Leonardo A. dos Santos, PhD

I am an Assistant Astronomer at the Space Telescope Science Institute working with the COS instrument team of the Hubble Space Telescope and an Associate Research Scientist at the Physics and Astronomy Department of the Johns Hopkins University. I was born and raised in Brazil and my pronouns are he/him/his 🏳️‍🌈.

My main research topic is the characterization of extra-solar planets and their atmospheres. I am also interested in stellar atmospheres and developing scientific software for the astronomical community. The main instruments I use in my research are high-resolution and/or space-based spectrographs.

My talks on public record:

My full list of publications can be found on ADS. Here are some highlights:

L. A. Dos Santos, 2023 Observations of planetary winds and outflows, IAUS 370.
L. A. Dos Santos, A. A. Vidotto, S. Vissapragada, et al. 2021 p-winds: an open-source Python code to model planetary outflows and upper atmospheres, A&A 659.
L. A. Dos Santos, D. Ehrenreich, V. Bourrier, et al. 2020, The high-energy environment and atmospheric escape of the mini-Neptune K2-18 b, A&A Letters 634.
L. A. Dos Santos, D. Ehrenreich, V. Bourrier, et al. 2019, The Hubble PanCET program: an extensive search for metallic ions in the exosphere of GJ 436 b, A&A 629.
L. A. Dos Santos, J. Meléndez, J.-D. do Nascimento, et al. 2016, The Sun as a typical rotator and evidence for a new rotational braking law for Sun-like stars, A&A 592.

You can also look me up on ORCID iD icon orcid.org/0000-0002-2248-3838 and Google Scholar.

Occasionally I write software in Python and scripts for astronomical research. Here are some that I think could be useful for you:

p-winds: Isothermal Parker wind models for upper atmospheres of planets. Feel free to create a pull request or submit issues on GitHub!
stissplice: Splice echelle spectra from STIS.
flatstar: Draw (exo)planetary transits.
sunburn: Data analysis package of HST far-UV spectra.