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] |
| Distance | 338.5 ± 0.8 ly (103.8 ± 0.2 pc) |
| Details[3] | |
| Mass | 1.59±0.06 M☉ |
| Luminosity | 6.15±1.07 L☉ |
| Temperature | 7250±250 K |
| Age | 11[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 | |
| SIMBAD | data |
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
[edit]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
[edit]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]
| 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
[edit]- ^ "SPHERE reveals spiral disc around nearby star". European Southern Observatory. European Southern Observatory. Retrieved 27 September 2024.
- ^ "HD 100453", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2022-06-15
- ^ 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
- ^ 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.
- ^ 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
- ^ 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
- ^ 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
- ^ 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
- ^ 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
- ^ 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
- ^ 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
- ^ 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
