About me

I am a postdoctoral researcher in astrophysics at the Space Telescope Science Institute, where I study the chemo-dynamic properties of star-forming regions.

I enjoy sharing the software I develop for this research. Currently, I am exploring machine learning models to improve these tools, making them more accessible and useful for the community.

Outside of work, I like flying my FPV drone and I am (slowly) learning Dutch. If you’d like to know more, feel free to get in touch!

What i'm doing

  • LiMe logo

    LiMe

    A LIne MEasuring software for large and complex spectroscopic datasets.

  • Web development icon

    SpecSy

    A Spectra Synthesis platform for the chemical analysis of ionized gas.

Daniel lewis
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Daniel lewis

Richard was hired to create a corporate identity. We were very pleased with the work done. She has a lot of experience and is very concerned about the needs of client. Lorem ipsum dolor sit amet, ullamcous cididt consectetur adipiscing elit, seds do et eiusmod tempor incididunt ut laborels dolore magnarels alia.

Institutions I have joined

Resume

Work

  1. University of Michigan

    2023 — present

    Schmidt sciences postdoc at Michigan Institute for Data Science. Application of Machine Learning algorithms for the chemo-dynamic analysis of large and complex spectroscopic datasets.

  2. La Serena University

    2020 — 2023

    Postdoctoral principal investigator in the spectroscopic analysis of green peas galaxies with undergraduate and graduate student co-advising.

Education

  1. PhD in Astrophysics

    INAOE, Mexico

    Primordial helium abundance determination via the spectral analysis of HII Galaxies: YP measurement with the observation and chemical analysis of low metallicity star-forming galaxies

  2. M.Sc. in Astrophysics,

    UNAM, Spain (Grade: 7.4/10)

    Research project: Astronomical data reduction using spectra from the William Herschel telescope. Two-year degree completed in one (120 European credits)

  3. PhD in Fluid Mechanics

    ONERA Toulouse, France

    Experimental study of a liquid sheet disintegration in a high pressure environment: Analysing the fuel injection and atomization at high pressure conditions.

  4. Aeronautical engineering degree

    City University, United Kingdom (Grade: 75/100, First Class Honours)

    Research project: Measuring in a wind tunnel the impact of passive air jet vortex generators in wind turbine blades lift.

Languages

  • Spanish
    (Native)
  • English
    (Superior degrees in English-speaking countries)
  • French
    (Superior degree in French-speaking country)
  • Dutch
    (Learning)

Publications

Scientific journals

  1. Shocks and complex chemodynamics in the metal-poor starburst galaxy CGCG 007-025 revealed through high-resolution echelle spectroscopy.

    MNRAS (2025)

    M. G. del Valle-Espinosa, V. Fernández, R. Sanchez-Janssen, R. Amorín, K. Z. Arellano-Córdova, K. Boustsia

  2. The Prevalence of Bursty Star Formation in Low-Mass Galaxies at z=1-7 from Hα-to-UV Diagnostics.

    ApJ (Accepted, 2025)

    M. Perry, A. Taylor, O. Chavez-Ortiz, S. Finkelstein and the CEERs collaboration

  3. Power-law Emission-line Wings and Radiation-Driven Superwinds in Local Lyman Continuum Emitters.

    ApJ (Accepted, 2025)

    L. Komarova, S. Oey, R. Marques-Chaves, R. Amorín and the LzLCS collaboration

  4. CAPERS-LRD-z9: A Gas-enshrouded Little Red Dot Hosting a Broad-line Active Galactic Nucleus at z = 9.288.

    ApJL (2025)

    A. J. Taylor, V. Kokorev, D. Kocevski and the CAPERs collaboration

  5. CAPERS Observations of Two UV-bright Galaxies at z > 10. More Evidence for Bursting Star Formation in the Early Universe.

    ApJL (2025)

    V. Kokorev, O. A. Chávez Ortiz, A. J. Taylor and the CAPERs collaboration

  6. Very bright, very blue, and very red: JWST CAPERS analysis of highly luminous galaxies with extreme UV slopes at z = 10.

