285[9]
Database references
SIMBADdata

HD 100453 is a binary star system which lies in the constellation Centaurus about 350 light years away from the Sun and is a member of the open cluster Scorpius–Centaurus association.

Components

The apparent magnitudes of the visible components A and B are 7.8 and 15.9 respectively. The primary is a Herbig Ae/Be star, which is young but no longer accreting mass.[10] The secondary is an M4 class red dwarf star at the projected separation 120 AU from the primary.[11]

Circumstellar disks

The primary star is surrounded by two dust disks, separated by a gap. The disks are orbiting in different planes, misaligned by 72 degrees. The disk misalignment may be caused by a suspected superjovian planet orbiting within the gap,[5] roughly 15–20 AU from the primary.[12] The outer disk has a 2-arm spiral structure caused by the outer stellar companion HD 100453B.[11] The outer disk is rather massive at 0.0174 M☉,[13] but is significantly depleted in gas, with a gas-to-dust mass ratio of no more than 4:1.[10]

The HD 100453A planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
inner disk 0.315[5] AU 46.05+0.88−0.92 [5]° —
outer disk 45[11] AU 33.80+0.77−0.72[5]° —

The gas present in the disks is unusually depleted in nitrogen and hydrogen-bearing compounds and enriched in carbon monoxide.[14] Molecular hydrogen was not detected.[15] Solid silicate material present in the disks shows good crystallinity, with reduced amounts of amorphous material.[16]

No disks were detected around the companion star HD 100453B, with the upper limit on the amount of dust around it being 0.03 M🜨.[17]

Notes

  1. ↑ Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of 5,772 K:(5,7727,250)4⋅100.79=1.57 R⊙.
  2. ↑ Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of 5,772 K:(5,7723,250)4⋅0.06=0.77 R⊙.

References

  1. ↑ "SPHERE reveals spiral disc around nearby star". https://www.eso.org/public/images/potw1542a/. 
  2. ↑ 2.0 2.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  4. ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355. Bibcode: 2000A&A...355L..27H. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 Bohn, A. J.; Benisty, M.; Perraut, K.; Van Der Marel, N.; Wölfer, L.; Van Dishoeck, E. F.; Facchini, S.; Manara, C. F. et al. (2022), "Probing inner and outer disk misalignments in transition disks", Astronomy & Astrophysics 658: A183, doi:10.1051/0004-6361/202142070 
  6. ↑ Vieira, S. L. A.; Corradi, W. J. B.; Alencar, S. H. P.; Mendes, L. T. S.; Torres, C. A. O.; Quast, G. R.; Guimarães, M. M.; Da Silva, L. (2003). "Investigation of 131 Herbig Ae/Be Candidate Stars". The Astronomical Journal 126 (6): 2971. doi:10.1086/379553. Bibcode: 2003AJ....126.2971V. 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 Jean-François, Gonzalez; van der Plas, Gerrit; Christophe, Pinte; Nicolás, Cuello; Rebecca, Nealon; François, Ménard; Alexandre, Revol; Laetitia, Rodet et al. (2020-11-10). "Spirals, shadows, and precession in HD 100453 – I. The orbit of the binary" (in en). Monthly Notices of the Royal Astronomical Society 499 (3): 3837–3856. doi:10.1093/mnras/staa2938. ISSN 0035-8711. 
  8. ↑ 8.0 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 Mendigutía, I.; Campbell-White, J.; Montesinos, B.; Maldonado, J.; Fullana-García, L.; Mirouh, G. M.; Meeus, G.; Vioque, M. et al. (2026-04-06). "Lithium and the evolution of intermediate-mass T Tauri and Herbig stars. Rotation, accretion, and planets". Astronomy & Astrophysics. doi:10.1051/0004-6361/202659302. ISSN 0004-6361. 
  9. ↑ "HD 100453". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+100453. 
  10. ↑ 10.0 10.1 Collins, K. A.; Grady, C. A.; Hamaguchi, K.; Wisniewski, J. P.; Brittain, S.; Sitko, M.; Carpenter, W. J.; Williams, J. P. et al. (2009), "Hd 100453: A Link Between Gas-Rich Protoplanetary Disks and Gas-Poor Debris Disks", The Astrophysical Journal 697 (1): 557–572, doi:10.1088/0004-637X/697/1/557, Bibcode: 2009ApJ...697..557C 
  11. ↑ 11.0 11.1 11.2 Dong (董若冰), Ruobing; Zhu (朱照寰), Zhaohuan; Fung (馮澤之), Jeffrey; Rafikov, Roman; Chiang (蔣詒曾), Eugene; Wagner, Kevin (2015), "An M Dwarf Companion and ITS Induced Spiral Arms in the Hd 100453 Protoplanetary Disk", The Astrophysical Journal 816: L12, doi:10.3847/2041-8205/816/1/L12 
  12. ↑ Nealon, Rebecca; Cuello, Nicolás; Gonzalez, Jean-François; Van Der Plas, Gerrit; Pinte, Christophe; Alexander, Richard; Ménard, François; Price, Daniel J. (2020), "Spirals, shadows & precession in HD 100453 – II. The hidden companion", Monthly Notices of the Royal Astronomical Society 499 (3): 3857–3867, doi:10.1093/mnras/staa2721 
  13. ↑ Yu, Si-Yue; Ho, Luis C.; Zhu, Zhaohuan (2019), "A Tight Relation between Spiral Arm Pitch Angle and Protoplanetary Disk Mass", The Astrophysical Journal 877 (2): 100, doi:10.3847/1538-4357/ab1d65, Bibcode: 2019ApJ...877..100Y 
  14. ↑ Smirnov-Pinchukov, Grigorii V.; Moór, Attila; Semenov, Dmitry A.; Ábrahám, Péter; Henning, Thomas; Kóspál, Ágnes; Hughes, A Meredith; Di Folco, Emmanuel (2022), "Lack of other molecules in CO-rich debris discs: Is it primordial or secondary gas?", Monthly Notices of the Royal Astronomical Society 510: 1148–1162, doi:10.1093/mnras/stab3146 
  15. ↑ Carmona, A.; Van Den Ancker, M. E.; Henning, Th.; Pavlyuchenkov, Ya.; Dullemond, C. P.; Goto, M.; Thi, W. F.; Bouwman, J. et al. (2007), "A search for mid-infrared molecular hydrogen emission from protoplanetary disks", Astronomy & Astrophysics 477 (3): 839–852, doi:10.1051/0004-6361:20077846 
  16. ↑ Vandenbussche, B.; Dominik, C.; Min, M.; Van Boekel, R.; Waters, L. B. F. M.; Meeus, G.; De Koter, A. (2004), "Tentative detection of micron-sized forsterite grains in the proto-planetary disk surrounding HD 100453", Astronomy & Astrophysics 427 (2): 519–523, doi:10.1051/0004-6361:20040420, Bibcode: 2004A&A...427..519V 
  17. ↑ Van Der Plas, G.; Ménard, F.; Gonzalez, J.-F.; Perez, S.; Rodet, L.; Pinte, C.; Cieza, L.; Casassus, S. et al. (2019), "ALMA study of the HD 100453 AB system and the tidal interaction of the companion with the disk", Astronomy & Astrophysics 624: A33, doi:10.1051/0004-6361/201834134, Bibcode: 2019A&A...624A..33V 



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