Title: The TEMPO Survey II: Scientific Opportunities from a Proposed 30-Day Time Domain Survey of the Orion Nebula via the Nancy Grace Roman Space Telescope

The second installment of the TEMPO (Time-domain Exploration of Multi-Planet Systems in Orion) Survey proposes a 30-day time domain survey of the Orion Nebula using the Nancy Grace Roman Space Telescope. This unique endeavor aims to advance astrophysical sciences by capitalizing on the capabilities of the Roman Space Telescope, formerly known as the Wide Field Infrared Survey Telescope (WFIRST). The study hopes to address significant questions in areas including exoplanet science, stellar astrophysics, and star formation, among others.

The proposed TEMPO Survey II intends to observe the Orion Nebula, a massive star-forming region located approximately 1,300 light-years away from Earth. This nebula is particularly interesting due to its proximity and richness in forming stars and planetary systems. By studying the Orion Nebula over a 30-day period, researchers hope to gain insights into the early stages of star and planet formation, which are critical to understanding the overall process of planet evolution.

The primary focus of the investigation is on exoplanet science. By studying the transits and atmospheres of exoplanets, scientists can gain a better understanding of their structure, composition, and overall climate. The study also aims to identify and characterize multi-planet systems in the Orion Nebula, which could provide insights into the formation and dynamics of planetary systems beyond our own.

In the realm of stellar astrophysics, the TEMPO Survey II will provide valuable information on the rotation periods, pulsations, and flares of young stars. This could shed light on the processes involved in stellar evolution and the early stages of star life. Additionally, the study may provide insights into the connection between stellar activity and planet habitability, a key question in the search for life beyond Earth.

The proposed survey also offers a unique opportunity to explore the field of time-domain astrophysics. By monitoring the Orion Nebula over a 30-day period, scientists can study transient events, such as stellar outbursts or supernovae, in greater detail. This could potentially lead to the discovery of new astrophysical phenomena and contribute to a more comprehensive understanding of the universe.

The TEMPO Survey II also hopes to contribute to the study of star formation. The Orion Nebula, with its plethora of young stars and protoplanetary disks, offers a wealth of information on the initial stages of star and planetary system formation. Observations from the survey could help unravel the complexities of these processes, including the factors influencing the initial mass function and the role of stellar feedback in shaping the environment around young stars.

This ambitious project demonstrates the immense potential of the Nancy Grace Roman Space Telescope. As a next-generation space observatory, it has the capability to observe a wide field of view with high precision, making it an ideal tool for this comprehensive study. The TEMPO Survey II not only promises to advance our understanding of the universe but also highlights the value of large-scale time-domain surveys in astrophysics.


The Transiting Exosatellites, Moons, and Planets in Orion (TEMPO) Survey is a suggested 30-day observation mission utilizing the Nancy Grace Roman Space Telescope. It aims to provide a comprehensive and detailed study of a dynamic star-forming region through high-resolution, short-cadence infrared photometry. The primary focus of the TEMPO Survey is to explore the largely unknown demographics of exosatellites orbiting free-floating planets and brown dwarfs.

The TEMPO Survey will simulate the detection yields of three distinct populations of celestial bodies. These include moon-like extrasolar bodies orbiting free-floating planets, exosatellites orbiting brown dwarfs, and exoplanets orbiting young stars. The survey aims to deliver a broad spectrum of scientific results, including confirmation and testing of prevailing theories about moon, planet, and star formation.

The survey also aims to directly detect widely separated exoplanets orbiting young stars and investigate the variability of young stars and brown dwarfs. A further objective is to constrain the low-mass end of the stellar initial mass function. This function describes the initial distribution of masses for a population of stars and is a fundamental tool in the study of star formation and evolution.

Additionally, the TEMPO Survey proposes to construct the distribution of dust in the Orion Nebula and map its evolution in the near-infrared extinction law. This law describes how the intensity of light from stars and galaxies decreases as it passes through a medium containing dust. The survey also plans to map emission features that trace the shocked gas in the region, providing valuable insights into the processes of star formation and the properties of the interstellar medium.

Furthermore, the survey aims to create a dynamical map of Orion members using proper motions. Proper motion is the apparent motion of a star across the sky due to its actual motion through space relative to the Sun. This information will help astronomers understand the movement and distribution of stars in the Orion constellation.

Lastly, the TEMPO Survey will search for extragalactic sources and transients through deep extragalactic observations reaching a limiting magnitude of mAB=29.7 mag (F146 filter). This deep observation could reveal distant galaxies, quasars, and other exotic celestial phenomena.

The TEMPO Survey is a collaborative effort of many scientists and researchers in the fields of planetary astrophysics, instrumentation and methods for astrophysics, solar and stellar astrophysics, and astrobiology. Their combined expertise will ensure a comprehensive and insightful exploration of the Orion constellation and its associated celestial bodies.



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