    ApJ (Accepted, 2025)

    C. Donnan, A. Taylor, P. Arrabal-Haro and the CAPERs collaboration

  7. Broad-Line AGN at 3.5 < z < 6: The Black Hole Mass Function and a Connection with Little Red Dots.

    ApJ (2025)

    A. Taylor, S. Finkelstein, D. Kocevski and the CEERs collaboration

  8. The Cosmic Evolution Early Release Science Survey (CEERS).

    ApJ (2025)

    S. Finkelstein, M. B. Bagley, P. Arrabal-Haro, M. Dickinson and the CEERs collaboration

  9. CEERS: Possibly forging the first dust grains in the universe.

    A&A (2024)

    D. Burgarella, V. Buat, P. Theulé and the CEERs collaboration

  10. LiME: A LIne MEasuring library for large and complex spectroscopic data sets: Implementation of a virtual observatory for JWST spectra

    A&A (06 August 2024)

    V. Fernández, R. Amorín V. Firpo and C. Morisset.

  11. Physical properties of strong 1 < z < 3 Balmer and Paschen lines emitters observed with JWST.

    A&A (17 June 2024)

    L-M. Seillé, V. Buat, V. Fernández and the CEERs collaboration.

  12. Ubiquitous broad-line emission and the relation between ionized gas outflows and Lyman continuum escape in Green Pea galaxies.

    A&A letter (27 February 2024)

    R. Amorín, M. Rodríguez-Henríquez, V Fernández and LzLCS collaboration.

  13. Near-infrared emission line diagnostics for AGN from the local Universe to z ∼ 3.

    A&A (15 November 2023)

    A. Calabrò and the CEERs collaboration.

  14. Confirmation and refutation of very luminous galaxies in the early Universe.

    Nature (14 August 2023)

    P. Arrabal Haro and the CEERs collaboration.

  15. Using [Ne V]/[Ne III] to Understand the Nature of Extreme-ionization Galaxies.

    ApJ (28 July 2023)

    N. Cleri and the CEERs collaboration.

  16. Spatially resolved chemodynamics of the starburst dwarf galaxy CGCG007-025: evidence for recent accretion of metal-poor gas.

    MNRAS (14 April 2023)

    M. G. del Valle-Espinosa, R. Sanchez-Janssen, R. Amorín, V. Fernández, P. Papaderos

  17. The Physical Conditions of Emission-Line Galaxies at Cosmic Dawn from JWST/NIRSpec Spectroscopy in the SMACS 0723 Early Release Observations.

    MNRAS (6 March 2023)

    J. Trump and the CEERs collaboration

  18. Dusty Starbursts Masquerading as Ultra-high Redshift Galaxies in JWST CEERS Observations.

    MNRAS (25 January 2023)

    J. Zavala and the CEERs collaboration

  19. The resolved chemical composition of the starburst dwarf galaxy CGCG007-025: Direct method versus photoionization model fitting.

    MNRAS (23 January 2023)

    V. Fernández, R. Amorín, R. Sanchez-Janssen, M. G. del Valle-Espinosa, P. Papaderos

  20. Long Time Ago in a Galaxy Far, Far Away: A Candidate z ~ 12 Galaxy in Early JWST CEERS Imaging.

    MNRAS (1 December 2022)

    S. Finkelstein and the CEERs collaboration

  21. The Far-Ultraviolet Continuum Slope as a Lyman Continuum Escape Estimator at High-redshift.

    MNRAS (7 October 2022)

    J. Chisholm and the Low-z LyC Survey collaboration

  22. Interstellar extinction correction in ionized regions using HeI lines.

    MNRAS (10 August 2022)

    S. Zamora Á. Díaz, E. Terlevich, V. Fernández

  23. No correlation of the Lyman continuum escape fraction with spectral hardness.

    A&A (1 July 2022)

    R. Marques-Chaves and the Low-z LyC Survey collaboration

  24. New insights on the nebular emission, ionizing radiation, and low metallicity of Green Peas from advanced modelling.

    MNRAS (1 November 2021)

    V. Fernández, R. Amorín, E. Pérez-Montero, P. Papaderos, C. Kehrig, J. M. Vílchez

  25. A Bayesian direct method implementation to fit emission line spectra: Application to the primordial He abundance determination.

    MNRAS (29 May 2019)

    V. Fernández, E. Terlevich, A. I Díaz, R. Terlevich

  26. Primordial helium abundance determination using sulphur as metallicity tracer.

    MNRAS (14 May 2018)

    V. Fernández, E. Terlevich, A. I Díaz, R. Terlevich

  27. Dynamic Primary Atomization Characteristics in an Airblast Atomizer, High Pressure Conditions.

    A&S (27 July 2015)

    V. Fernández, G. Lavergne P. Berthoumieu

  28. Geometric Primary Atomization Characteristics in an Airblast Atomizer, High Pressure Conditions.

    A&S (27 July 2015)

    V. Fernández, G. Lavergne P. Berthoumieu

  29. Liquid sheet disintegration at high pressure: An experimental approach.

    CRM (6 June 2014)

    V. Fernández, P. Berthoumieu, G. Lavergne

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