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arXiv · 2311.13486

Evidence for enhanced star formation rates in z~0.35 cluster galaxies undergoing ram pressure stripping

Benedetta Vulcani·Alessia Moretti·Bianca M. Poggianti·Mario Radovich·Ariel Werle·Marco Gullieuszik·Jacopo Fritz·Cecilia Bacchini·Johan Richard
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Abstract

Ram pressure stripping (RPS) is one of the most invoked mechanisms to explain the observed differences between cluster and field galaxies. In the local Universe, its effect on the galaxy star forming properties has been largely tackled and the general consensus is that this process first compresses the gas available in the galaxy disks, boosting the star formation for a limited amount of time, and then removes the remaining gas leading to quenching. Much less is known on the effect and preponderance of RPS at higher redshift, due to the lack of statistical samples. Exploiting VLT/MUSE observations of galaxies at 0.2 3sigma when considering the SFR occurring in both the tail and disk of galaxies. The enhancement is retrieved also on local scales: considering spatially resolved data, ram pressure stripped galaxies overall have large ΣSFR values, especially for Sigma_*>10^7.5M_sun kpc~2. RPS seems to leave the same imprint on the SFR-M* and Sigma_SFR-Sigma_* relations both in the Local Universe and at z~0.35.

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Benedetta Vulcani, Alessia Moretti, Bianca M. Poggianti, Mario Radovich, Ariel Werle, Marco Gullieuszik, Jacopo Fritz, Cecilia Bacchini, Johan Richard. 2023-11-22. Evidence for enhanced star formation rates in z~0.35 cluster galaxies undergoing ram pressure stripping. https://arxiv.org/abs/2311.13486

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