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Valeria Olivares
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Valeria Olivares

Engagement Reporter

AS SEEN ON
The Dallas Morning News

Preston's Summary

Valeria Olivares is an Engagement Reporter at The Dallas Morning News' Education Lab. With a focus on education, she covers topics such as school districts, teacher appreciation, student performance, and child care, while also exploring themes in science and natural sciences. Valeria's work has been featured in prominent outlets including The Seattle Times, NBC DFW, and The Hechinger Report.

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Geo Focus

United States (National)

Coverage Attributes:

Beta
Data Driven: 50 %
Informative: 50 %

Themes Covered:

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Not enough data

Most Recent Topics:

  • Education
  • School Districts
  • Teacher Appreciation
  • Student Performance
  • Child Care
  • School Events

Pitching Insights

Valeria Olivares focuses primarily on local education and government-related announcements in the United States, specifically Texas and Dallas. Her coverage heavily emphasizes governmental announcements and legal policy regulations concerning education.

Given her focus, Valeria is likely to be particularly interested in pitches related to educational policies, school governance issues, student support programs at colleges or universities, as well as developments within local educational institutions.

Pitches involving interviews with relevant government officials, educators or students affected by educational policies within Texas could be of interest to her. Additionally, commentary from experts knowledgeable about state-specific education laws or policies may also capture her attention.

This information evolves through artificial intelligence and human feedback. Improve this profile .

Articles

DM2I

Observations of AGN-driven feedback: dynamics and ionization of the filaments in M87

By: Matteo Fossati, Marie-Lou Gendron-Marsolais, Julie Hlavacek-Larrondo, Alessandro Boselli, Sara Cazzoli, Camille Poitras, Aurora Simionescu, Valeria Olivares, Annabelle Richard-Laferrière, Laura Hermosa Muñoz

We present a comprehensive kinematic and ionization analysis of the warm ionized filaments ( ∼ ∼ K) in M87, the central galaxy of the Virgo cluster, using new integral field spectroscopy from MEGARA (Multi-Espectrógrafo en GTC de Alta Resolución para Astronomía, GTC) and SITELLE (Spectromètre Imageur à Transformée de Fourier pour l'Etude en Long et en Large de raies d'Emission, CFHT). MEGARA targets the southeastern (SE) filaments ( ∼ ∼ 3 kpc from the nucleus) coincident with the only known molecular gas clump, and the far eastern (FE) filament ( ∼ ∼ 15 kpc), spatially isolated within an old radio lobe. SITELLE fully maps the filaments, offering the first complete views of their kinematics and excitation. Combined with archival ALMA (Atacama Large Millimeter Array), MUSE (Multi-Unit Spectroscopic Explorer), and Chandra data, these observations offer a multiphase view of gas dynamics. The filaments display complex motions inconsistent with simple rotation. Velocity structure functions (VSFs) of the warm and cold gas in the central and SE filaments show consistent steep slopes (> 2/3) and flattening on small scales of a few hundred parsecs, possibly suggesting energy injection from Type Ia supernovae, though interpretation is method-limited. The FE filament shows lower VSF amplitude, suggesting less active driving. ALMA CO emission is cospatial and kinematically aligned with the ionized gas, the latter showing broader velocity dispersions. Ionization diagnostics indicate AGN (active galactic nucleus)-related processes (e.g. shocks) dominate, with higher energy excitation near the radio lobes and (lower energy) fossil feedback signatures in the FE filament. Finally, the filaments follow the same strong H α α –X-ray surface brightness correlation seen in other clusters, supporting local thermal coupling between phases. However, the FE filament deviates from this trend, possibly due to uplift from past AGN outbursts or limitations in the analysis method.

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