Active Research

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Simulating the Surfaces of Stars

Joel Tanner, Sarbani Basu, Pierre Demarque, Frank Robinson

Using 3D radiation hydrodynamic simulations, we model the surface layers of low-mass main sequence stars with the aim of improving stellar models. Traditional 1D models typically use the mixing length theory (MLT) to describe convection. Although MLT can adequately describe the gas dynamics in regions of efficient convective energy transport, it breaks down in regions of transition from convective to radiative energy transport, which occurs near the surface of stars with convective envelopes.

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Image Credits: (header) Image of prominence, SOHO (ESA & NASA)

News

08.27.2014 Yale scientists see the birth of a massive galaxy, hidden by dust
Graduate student Erica Nelson and her collaborators have discovered a window into the early, violent formation of the cores of the universe’s monster galaxies, obscured behind walls of dust, using the NASA/ESA Hubble Space Telescope and a telescope from the W.M. Keck Observatory in Hawaii. The discovery offers important clues about an early phase of galaxy development, from a time just 3 billion years after the Big Bang. The research appears in the journal Nature.
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08.07.2014 How do you feed a hungry quasar? With a ‘super boost,’ scientists say
“The first black holes are believed to be remnants left behind after the first stars burned out completely,” said Priyamvada Natarajan, a Yale University professor of astronomy and physics. “The puzzle has been how these ‘seed’ black holes grew into the monsters that we now see within the time available, a few billion years at best.”
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Priya Natarajan
07.31.2014 Yale Researcher Helps Find Most-distant ‘Spyglass In Space’
Yale postdoctoral researcher Ivelina Momcheva says she can see clusters of young stars being formed in distant galaxies.
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Upcoming Events

Colloquia & Seminars | VIEW ALL

Colloquia09.04.2014, 2:30 PM BASS 305
Colloquium - Sabrina Stierwalt
University of Virginia
The Role of Dwarf-Dwarf Interactions in the Hierarchical Assembly

Colloquia09.11.2014, 2:30 PM BASS 305
Colloquium - Nick Wright
University of Hertfordshire, UK
The Dynamics of Star Formation and Star Clusters

YCAA Seminars09.16.2014, 2:30 PM BASS 305
Seminar - Shirley Ho
Carnegie Mellon
TBD-9/16/14

Colloquia09.18.2014, 2:30 PM BASS 305
Colloquium - Jeff Hall
Lowell Observatory
TBA- 9/18/14

Public Events | VIEW ALL

The Leitner Family Observatory and Planetarium is open every Tuesday night for a planetarium show. Weather permitting there will also be public viewing of planets, nebulae, star clusters and whatever happens to be interesting in the sky. Seats are available on a first come first serve basis. No reservations necessary.
Current updates are posted under the Newsblog and Calendar sections at leitnerobservatory.org

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© 2014 Yale University. All Rights Reserved.

Yale University

© 2014 Yale University. All Rights Reserved.