2024RNAAS...8..208M

Query : 2024RNAAS...8..208M

2024RNAAS...8..208M - Research Notes of the AAS, 8, 208 (2024/August-0)

On the Dynamical Erasure of Initial Conditions in Multi-planetary Systems.

MARIMBU K. and LEE E.J.

Abstract (from CDS):

Do sub-Neptunes assemble close to where we see them or do they form full-fledged farther away from their host star then migrate inwards? We explore this question using the distribution of measured orbital periods, one of the most fundamental observable parameters. Under disk-induced migration, planet occurrence rate is expected to decrease toward shorter orbital periods. Presently, the observed sub-Neptune period distribution is flat in log period, between 10 and 300 days. We show, using N-body integration, how post-disk dynamical instabilities and mergers in multi-planetary systems erase the initial conditions of migration emplaced in period distributions over 10 s to 100 Myr timescale, in rough agreement with an observational hint of the abundance of resonant pairs for systems younger than 100 Myr which drops dramatically for more evolved systems. We comment on caveats and future work.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Exoplanet dynamics - Exoplanet astronomy - Exoplanet formation

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 2362 OpC 07 18 41.9 -24 57 08           ~ 428 0

Query : 2024RNAAS...8..208M

Basic data :
NGC 2362 -- Open Cluster
Other object types: otypes_help 		OpC (2013A&A,OCISM,...), Cl* (2020A&A,C,...)
ICRS coord. (ep=J2000) : 		07 18 41.9 -24 57 08 (Optical) [ ] E 2023A&A...674A..37G
FK4 coord. (ep=B1950 eq=1950) : 		07 16 37.4 -24 51 35 [ ]
Gal coord. (ep=J2000) : 		238.1780 -05.5439 [ ]
Proper motions mas/yr : 		-2.791 2.953 [0.014 0.018 90] C 2020A&A...633A..99C
Radial velocity / Redshift / cz : 		V(km/s) 37.509 [0.887] / z(spectroscopic) 0.000125 [0.000003] / cz 37.51 [0.89]
   (Opt) A 2023A&A...674A..37G
Parallaxes (mas): 		0.742 [0.006] C 2020A&A...633A..99C
Angular size (arcmin): 		104.0 104.0 0 (~) C 2022A&A...664A..66M
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 725 		Display criteria :

Identifiers (9) :
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NGC 2362 OCISM 127 Villafranca O-021
C 0716-248 OCl 633 [KPR2004b] 134
NAME Tau CMa OCl 633.0 [KPS2012] MWSC 1173

References (428 between 1850 and 2026) (Total 428)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 7    Distance : 9    Fe/H : 1    Plx : 10    PM : 12   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : NGC 2362

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NGC 2362

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