Portrait of Julie Hlavacek-Larrondo

Julie Hlavacek-Larrondo

Associate Academic Member
Associate Professor, Université de Montréal, Department of Physics
Alumni
Research Topics
AI for Science
Applied Machine Learning
Astronomy
Astrophysics
Computational Astrophysics
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Current Students

Jorge Barrera Barrera-Ballesteros
Independent visiting researcher - National Autonomous University of Mexico
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Mathieu Marquis
Master's Research - Université de Montréal
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Olivia Pereira
Master's Research - Université de Montréal
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Marine Prunier
PhD - Université de Montréal
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Benjamin Vigneron
PhD - Université de Montréal
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Publications

Massive Extremely High-velocity Outflow in the Quasar J164653.72+243942.2
Paola Rodríguez Hidalgo
Hyunseop Choi (최현섭)
Patrick B. Hall
Karen M. Leighly
Liliana Flores
Mikel M. Charles
Cora DeFrancesco
Julie Hlavacek-Larrondo
Laurence Perreault-Levasseur
We present the analysis of one of the most extreme quasar outflows found to date in our survey of extremely high velocity outflows (EHVO). J… (see more)164653.72+243942.2 (z ~ 3.04) shows variable CIV1548,1551 absorption at speeds larger than 0.1c, accompanied by SiIV, NV and Lya, and disappearing absorption at lower speeds. We perform absorption measurements using the Apparent Optical Depth method and SimBAL. We find the absorption to be very broad (Δv ~35,100 km/s in the first epoch and ~13,000 km/s in the second one) and fast (vmax ~ -50,200 km/s and -49,000 km/s, respectively). We measure large column densities (
2025-09-03
The Astrophysical Journal (published)
doi.org
arxiv.org