26 citations · 51 across the 18 of their papers we have counts for
19 papers
Planet-Planet Secular Migration Predicts a Stellar Obliquity-Period Anti-Correlation
Hareesh Gautham Bhaskar, Cristobal Petrovich, Diego J. Muñoz
Stellar obliquities provide a fossil record of hot Jupiter (HJ) migration. An emerging observational trend in single-star systems is that strongly misaligned HJs are largely confin…
High-Eccentricity Tidal Migration Driven by Secular Chaos in Wide-Binary Systems
Yurou Liu, Hareesh Gautham Bhaskar, Xian-Yu Wang +1
High-eccentricity tidal migration driven by a distant stellar companion offers a natural pathway for producing some hot Jupiters; yet, most theoretical work has relied on an ideali…
Thermally Regulated Viscoelastic Tidal Migration of Eccentric Planets
Cristobal Petrovich, Hareesh Gautham Bhaskar
A growing population of short-period Neptune-like planets has nonzero eccentricities and, in some cases, large stellar obliquities, suggestive of high-eccentricity migration. Model…
POSEIDON II: The Anti-Aligned Orbit of the Warm Neptune TOI-1710 A b
Juan I. Espinoza-Retamal, Hareesh Bhaskar, Joshua N. Winn +7
We present an observation of the Rossiter-McLaughlin effect for the TOI-1710 system with the NEID spectrograph on the WIYN 3.5 m telescope. The system hosts a warm Neptune ($P\sim2…
Hot Jupiters' Isolation Is Not Unique to High-Eccentricity Tidal Migration
Brandon Radzom, Songhu Wang, Bonan Pu +2
Conventionally, the observed isolation of hot Jupiters, marked by a paucity of nearby low-mass planetary companions, has been interpreted as evidence of high-eccentricity tidal mig…
TOI-7154b: A Close-in Massive Brown Dwarf in an Eccentric Orbit
Rohan Ch. Das, Churchil Dwivedi, Rishikesh Sharma +12
We report here the discovery and characterization of a high-mass transiting brown dwarf in a close-in orbit around its host star, TOI-7154. Initially, the host star was identified…
Planetesimal-Driven Instabilities in Resonant Chains of Cold Neptunes and Their Dynamical Outcomes
Ryan LoRusso, Cristobal Petrovich, Hareesh Gautham Bhaskar
Cold Neptunes and sub-Neptunes are among the most common products of planet formation and likely dominate the angular-momentum budgets in most planetary systems, yet their dynamica…
Early Evidence for Polar Orbits of Sub-Saturns Around Hot Stars
Emma Dugan, Xian-Yu Wang, Agustin Heron +4
Sub-Saturns have been reported to preferentially occupy near-polar orbits, but this conclusion has so far been based primarily on systems with cool host stars; obliquity measuremen…
A Cold and Super-Puffy Planet on a Prograde Orbit
Juan I. Espinoza-Retamal, Rafael Brahm, Cristobal Petrovich +36
We report the discovery of TOI-4507 b, a transiting sub-Saturn with a density 0.2 g/cm on a 105-day prograde orbit around a 700 Myr old F star. The transits were detected u…
Scattering of stellar-mass black holes and gravitational wave bremsstrahlung radiation in AGN disks
Peter Lott, Christian Faulhaber, Joshua Brandt +3
Dynamics of stellar mass black holes (sBHs) embedded in active galactic nuclei (AGNs) could produce highly eccentric orbits near the central supermassive black hole, leading to rep…
Properties of Free Floating Planets Ejected through Planet-Planet Scattering
Hareesh Gautham Bhaskar, Hagai Perets
Multiple studies have shown that planet-planet scattering plays an important role in the dynamical evolution of planetary systems. For instance, it has been shown that planet-plane…
TOI-6038 A b: A dense sub-Saturn in the transition regime between the Neptunian ridge and savanna
Sanjay Baliwal, Rishikesh Sharma, Abhijit Chakraborty +13
We present the discovery and characterization of a sub-Saturn exoplanet, TOI-6038~A~b, using the PARAS-2 spectrograph. The planet orbits a bright (), metal-rich late F-typ…
Main-sequence systems: orbital stability in stellar binaries
Billy Quarles, Hareesh Gautham Bhaskar, Gongjie Li
The majority of star formation results in binaries or higher multiple systems, and planets in such systems are constrained to a limited range of orbital parameters in order to rema…
Main-sequence systems: orbital stability around single star hosts
Hareesh Gautham Bhaskar, Nathaniel W. H. Moore, Jiapeng Gao +2
Stability is one of the most fundamental aspects regarding planetary systems. It plays an important role in our understanding on the formation channel of the planetary systems, as…
Dynamical and Secular Stability of Mutually Inclined Planetary Systems
Hareesh Gautham Bhaskar, Hagai Perets
Multiple analytical and empirical stability criteria have been derived in the literature for two planet systems. But, the dependence of the stability limit on the initial mutual in…
Enhanced Blackhole mergers in AGN discs due to Precession induced resonances
Hareesh Gautham Bhaskar, Gongjie Li, Doug Lin
Recent studies have shown that AGN discs can host sources of gravitational waves. Compact binaries can form and merge in AGN discs through their interactions with the gas and other…
Blackhole Mergers Through Evection Resonances
Hareesh Gautham Bhaskar, Gongjie Li, Douglas N. C. Lin
Mechanisms have been proposed to enhance the merger rate of stellar mass black hole binaries, such as the Von Zeipel-Lidov-Kozai mechanism (vZLK). However, high inclinations are re…
Secular Spin-orbit Resonances of Black Hole Binaries in AGN Disks
Gongjie Li, Hareesh Gautham Bhaskar, Bence Kocsis +1
The spin-orbit misalignment of stellar-mass black hole (sBH) binaries provide important constraints on the formation channels of merging sBHs. Here, we study the role of secular sp…
Mildly-Hierarchical triple dynamics and applications to the outer solar system
Hareesh Gautham Bhaskar, Gongjie Li, Sam Hadden +2
Three-body interactions are ubiquitous in astrophysics. For instance, Kozai-Lidov oscillations in hierarchical triple systems have been studied extensively and applied to a wide ra…