I am an Assistant Astronomer at the Space Telescope Science Institute working with the COS instrument team of the Hubble Space Telescope. 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:
- 5th NUVA Workshop, 27 October 2020, virtual conference
- SAG21 Community Symposium, 9 March 2021, virtual conference
- Canal da SAB, live chat/interview (in Portuguese)
- ExoExplorers program 2022, 18 February 2022, virtual seminar
- AAS Journals Author Series, 18 November 2023
My full list of publications can be found on ADS. Here are some highlights:
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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.
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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.
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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.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:
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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.