Extrasolar Planets


Imaging The Dusty Substructures Due To Terrestrial Planets In Planet-forming Disks With ALMA And The Next Generation Very Large Array

Imaging The Dusty Substructures Due To Terrestrial Planets In Planet-forming Disks With ALMA And The Next Generation Very Large Array

We present simulations of the capabilities of the Atacama Large Millimeter/submillimeter Array (ALMA) and of a Next Generation Very Large Array (ngVLA) to detect and resolve substructures due to terrestrial planets and Super-Earths in nearby planet-forming disks.


Observability Of Ultraviolet N I Lines In The Atmosphere Of Transiting Earth-like Planets

Observability Of Ultraviolet N I Lines In The Atmosphere Of Transiting Earth-like Planets

Nitrogen is a biosignature gas that cannot be maintained in its Earth-like ratio with CO2 under abiotic conditions. It has also proven to be notoriously hard to detect at optical and infrared wavelengths.


The Demographics of Exoplanets

The Demographics of Exoplanets

In the broadest sense, the primary goal of exoplanet demographic surveys is to determine the frequency and distribution of planets as a function of as many of the physical parameters that may influence planet formation and evolution as possible, over as broad of a range of these parameters as possible.


Clouds In Exoplanetary Atmospheres

Clouds In Exoplanetary Atmospheres

Today, we know ~4330 exoplanets orbiting their host stars in ~3200 planetary systems. The diversity of these exoplanets is large, and none of the known exoplanets is a twin to any of the solar system planets, nor is any of the known extrasolar planetary systems a twin of the solar system.


SPECULOOS -- Ultracool Dwarf Transit Survey: Target List And Strategy

SPECULOOS -- Ultracool Dwarf Transit Survey: Target List And Strategy

One of the most promising avenues for the detailed study of temperate Earth-sized exoplanets is the detection of such planets in transit in front of stars small and nearby enough to make possible their thorough atmospheric characterisation with next generation telescopes like the James Webb Space telescope (JWST) or Extremely Large Telescope (ELT).


The CARMENES Search For Exoplanets Around M dwarfs -- LP 714-47b (TOI 442.01): Populating The Neptune desert

The CARMENES Search For Exoplanets Around M dwarfs -- LP 714-47b (TOI 442.01): Populating The Neptune desert

We report the discovery of a Neptune-like planet (LP 714-47 b, P = 4.05204 d, m_b = 30.8 +/- 1.5 M_earth , R_b = 4.7 +/- 0.3 R_earth ) located in the 'hot Neptune desert'.


Effects Of Capturing A Wide-orbit Planet On Planetary Systems: System Stability And Habitable Zone Bombardment Rates

Effects Of Capturing A Wide-orbit Planet On Planetary Systems: System Stability And Habitable Zone Bombardment Rates

A large fraction of stars are formed in dense clusters. In the cluster, close encounters between stars at distances less than 100 au are common.


Temperature Inversions On Hot Super-Earths: The Case Of CN In Nitrogen-rich Atmospheres

Temperature Inversions On Hot Super-Earths: The Case Of CN In Nitrogen-rich Atmospheres

We show that in extremely irradiated atmospheres of hot super-Earths shortwave absorption of CN can cause strong temperature inversions.


HADES RV Programme With HARPS-N aAt TNG XII. The Abundance Signature Of M Dwarf Stars With Planets

HADES RV Programme With HARPS-N aAt TNG XII. The Abundance Signature Of M Dwarf Stars With Planets

Most of our current knowledge on planet formation is still based on the analysis of main-sequence, solar-type stars.


AI And Photonics Join Forces To Make It Easier To Find New Earths

AI And Photonics Join Forces To Make It Easier To Find New Earths

Australian scientists have developed a new type of sensor to measure and correct the distortion of starlight caused by viewing through the Earth's atmosphere, which should make it easier to study the possibility of life on distant planets.


Which Stars Can See Earth As A Transiting Exoplanet?

Which Stars Can See Earth As A Transiting Exoplanet?

Transit observations have found the majority of exoplanets to date. Spectroscopic observations of transits and eclipses are the most commonly used tool to characterize exoplanet atmospheres and will be used in the search for life.


Coupled Day-Night Models of Exoplanetary Atmospheres

Coupled Day-Night Models of Exoplanetary Atmospheres

We provide a new framework to model the day side and night side atmospheres of irradiated exoplanets using 1-D radiative transfer by incorporating a self-consistent heat flux carried by circulation currents (winds) between the two sides.


Physically Constrained Causal Noise Models For High-contrast Imaging Of Exoplanets

Physically Constrained Causal Noise Models For High-contrast Imaging Of Exoplanets

The detection of exoplanets in high-contrast imaging (HCI) data hinges on post-processing methods to remove spurious light from the host star.


Can A Multi-layer Planet Be Approximated As A Homogeneous Planet?

Can A Multi-layer Planet Be Approximated As A Homogeneous Planet?

With the discovery of TRAPPIST-1 and its seven planets within 0.06 au, the correct treatment of tidal interactions is becoming necessary. The eccentricity, rotation, and obliquity of the planets of TRAPPIST-1 are indeed the result of tidal evolution over the lifetime of the system.


Earth As An Exoplanet: I. Time Variable Thermal Emission Using Spatially Resolved MODIS Data

Earth As An Exoplanet: I. Time Variable Thermal Emission Using Spatially Resolved MODIS Data

For the time being, Earth remains the best and only example of a habitable (and inhabited) world.


The CARMENES Search For Exoplanets Around M Dwarfs. Three Temperate To Warm Super-Earths

The CARMENES Search For Exoplanets Around M Dwarfs. Three Temperate To Warm Super-Earths

We announce the discovery of two planets orbiting the M dwarfs GJ 251 (0.360±0.015 M⊙) and HD 238090 (0.578±0.021 M⊙) based on CARMENES radial velocity (RV) data.


Water on Exoplanet Cloud Tops Could Be Found with Hi-Tech Instruments

Water on Exoplanet Cloud Tops Could Be Found with Hi-Tech Instruments

University of Warwick astronomers have shown that water vapour can potentially be detected in the atmospheres of exoplanets by peering literally over the tops of their impenetrable clouds.


Multi-orbital-phase And Multi-band Characterization Of Exoplanetary Atmospheres With Reflected Light Spectra

Multi-orbital-phase And Multi-band Characterization Of Exoplanetary Atmospheres With Reflected Light Spectra

Direct imaging of widely separated exoplanets from space will obtain their reflected light spectra and measure atmospheric properties.


Estimating the Ultraviolet Emission of M dwarfs with Exoplanets from Ca II and Hα

Estimating the Ultraviolet Emission of M dwarfs with Exoplanets from Ca II and Hα

M dwarf stars are excellent candidates around which to search for exoplanets, including temperate, Earth-sized planets. To evaluate the photochemistry of the planetary atmosphere, it is essential to characterize the UV spectral energy distribution of the planet's host star.


Utilizing a Database of Simulated Geometric Albedo Spectra for Photometric Characterization of Rocky Exoplanet Atmospheres

Utilizing a Database of Simulated Geometric Albedo Spectra for Photometric Characterization of Rocky Exoplanet Atmospheres

In anticipation of future flagship missions focused on the goal of achieving direct imaging of rocky exoplanets, we have developed a database of models to help the community examine the potential spectral characteristics of a broad range of rocky planet atmospheres.



Top stories from November.