J/ApJS/259/54 Free inclinations for TNOs in Kuiper belt (Huang+, 2022)
Free inclinations for trans-Neptunian objects in the main Kuiper belt.
Huang Y., Gladman B., Volk K.
<Astrophys. J. Suppl. Ser., 259, 54 (2022)>
=2022ApJS..259...54H 2022ApJS..259...54H
ADC_Keywords: Minor planets; Surveys
Keywords: Trans-Neptunian objects ; Kuiper belt ;
Classical Kuiper belt objects ; Celestial mechanics
Abstract:
There is a complex inclination structure present in the
trans-Neptunian object (TNO) orbital distribution in the main
classical-belt region (between orbital semimajor axes of 39 and 48au).
The long-term gravitational effects of the giant planets make TNO
orbits precess, but nonresonant objects maintain a nearly constant
"free" inclination (Ifree) with respect to a local forced precession
pole. Because of the likely cosmogonic importance of the distribution
of this quantity, we tabulate free inclinations for all main-belt
TNOs, each individually computed using barycentric orbital elements
with respect to each object's local forcing pole. We show that the
simplest method, based on the Laplace-Lagrange secular theory, is
unable to give correct forcing poles for objects near the ν18
secular resonance, resulting in poorly conserved Ifree values in much
of the main belt. We thus instead implemented an averaged Hamiltonian
to obtain the expected nodal precession for each TNO, yielding
significantly more accurate free inclinations for nonresonant objects.
For the vast majority (96%) of classical-belt TNOs, these Ifree values
are conserved to <1° over 4 Gyr numerical simulations,
demonstrating the advantage of using this well-conserved quantity in
studies of the TNO population and its primordial inclination profile;
our computed distributions only reinforce the idea of a very coplanar
surviving "cold" primordial population, overlain by a large I-width
implanted "hot" population.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 181 2018 Barycentric elements and Ifree for main-belt
trans-Neptunian objects (TNOs)
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See also:
II/371 : The Dark Energy Survey (DES): Data Release 2 (Abott+, 2021)
J/A+A/468/L13 : Phot. of the trans-Neptunian object 2005FY9 (Ortiz+, 2007)
J/ApJS/189/336 : HST astrometry of TNOs (Benecchi+, 2010)
J/A+A/569/A3 : Rotational properties of TNOs (Thirouin+, 2014)
J/A+A/584/A96 : Observations of 50 TNOs and Centaurs (Desmars+, 2015)
J/AJ/154/62 : Orbital parameters of Kuiper Belt objects (Volk+, 2017)
J/AJ/156/33 : Resonance sticking in scattering TNOs (Yu+, 2018)
J/ApJS/236/18 : OSSOS. VII. TNOs complete data release (Bannister+, 2018)
J/ApJS/243/12 : Outer Solar System Origins Survey colors (Schwamb+, 2019)
J/ApJS/244/19 : OSSOS. XII. Subaru/HSC obs. of 65 TNOs (Alexandersen+, 2019)
J/ApJ/883/L21 : LC of the TNO Varuna (Fernandez-Valenzuela+, 2019)
J/AJ/157/120 : TNOs & Centaurs observed within the DES (Banda-Huarca+, 2019)
J/AJ/157/228 : Cold Classical TNOs: LCs & rot. properties (Thirouin+, 2019)
J/AJ/159/133 : Orbital elements of TNOs from DES (Khain+, 2020)
J/ApJS/258/41 : TNOs from the full six years of DES (Bernardinelli+, 2022)
http://ssd.jpl.nasa.gov/ : JPL solar system objects home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.5 AU a [39/48] Semimajor axis of nominal orbit (1)
10- 16 F7.5 --- e [0.002/0.94] Eccentricity (1)
18- 26 F9.5 deg inc [0.035/150.24] Inclination (1)
28- 36 F9.5 deg Omega [0.138/359.42] Longitude of ascending node (1)
38- 46 F9.5 deg omega [0.114/359.95] Argument of perihelion (1)
48- 56 F9.5 deg M [0.03/359.97] Mean anomaly (1)
58- 65 F8.5 AU Dist [9.5/55.97] Distance (1)
67- 71 F5.2 mag H [-0.12/16.2]? Absolute magnitude (2)
73- 76 I4 --- RESO [-1/2013] Dynamics flag (3)
78- 85 F8.4 deg Ifree [0.015/407.78]? Free inclination from double
averaging (4)
87- 96 F10.4 deg Ifrrange [0.03/16013.2]? Free inclination over 10Myr
integration time (4)
98- 106 F9.4 deg qForced [-369.91/203.45]? Q component of forcing
pole (qForce=Iforced*cos(Ωforced))
108- 116 F9.4 deg pForced [-156.94/88.97]? P component of forcing
pole (pForce=Iforced*sin(Ωforced))
118- 126 A9 --- OSSOS OSSOS++ internal designation
(x=a non-OSSOS++ object)
128- 137 A10 --- DES DES internal designation
(x=a non-DES object)
139- 146 A8 --- JPL JPL Small-Body Database identifier (2)(5)
148- 153 I6 --- Planet ? Asteroid number if any (2)
155- 170 A16 --- OName Designation (2)
172- 181 A10 --- Name Full name (2)
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Note (1): The first six orbital elements and the distance are barycentric
and in the IAU76/J2000 ecliptic reference frame, referring to epoch
JD 2459400.5.
Note (2): The absolute magnitude H, IDs and Full name are directly retrieved
from JPL on October 5th, 2021; these values could change as the MPC
receives additional observations.
Note (3): Dynamic flag:
-1 = scattering;
0 = non-resonant/classical;
>0 = the exactly resonant ratio, e.g. "74" stands for the 7/4
mean-motion resonance with Neptune.
Note (4): Both Ifree and Ifree range are independent of the choice of
reference frame.
Note (5): For a numbered TNO, JPL ID gives its designated number;
For an unnumbered TNO, JPL ID gives its compact provisional
designation.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 30-Jun-2022