<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Galaxies: Active | Borja Perez-Diaz | Doctor in Astrophysics</title><link>https://borja-perez-diaz.github.io/tags/galaxies-active/</link><atom:link href="https://borja-perez-diaz.github.io/tags/galaxies-active/index.xml" rel="self" type="application/rss+xml"/><description>Galaxies: Active</description><generator>Hugo Blox Builder (https://hugoblox.com)</generator><language>en-us</language><lastBuildDate>Fri, 19 Jun 2026 00:00:00 +0000</lastBuildDate><image><url>https://borja-perez-diaz.github.io/media/icon_hu7729264130191091259.png</url><title>Galaxies: Active</title><link>https://borja-perez-diaz.github.io/tags/galaxies-active/</link></image><item><title>Beyond the [OIII]4363 auroral line: [NeIII]3868 as a direct tracer of the electron temperature</title><link>https://borja-perez-diaz.github.io/publication/2026-aa-710-l-28-p/</link><pubDate>Fri, 19 Jun 2026 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2026-aa-710-l-28-p/</guid><description/></item><item><title>From "The Cliff" to "Virgil": Mapping the Spectral Diversity of Little Red Dots with JWST/NIRSpec</title><link>https://borja-perez-diaz.github.io/publication/2026-ap-j-1003-96-s/</link><pubDate>Wed, 20 May 2026 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2026-ap-j-1003-96-s/</guid><description/></item><item><title>Chemical enrichment in LINERs from MaNGA: II. Characterizing the shape of the radial metallicity gradients</title><link>https://borja-perez-diaz.github.io/publication/2026-aa-706-a-289-p/</link><pubDate>Wed, 18 Feb 2026 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2026-aa-706-a-289-p/</guid><description/></item><item><title>Sulphur abundances in star-forming regions from optical emission lines: A new approach based on photoionization models consistent with the direct method</title><link>https://borja-perez-diaz.github.io/publication/2025-ojap-704-851253-p/</link><pubDate>Sun, 01 Jun 2025 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2025-ojap-704-851253-p/</guid><description/></item><item><title>Exploring the hardness of the ionizing radiation with the infrared softness diagram: II. Bimodal distributions in both the ionizing continuum slope and the excitation in active galactic nuclei</title><link>https://borja-perez-diaz.github.io/publication/2025-aa-696-a-229-p/</link><pubDate>Tue, 01 Apr 2025 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2025-aa-696-a-229-p/</guid><description/></item><item><title>Chemical enrichment in LINERs from MaNGA: I. Tracing the nuclear abundances of oxygen and nitrogen in LINERs with varied ionizing sources</title><link>https://borja-perez-diaz.github.io/publication/2025-aa-694-a-18-p/</link><pubDate>Sat, 01 Feb 2025 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2025-aa-694-a-18-p/</guid><description/></item><item><title>Chemical abundances and deviations from the solar S/O ratio in the gas-phase interstellar medium of galaxies based on infrared emission lines</title><link>https://borja-perez-diaz.github.io/publication/2024-aa-685-a-168-p/</link><pubDate>Wed, 01 May 2024 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2024-aa-685-a-168-p/</guid><description/></item><item><title>A departure from the mass-metallicity relation in merging galaxies due to an infall of metal-poor gas</title><link>https://borja-perez-diaz.github.io/publication/2024-nat-as-8-368-p/</link><pubDate>Fri, 01 Mar 2024 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2024-nat-as-8-368-p/</guid><description/></item><item><title>Assessing model-based carbon and oxygen abundance derivation from ultraviolet emission lines in AGNs</title><link>https://borja-perez-diaz.github.io/publication/2023-mnras-521-1556-p/</link><pubDate>Mon, 01 May 2023 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2023-mnras-521-1556-p/</guid><description/></item><item><title>Measuring chemical abundances in AGN from infrared nebular lines: HII-CHI-MISTRY-IR for AGN</title><link>https://borja-perez-diaz.github.io/publication/2022-aa-666-a-115-p/</link><pubDate>Sat, 01 Oct 2022 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2022-aa-666-a-115-p/</guid><description/></item><item><title>SOFIA Observations of Far-IR Fine-structure Lines in Galaxies to Measure Metallicity</title><link>https://borja-perez-diaz.github.io/publication/2022-ap-j-926-55-s/</link><pubDate>Tue, 01 Feb 2022 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2022-ap-j-926-55-s/</guid><description/></item><item><title>Chemical abundances in the nuclear region of nearby galaxies from the Palomar Survey</title><link>https://borja-perez-diaz.github.io/publication/2021-mnras-505-4289-p/</link><pubDate>Sun, 01 Aug 2021 00:00:00 +0000</pubDate><guid>https://borja-perez-diaz.github.io/publication/2021-mnras-505-4289-p/</guid><description/></item></channel></rss>