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Chu

Astronomy Colloquium - "Finding Chupiter"

Event Type
Seminar/Symposium
Sponsor
Department of Astronomy
Location
Loomis 144
Date
Apr 12, 2022   3:45 pm  
Speaker
You-Hua Chu, ASIAA Taiwan
Contact
Rebecca Bare
E-Mail
rsbare@illinois.edu
Phone
217-265-8226
Views
29
Originating Calendar
Astronomy Colloquium Speaker Calendar
About 20 years ago, when exoplanets were a hot topic, we decided to search for Jovian planets around hot white dwarfs (WDs) using high-dispersion spectra, expecting that the surface of a Jovian planet orbiting close to the hot WD is ionized and emits the H-alpha line.  We did not find any, but Bryan Dunne suggested and we agreed to call a Jupiter around a hot WD "Chupiter".  I was intrigued by 1 keV X-ray photons detected at apparently single WDs.  No companions could be found to explain this X-ray emission that is too hard for WD's photospheric emission.  Finally, XMM observations of KPD0005+5106 revealed a modulated hard X-ray light curve.  This can be explained only by a sub-stellar companion.  This companion could be a brown dwarf or a giant plant like Jupiter. Maybe we have found a Chupiter!

 

Topic: Astronomy Colloquium SP22

 

Join Zoom Meeting

https://illinois.zoom.us/j/89880242486?pwd=aUt5TXRBWU9zcTNwM1dHOXB0NWNVUT09

 

Meeting ID: 898 8024 2486

Password: 926922

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