I'm currently working on a method to estimate M dwarf ages combining different age indicators in a Bayesian framework. The age indicators I'm combining are Hα emission, 3D velocities, position in the color-magnitude diagram (CMD) and rotation period.
During my Ph.D. (2016-2021) I was part of the BDNYC research group where I worked with my advisors Prof. Kelle Cruz and Dr. Jackie Faherty. During this time I worked on the projects described below. My thesis defense was on July 16th 2021 and the recording is available online.
Age-relations for M dwarfs in the CMD
I collected a sample of 74,216 M and L dwarfs with Hα measurments and Gaia DR2 photometry, parallaxes and proper motions. Using this sample I found relations between age indicators and the position in the CMD. Find more about the sample in my paper Kiman et al. 2019. And reproduce this CMD and more with this jupyter notebook.
Age-activity relation for M dwarfs
I characterized the Hα Age-Activity relation for M dwarfs using a sample of age-calibrators with Halpha equivalent widths from the literature. I obtained their ages from known moving groups and white dwarfs co-movers. Read my paper Kiman et al. 2021 to learn more about this work.
Ages of white dwarfs
I developed an open source Python package called wdwarfdate to estimate white dwarf ages from an effective temperature and a surface gravity in a Bayesian framework. The paper describing the code is in prep. The source of wdwarfdate can be found in GitHub.