• Intergalactic medium (IGM) 

• Circumgalactic medium (CGM) and galaxy evolution

• Large scale structure of the Universe

• Fast radio bursts (FRBs); Gamma-ray bursts (GRBs); Active galactic nuclei (AGNs)

• Cosmology XX
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I am a Chilean astrophysicist working in the Instituto de Física at Pontificia Universidad Católica de Valparaiso (PUCV). My main research interest is on the connection between the intergalactic medium (IGM) and galaxies, in the context of the large-scale structure of the Universe. I am mainly focused on how this relationship depends on cosmic environment (voids, filaments, groups, clusters), and cosmic time (early and late Universe). Ultimately, I wish to test the current cosmological paradigm prediction that baryonic matter follows the cosmic web shaped by dark matter and dark energy.

I obtained my B.Sc. and M.Sc. degrees in Astronomy at Universidad de Chile; my M.Sc. thesis was on Absorption systems in optical spectra of gamma-ray bursts (GRBs) afterglows, under supervision of Prof. Sebastian Lopez. Then I moved to the UK, where I obtained my Ph.D. degree in Astrophysics at University of Durham; my Ph.D. thesis was on The relationship between the intergalactic medium and galaxies under supervision of Prof. Simon L. Morris and Prof. Tom Theuns. My first postdoctoral position was at the University of California, Santa Cruz where I worked in close collaboration with Prof. J Xavier Prochaska and the IMPS group. I then moved back to Chile, for my second postdoctoral position at the Millennium Institute of Astrophysics being hosted by the Pontificia Universidad Católica de Chile in Santiago. In 2017, I moved to Valparaíso as a faculty at PUCV where I have been working towards developing astronomy and astrophysics as part of its Instituto de Física.

During my professional career, I have been the PI on multiple world-class telescope projects, including five on the Hubble Space Telescope (HST) and several on the Very Large Telescope (VLT), Gemini, Magellan, among others. Recently, I received the 2021 AAAS Newcomb Cleveland Prize shared among co-authors of the paper “A single fast radio burst localized to a massive galaxy at cosmological distance” published in Science. 

Recent research projects

• Tomography of the gaseous universe using gravitational lenses - FONDECYT Regular 2023 No. 1231187 (Co-I)

• Characterizing the environments and foreground structures of well-localized fast radio bursts - FONDECYT Iniciación 2019 No. 11191217 (PI)

• Witnessing the baryon cycle of galaxies through gravitational-arc tomography - FONDECYT Regular 2019 No. 1191232 (Co-I)

Ongoing collaborations

• Fast and Fortunate for Fast Radio Burst Follow-up (F4)

• Gravitational-arc tomography (Arctomo)

• The Commensal Real-time ASKAP Fast Transient Survey (CRAFT)

• Chilean Cluster Galaxy Evolution Survey (CHANCES)

• Valparaíso Extra-Galactic Astronomy (VEGA)

• Curriculum Vitae (CV): extended version

• Updated publications list: NASA ADS, Google Scholar, ORCiD

• "Optical follow-up of FRBs: past/present/future challenges", FRB2023 conference

• "The circumgalactic medium revealed by gravitational-arc tomography", CGI seminar 2022

• "Summary of article Tejos et al. 2021 (4 min)", Galactic Atmospheres 2022

• "High-cadence optical limits on the repeating FRB 180916", FRB2021 conference

• "IFU Tutorial", KITP Halo21 conference

• "Optical Follow-up of Fast Radio Bursts", FRB2020 conference

• Video (27/12/23): SurTV: Juntos Otra Mañana (matinal)

• Nota de prensa (27/12/23): BioBioChile: Astrónomos chilenos logran medir por primera vez el tamaño de las nubes que rodean a las galaxias

• Nota de prensa (27/12/23): La Nación: Cientificos chilenos lideran impresionante hallazgo sobre las nubes que rodean las galaxias

• Nota de prensa (12/12/23): El Mercurio de Antofagasta: Basura espacial y meteoritos

• Entrevista (07/12/23): El Mostrador: Fast Radio Bursts

• Entrevista (14/01/22): La Tercera: Observatorio Mancomunado de Astrofísica

• Video (13/05/21): Zoom a la Actualidad Internacional

• Video (10/02/21): AAAS Newcomb Cleveland Prize 2020

• Video (31/07/20): Half the universe was missing... until now (by Veritasium)

• Webinar (15/07/20): La estructura a gran escala del Universo

• Entrevista (24/01/20): La Tercera: Medio Circungalactico

• Entrevista (10/08/19): El Mercurio de Valparaiso: Fast Radio Bursts

• Entrevista (08/08/19): VRIEA PUCV: Fast Radio Bursts

• Video (02/07/19): SoyChile: Eclipse Solar en Chile

• Press release (27/06/19): Gemini Observatory: Fast Radio Bursts

• Video (06/06/19): Un café con Valparaiso: Eclipses

• Entrevista (01/02/18): El Mostrador: Astrónomos chilenos desarrollan nueva técnica para estudiar el Halo de las Galaxias

• Nota de prensa (01/02/18): El Mercurio: Gravitational-arc tomography

• Entrevista (01/10/17): El Mercurio de Valparaiso: Medio Intergaláctico

• Nota de divulgación MAS (07/05/17): Nuestra investigación: En busca de los bariones perdidos del Universo

• Entrevista (27/08/14): La Tercera: Medio Intergaláctico