Langbahn Team – Weltmeisterschaft

HD 100453

HD 100453

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
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 11h 33m 05.5766s
Declination −54° 19′ 28.5471″
Apparent magnitude (V) 7.79[2]
Characteristics
Evolutionary stage Herbig Ae/Be star[3]
Spectral type A9Ve
Apparent magnitude (g) 7.735[4]
Apparent magnitude (B) 8.07[3]
Apparent magnitude (R) 7.63[3]
Apparent magnitude (K) 5.60[3]
Astrometry
Radial velocity (Rv)14.597[4] km/s
Proper motion (μ) RA: -36.96±0.02 mas/yr[4]
Dec.: -5.86±0.02 mas/yr[4]
Parallax (π)9.636 ± 0.022 mas[4]
Distance338.5 ± 0.8 ly
(103.8 ± 0.2 pc)
Details[3]
Mass1.59±0.06 M☉
Luminosity6.15±1.07 L☉
Temperature7250±250 K
Age11[5] Myr
Other designations
CD-53 4102, GSC 08617-01438, HIP 56354, 2MASS J11330559-5419285, TYC 8617-1438-1, Gaia DR3 5345011040956367104
HD 100453A:
HD 100453B:
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.[6] The secondary is an M4 class red dwarf star at the projected separation 120 AU from the primary.[7]

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,[3] roughly 15–20 AU from the primary.[8] The outer disk has a 2-arm spiral structure caused by the outer stellar companion HD 100453B.[7] The outer disk is rather massive at 0.0174M☉,[9] but is significantly depleted in gas, with a gas-to-dust mass ratio of no more than 4:1.[6]

The HD 100453A planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
([[]]s) 		Eccentricity Inclination Radius
inner disk 0.315[3] AU 46.05+0.88
−0.92 [3]° 		—
outer disk 45[7] AU 33.80+0.77
−0.72[3]° 		—

The gas present in the disks is unusually depleted in nitrogen and hydrogen-bearing compounds and enriched in carbon monoxide.[5] Molecular hydrogen was not detected.[10] Solid silicate material present in the disks shows good crystallinity, with reduced amounts of amorphous material.[11]

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🜨.[12]

References

  1. ^ "SPHERE reveals spiral disc around nearby star". European Southern Observatory. European Southern Observatory. Retrieved 27 September 2024.
  2. ^ "HD 100453", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2022-06-15
  3. ^ a b c d e f g h i Bohn, A. J.; Benisty, M.; Perraut, K.; Van Der Marel, N.; Wölfer, L.; Van Dishoeck, E. F.; Facchini, S.; Manara, C. F.; Teague, R.; Francis, L.; Berger, J.-P.; Garcia-Lopez, R.; Ginski, C.; Henning, T.; Kenworthy, M.; Kraus, S.; Ménard, F.; Mérand, A.; Pérez, L. M. (2022), "Probing inner and outer disk misalignments in transition disks", Astronomy & Astrophysics, 658: A183, arXiv:2112.00123, doi:10.1051/0004-6361/202142070, S2CID 244773075
  4. ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  5. ^ a b 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, arXiv:2111.07655, doi:10.1093/mnras/stab3146
  6. ^ a b Collins, K. A.; Grady, C. A.; Hamaguchi, K.; Wisniewski, J. P.; Brittain, S.; Sitko, M.; Carpenter, W. J.; Williams, J. P.; Mathews, G. S.; Williger, G. M.; Van Boekel, R.; Carmona, A.; Henning, Th.; Van Den Ancker, M. E.; Meeus, G.; Chen, X. P.; Petre, R.; Woodgate, B. E. (2009), "Hd 100453: A Link Between Gas-Rich Protoplanetary Disks and Gas-Poor Debris Disks", The Astrophysical Journal, 697 (1): 557–572, arXiv:0903.0440, Bibcode:2009ApJ...697..557C, doi:10.1088/0004-637X/697/1/557, S2CID 18159262
  7. ^ a b c 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, arXiv:1512.04949, doi:10.3847/2041-8205/816/1/L12, S2CID 119120465
  8. ^ 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, arXiv:2009.10505, doi:10.1093/mnras/staa2721
  9. ^ 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, arXiv:1904.12781, Bibcode:2019ApJ...877..100Y, doi:10.3847/1538-4357/ab1d65, S2CID 139106821
  10. ^ Carmona, A.; Van Den Ancker, M. E.; Henning, Th.; Pavlyuchenkov, Ya.; Dullemond, C. P.; Goto, M.; Thi, W. F.; Bouwman, J.; Waters, L. B. F. M. (2007), "A search for mid-infrared molecular hydrogen emission from protoplanetary disks", Astronomy & Astrophysics, 477 (3): 839–852, arXiv:0710.2813, doi:10.1051/0004-6361:20077846, S2CID 11639370
  11. ^ 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, Bibcode:2004A&A...427..519V, doi:10.1051/0004-6361:20040420
  12. ^ Van Der Plas, G.; Ménard, F.; Gonzalez, J.-F.; Perez, S.; Rodet, L.; Pinte, C.; Cieza, L.; Casassus, S.; Benisty, M. (2019), "ALMA study of the HD 100453 AB system and the tidal interaction of the companion with the disk", Astronomy & Astrophysics, 624: A33, arXiv:1902.00720, Bibcode:2019A&A...624A..33V, doi:10.1051/0004-6361/201834134, S2CID 102486890
Quelle: http://en.wikipedia.org/wiki/HD_100453