David Rapetti

Discovery of an Inflated Hot Neptune and Its Formation from Jovian Mass Loss

Grant C. Weldon, Samuel W. Yee, Bradley M. S. Hansen, Smadar Naoz et autres

The production of Neptune-like planets with orbital periods of 3--6 days is challenging for conventional models of high-eccentricity migration. We present the discovery and characterization of TOI-2195~A~b, an inflated hot Neptune ($P = 4.16$ days, $m_p= 1.46M_{\rm Nep},\,R_p = 0.79R_{\rm J}$) orbiting …

Discovery of an Inflated Hot Neptune and Its Formation from Jovian Mass Loss

Grant C. Weldon, Samuel W. Yee, Bradley M. S. Hansen, Smadar Naoz et autres

The production of Neptune-like planets with orbital periods of 3--6 days is challenging for conventional models of high-eccentricity migration. We present the discovery and characterization of TOI-2195~A~b, an inflated hot Neptune ($P = 4.16$ days, $m_p= 1.46M_{\rm Nep},\,R_p = 0.79R_{\rm J}$) orbiting …

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Seeking the Dark Ages of the Universe: Modeling Radio Observations with LuSEE-Night from the Far Side of the Moon

David Barker, Jack O. Burns, David Rapetti

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Single-Star Warm-Jupiter Systems Tend to Be Aligned, Even Around Hot Stars

Xian-Yu Wang, Malena Rice, Songhu Wang, Shubham Kanodia et autres

The stellar obliquity distribution of warm-Jupiter systems is crucial for constraining the dynamical history of Jovian exoplanets, as the warm Jupiters' tidal detachment likely preserves their primordial obliquity. However, the sample size of warm-Jupiter systems with measured stellar obliquities has historically been …

Discovery of two warm mini-Neptunes with contrasting densities orbiting the young K3V star TOI-815

Angelica Psaridi, H. P. Osborn, F. Bouchy, M. Lendl et autres

We present the discovery and characterization of two warm mini-Neptunes transiting the K3V star TOI-815 in a K-M binary system. Analysis of the spectra and rotation period reveal it to be a young star with an age of $200^{+400}_{-200}$Myr. TOI-815b has a …

Algorithms and Statistical Models for Scientific Discovery in the Petabyte Era

B. Nord, High Energy Physics (HEP) USDOE Office of Science (SC), Andrew Connolly, Jamie Kinney et autres

The field of astronomy has arrived at a turning point in terms of size and complexity of both datasets and scientific collaboration. Commensurately, algorithms and statistical models have begun to adapt --- e.g., via the onset of artificial intelligence --- which itself …

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Gas-depleted planet formation occurred in the four-planet system around the red dwarf LHS 1903.

Thomas G Wilson, Anna M Simpson, Andrew Collier Cameron, Ryan Cloutier et autres

The radii of small exoplanets form two populations, super-Earths and sub-Neptunes, separated by a gap known as the radius valley. This could be produced by the removal of some atmospheres by stellar or internal heating, or the lack of an initial envelope. …

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