Poster Session

Title

09. Gaia’s M-dwarf Gap and the Transition to Fully Convective Interiors

Presenter Information

Khian SkidmoreFollow

Faculty Mentor(s)

Gregory Feiden

Campus

Dahlonega

Proposal Type

Poster

Subject Area

Physics

Location

Nesbitt 3110

Start Date

13-3-2020 12:00 PM

End Date

13-3-2020 1:30 PM

Description/Abstract

Launched in 2013, the Gaia space telescope measured parallax distances to over 1 billion stars. When comparing the brightnesses and colors of stars observed by Gaia, there appears to be a region where the density of red dwarf stars is lower than expected. We explore the structural instabilities that have been theorized to form this region, now called the “Jao Gap”. To do this, we created a synthetic population of red dwarfs to mimic the population of stars in the local solar neighborhood. Our synthetic population displays a gap that qualitatively shares many similarities with the observed gap. Notably how bright the stars are in the gap, its slope, and the locations of overdense regions. These results boost our confidence in the physics of current stellar structure and evolution models and provide the first definitive evidence that low-mass stars become fully convective.

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Mar 13th, 12:00 PM Mar 13th, 1:30 PM

09. Gaia’s M-dwarf Gap and the Transition to Fully Convective Interiors

Nesbitt 3110

Launched in 2013, the Gaia space telescope measured parallax distances to over 1 billion stars. When comparing the brightnesses and colors of stars observed by Gaia, there appears to be a region where the density of red dwarf stars is lower than expected. We explore the structural instabilities that have been theorized to form this region, now called the “Jao Gap”. To do this, we created a synthetic population of red dwarfs to mimic the population of stars in the local solar neighborhood. Our synthetic population displays a gap that qualitatively shares many similarities with the observed gap. Notably how bright the stars are in the gap, its slope, and the locations of overdense regions. These results boost our confidence in the physics of current stellar structure and evolution models and provide the first definitive evidence that low-mass stars become fully convective.