# The influence of cold Jupiters in the formation of close-in planets. I. planetesimal transport

**Authors:** Sergio Best, Antranik A. Sefilian, Cristobal Petrovich  
**arXiv:** [2304.02045](https://arxiv.org/abs/2304.02045)  
**Date:** 2023-04-04  
**Summary page:** https://www.summarizepaper.com/en/paper/2304.02045v1/

## Key points

- Cold Jupiters (CJs) potentially enhance the formation of inner planetary systems
- Recent observations show a correlation between outer CJs and inner Super Earths
- CJs assist in transporting planetesimals within a gaseous disk through secular resonance
- Concentrated rings of planetesimals with aligned apsidal lines are formed
- Velocity dispersion among planetesimals is reduced, making collisions less destructive
- Efficiency depends on factors such as alpha-disk models and Jovian masses
- Peak effectiveness for CJs with masses ranging from 1-5 times that of Jupiter's mass
- Gravity from the disk plays a significant role in redistributing planetesimals
- Formation of close-in planets like super-Earths or warm/hot Jupiters can be influenced
- Implications for planet formation and insights into complex dynamics involved in planetary system formation.

## Summary

The formation of cold Jupiters (CJs) has been found to potentially enhance the formation of inner planetary systems through a snowplow-like process. Recent observations have shown a correlation between the presence of outer CJs and inner Super Earths, challenging previous beliefs that CJs hindered the formation of rocky planets through pebble accretion and orbital migration. In this study, researchers investigate how CJs assist in transporting planetesimals within a viscously-evolving gaseous disk using a semi-analytic model. The results show that as secular resonance sweeps inward through the disk, it gradually transports rings of planetesimals when their drag-assisted orbital decay is faster than the speed of resonance scanning. This leads to concentrated rings with aligned apsidal lines and reduced velocity dispersion among the planetesimals, making their collisions less destructive. The efficiency of this process depends on various factors such as alpha-disk models and Jovian masses, with peak effectiveness for CJs with masses ranging from 1-5 times that Jupiter's mass. These findings shed light on how gravity from the disk can play a significant role in redistributing planetesimals and potentially influence the formation of close-in planets like super-Earths or warm/hot Jupiters. The study also discusses implications for planet formation and offers valuable insights into complex dynamics involved in planetary system formation.