Rocio Kiman

I'm a Postdoctoral Scholar at the Kavli Institute for Theoretical Physics, University of California, Santa Barbara.
I study M dwarf ages. In particular I'm interested in the following age indicators: magnetic activity, dynamics and rotation period, and the correlation between all of them to create a detailed description of M dwarf evolution. Moreover I'm interested in statistical analysis and open source code development.
A detailed list of my publications can be found on ADS.
rociokiman at gmail dot com.


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.



  • ASTRO 10200 - Laboratory Explorations in Astronomy: Hunter College, New York, USA. January 2020 - July 2020.
  • ASTRO 10200 - Laboratory Explorations in Astronomy: Hunter College, New York, USA. August 2019 - December 2019.
  • Classical Mechanics: University of Buenos Aires, Argentina. March 2016 - August 2016.

Astropy tutorials

I developed the following tutorials on how to use the modeling methods in the Python package astropy:


As a member of the American Museum of Natural History (AMNH) Astronomy department, I had several key opportunities to interact with middle and high school students participating in museum outreach events. These included speaking with small visiting classes from ESL (English as a second language) schools and running an astronomy booth for local visiting families at an all-Spanish planetarium program.
I also enjoy giving outreach talks in english and spanish. One of my recent talks at "Viernes Astronómicos" for the Universidad Nacional Mayor de San Marcos, Lima, Perú is available online.
During my undergraduate studies, I joined the outreach group at the University of Buenos Aires where I participated in different events to take science to the public such as: “Physics week” and “Museum Night”. During these events we had exhibitions with physics experiments for middle and high school students, and the general public. I also participated in monthly meetings with groups of high school students to explain to them what the Physics career is about and what it means to be a scientist.