MY RESEARCH BLOG

This is an attempt to give you a feeling of my research work.

Note : the number of papers in each post varies significantly (e.g., I include ~5 papers in planet migration and only one in galactic center). 

July 20, 2017


In Petrovich & Antonini 2017 we studied the orbital evolution of stellar binaries in our galactic center and proposed that a sizable fraction of the LIGO sources come from mergers of binary black holes in galactic nuclei through a combination of three-body interaction...

July 19, 2017

A sizable fraction of both young and old white dwarfs (WDs) are found to have metals in their atmospheres. This is puzzling because metals are expected to sink quickly below the WD's atmospheres compared their ages.

A widely accepted solution to this puzzle is that...

July 18, 2017

One important lesson that have learnt from the thousands of exoplanets discovered to date is that planetary systems often become dynamically unstable. Instabilities can dramatically change the configuration of the planetary system, including its disruption. The observa...

July 11, 2017

I worked on my thesis trying to understand how the hundreds of Jupiter-like planets discovered in short-period orbits (<10 days, the so-called hot Jupiters) could have attained their extreme orbits.

One formation channel that I studied is known as hi...

July 10, 2017

The orbital architecture of multi-planet systems discovered by Kepler encode information about their formation history and evolution. One intriguing observation comes from the period ratio distribution of neighboring planets (see figure below from Fabrycky et al. 2014)...

June 1, 2017

We revisit some fundamental aspects of the theory of disk-satellite interaction and address the questions of how is the tidal torque exerted by a massive perturber distributed troughout the accretion disk (i.e. the torque density). This is a general astrophysical setup...

March 8, 2017

From the standard Neutron Star cooling theory after we expect that after ~10 million years the initially very hot stars have to cooled down to temperatures below ~10^4 K. However, the likely thermal emission MSPJ0437-4715 of age ~7 Gyrs implies a temperarure of ~10^5 K...

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