Calendar

Sep
8
Fri
Planetary Group meeting
Sep 8 @ 10:30 am – 11:30 am
Sep
11
Mon
Pizza Lunch: Drew Chojnowski and Sten Hasselhof
Sep 11 @ 12:30 pm – 1:30 pm
Pizza Lunch: Drew Chojnowski and Sten Hasselhof @ AY 119

A Peculiar Supergiant and One Weird Binary

Sep
20
Wed
Colloquium PhD Defense: Jean McKeever
Sep 20 @ 3:00 pm – 4:15 pm
Colloquium PhD Defense: Jean McKeever @ Business College 103

Asteroseismology of Red Giants: The Detailed Modeling of Red Giants in Eclipsing Binary Systems

Jean McKeever, NMSU

Asteroseismology is an invaluable tool that allows one to peer into the inside of a star and know its fundamental stellar properties with relative ease. There has been much exploration of solar-like oscillations within red giants with recent advances in technology, leading to new innovations in observing. The Kepler mission, with its 4-year observations of a single patch of sky, has opened the floodgates on asteroseismic studies. Binary star systems are also an invaluable tool for their ability to provide independent constraints on fundamental stellar parameters such as mass and radius. The asteroseismic scaling laws link observables in the light curves of stars to the physical parameters in the star, providing a unique tool to study large populations of stars quite easily. In this work we present our 4-year radial velocity observing program to provide accurate dynamical masses for 16 red giants in eclipsing binary systems. From this we find that asteroseismology overestimates the mass and radius of red giants by 15% and 5% respectively. We further attempt to model the pulsations of a few of these stars using stellar evolution and oscillation codes. The goal is to determine which masses are correct and if there is a physical cause for the discrepancy in asteroseismic masses. We find there are many challenges to modeling evolved stars such as red giants and we address a few of the major concerns. These systems are some of the best studied systems to date and further exploration of their asteroseismic mysteries is inevitable.

 

Sep
22
Fri
Planetary Group meeting
Sep 22 @ 10:30 am – 11:30 am
Oct
2
Mon
Pizza Lunch: Sarah Kovac
Oct 2 @ 12:30 pm – 1:30 pm
Pizza Lunch: Sarah Kovac @ AY 119

The Citizen Cate Project

Oct
6
Fri
Planetary Group meeting
Oct 6 @ 10:30 am – 11:30 am
Oct
16
Mon
Pizza Lunch: Ken Naiff
Oct 16 @ 12:30 pm – 1:30 pm
Pizza Lunch: Ken Naiff @ AY 119

Dark Sky Images

Ken Naiff

Ken, an retired engineer, is a highly technically skilled and artistic
astrophotographer.  He will be sharing some of his work and elaborating on
the technical methods and processing techniques he applies to obtain his
unique and enhanced images.  You can see Ken’s work at:

https://darkskyimagesbyken.com/products

 

Oct
20
Fri
Planetary Group meeting
Oct 20 @ 10:30 am – 11:30 am
Oct
23
Mon
Pizza Lunch: Kristian Finlator
Oct 23 @ 12:30 pm – 1:30 pm
Pizza Lunch: Kristian Finlator @ AY 119

Vastly Improved Simulations of the Hydrogen Reionization Epoch: Too Much for One Paper?

Nov
3
Fri
Planetary Group meeting
Nov 3 @ 10:30 am – 11:30 am