# ROME/REA: A gravitational microlensing search for exo-planets beyond the snow-line on a global network of robotic telescopes

**Authors:** Yiannis Tsapras, R. A. Street, M. Hundertmark, E. Bachelet, M. Dominik, V. Bozza, A. Cassan, J. Wambsganss, K. Horne, S. Mao, W. Zang, D. M. Bramich, A. Saha  
**arXiv:** [1910.05156](https://arxiv.org/abs/1910.05156)  
**Date:** 2019-10-11  
**Summary page:** https://www.summarizepaper.com/en/paper/1910.05156v1/

## Key points

- The ROME/REA project is a gravitational microlensing search for exoplanets beyond the snow-line
- Aims to discover and study planets in the cold outer regions of planetary systems
- Planet population synthesis models predict a significant number of planets with semi-major axes between 1-10 au in these regions
- Difficult to detect using traditional planet finding techniques
- Utilizes a multi-band survey with reactive follow-up observations
- Takes advantage of Las Cumbres Observatory (LCO) global network of robotic telescopes and Target and Observation Manager (TOM) system
- Main science driver is to discover exoplanets beyond the snow-line and investigate their distribution
- Snow-line refers to the distance from a star where volatile compounds like water can condense into solid ice particles
- Understanding how planets form and evolve in these cold regions is essential for advancing knowledge of planetary systems as a whole
- Presents an overview of main science objectives and technical details of the ROME/REA project
- Includes initial results obtained through this innovative approach

## Summary

The ROME/REA project is a gravitational microlensing search for exoplanets beyond the snow-line, which aims to discover and study planets in the cold outer regions of planetary systems. Planet population synthesis models predict that there should be a significant number of planets with semi-major axes between 1-10 au in these regions, but they are difficult to detect using traditional planet finding techniques. These planets lie at the edge of detection limits, making it crucial to develop new methods to overcome these limitations. To achieve its objectives, the ROME/REA project utilizes a novel approach that combines a multi-band survey with reactive follow-up observations. This approach takes advantage of the unique capabilities offered by the Las Cumbres Observatory (LCO) global network of robotic telescopes, along with a Target and Observation Manager (TOM) system. The main science driver behind the ROME/REA project is to discover exoplanets beyond the snow-line and investigate their distribution. The snow-line refers to the distance from a star where volatile compounds like water can condense into solid ice particles. Understanding how planets form and evolve in these cold regions is essential for advancing our knowledge of planetary systems as a whole. This paper presents an overview of the main science objectives and technical details of the ROME/REA project. It also includes initial results obtained through this innovative approach. The authors involved in this research include Yiannis Tsapras, R.A. Street, M. Hundertmark, E. Bachelet, M. Dominik, V. Bozza, A. Cassan, J. Wambsganss, K. Horne, S Saha and others who have contributed significantly towards this project's success .