Galaxies in voids assemble their stars slowly

Jesús Domínguez-Gómez, Isabel Pérez, Tomás Ruiz-Lara, Reynier F. Peletier, Patricia Sánchez-Blázquez, Ute Lisenfeld, Jesús Falcón-Barroso, Manuel Alcázar-Laynez, María Argudo-Fernández, Guillermo Blázquez-Calero, Hélène Courtois, Salvador Duarte Puertas, Daniel Espada, Estrella Florido, Rubén García-Benito, Andoni Jiménez, Kathryn Kreckel, Mónica Relaño, Laura Sánchez-Menguiano, Thijs van der HulstRien van de Weygaert, Simon Verley, Almudena Zurita

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Galaxies in the Universe are distributed in a web-like structure characterized by different large-scale environments: dense clusters, elongated filaments, sheetlike walls and under-dense regions, called voids1–5. The low density in voids is expected to affect the properties of their galaxies. Indeed, previous studies6–14 have shown that galaxies in voids are, on average, bluer and less massive, and have later morphologies and higher current star formation rates than galaxies in denser large-scale environments. However, it has never been observationally proved that the star formation histories (SFHs) in voids are substantially different from those in filaments, walls and clusters. Here we show that void galaxies have had, on average, slower SFHs than galaxies in denser large-scale environments. We also find two main SFH types present in all the environments: ‘short-timescale’ galaxies are not affected by their large-scale environment at early times but only later in their lives; ‘long-timescale’ galaxies have been continuously affected by their environment and stellar mass. Both types have evolved more slowly in voids than in filaments, walls and clusters.

Original languageEnglish
Pages (from-to)269-271
Number of pages3
Issue number7969
StatePublished - 13 Jul 2023
Externally publishedYes


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