UV and Hα HST Observations of Six GASP Jellyfish Galaxies

Marco Gullieuszik; Eric Giunchi; Bianca M. Poggianti; Alessia Moretti; Claudia Scarlata; Daniela Calzetti; Ariel Werle; Anita Zanella; Mario Radovich; Callum Bellhouse; Daniela Bettoni; Andrea Franchetto; Jacopo Fritz; Yara L. Jaffé; Sean L. McGee; Matilde Mingozzi; Alessandro Omizzolo; Stephanie Tonnesen; Marc Verheijen; Benedetta Vulcani

doi:10.3847/1538-4357/acb59b

UV and Hα HST Observations of Six GASP Jellyfish Galaxies

Marco Gullieuszik, Eric Giunchi, Bianca M. Poggianti, Alessia Moretti, Claudia Scarlata, Daniela Calzetti, Ariel Werle, Anita Zanella, Mario Radovich, Callum Bellhouse, Daniela Bettoni, Andrea Franchetto, Jacopo Fritz, Yara L. Jaffé, Sean L. McGee, Matilde Mingozzi, Alessandro Omizzolo, Stephanie Tonnesen, Marc Verheijen, Benedetta Vulcani

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Abstract

Star-forming, Hα-emitting clumps are found embedded in the gaseous tails of galaxies undergoing intense ram pressure stripping in galaxy clusters, so-called jellyfish galaxies. These clumps offer a unique opportunity to study star formation under extreme conditions, in the absence of an underlying disk and embedded within the hot intracluster medium. Yet, a comprehensive, high-spatial-resolution study of these systems is missing. We obtained UVIS/Hubble Space Telescope (HST) data to observe the first statistical sample of clumps in the tails and disks of six jellyfish galaxies from the GASP survey; we used a combination of broadband (UV to I) filters and a narrowband Hα filter. HST observations are needed to study the sizes, stellar masses, and ages of the clumps and their clustering hierarchy. These observations will be used to study the clump scaling relations and the universality of the star formation process, and to verify whether a disk is irrelevant, as hinted at by results from jellyfish galaxies. This paper presents the observations, data reduction strategy, and some general results based on the preliminary data analysis. The high spatial resolution of UVIS gives an unprecedentedly sharp view of the complex structure of the inner regions of the galaxies and of the substructures in the galaxy disks. We found clear signatures of stripping in regions very close in projection to the galactic disk. The star-forming regions in the stripped tails are extremely bright and compact and we did not detect a significant number of star-forming clumps in regions where MUSE did not detect any. The paper finally presents the development plan for the project.

Original language	English (US)
Article number	54
Journal	Astrophysical Journal
Volume	945
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/acb59b
State	Published - Mar 1 2023
Externally published	Yes

Bibliographical note

Funding Information:
We would like to sincerely thank the referee for their constructive comments that helped us to improve the quality of our manuscript. We warmly thank Jay Anderson, Crystal Mannfolk, and the HST Help Desk staff for the valuable support. This research is based on observations made with the NASA/ESA Hubble Space Telescope obtained from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 526555. These observations are associated with program GO-16223. This research made use of Astropy, a community-developed core Python package for Astronomy (Astropy Collaboration, The Astropy Collaboration ). This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No. 833824). and “INAF main-streams” funding program (PI B. Vulcani). Y.J. acknowledges financial support from ANID BASAL Project No. FB210003.

Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.

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Gullieuszik, M., Giunchi, E., Poggianti, B. M., Moretti, A., Scarlata, C., Calzetti, D., Werle, A., Zanella, A., Radovich, M., Bellhouse, C., Bettoni, D., Franchetto, A., Fritz, J., Jaffé, Y. L., McGee, S. L., Mingozzi, M., Omizzolo, A., Tonnesen, S., Verheijen, M., & Vulcani, B. (2023). UV and Hα HST Observations of Six GASP Jellyfish Galaxies. Astrophysical Journal, 945(1), Article 54. https://doi.org/10.3847/1538-4357/acb59b

Gullieuszik, M, Giunchi, E, Poggianti, BM, Moretti, A, Scarlata, C, Calzetti, D, Werle, A, Zanella, A, Radovich, M, Bellhouse, C, Bettoni, D, Franchetto, A, Fritz, J, Jaffé, YL, McGee, SL, Mingozzi, M, Omizzolo, A, Tonnesen, S, Verheijen, M & Vulcani, B 2023, 'UV and Hα HST Observations of Six GASP Jellyfish Galaxies', Astrophysical Journal, vol. 945, no. 1, 54. https://doi.org/10.3847/1538-4357/acb59b

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title = "UV and Hα HST Observations of Six GASP Jellyfish Galaxies",

abstract = "Star-forming, Hα-emitting clumps are found embedded in the gaseous tails of galaxies undergoing intense ram pressure stripping in galaxy clusters, so-called jellyfish galaxies. These clumps offer a unique opportunity to study star formation under extreme conditions, in the absence of an underlying disk and embedded within the hot intracluster medium. Yet, a comprehensive, high-spatial-resolution study of these systems is missing. We obtained UVIS/Hubble Space Telescope (HST) data to observe the first statistical sample of clumps in the tails and disks of six jellyfish galaxies from the GASP survey; we used a combination of broadband (UV to I) filters and a narrowband Hα filter. HST observations are needed to study the sizes, stellar masses, and ages of the clumps and their clustering hierarchy. These observations will be used to study the clump scaling relations and the universality of the star formation process, and to verify whether a disk is irrelevant, as hinted at by results from jellyfish galaxies. This paper presents the observations, data reduction strategy, and some general results based on the preliminary data analysis. The high spatial resolution of UVIS gives an unprecedentedly sharp view of the complex structure of the inner regions of the galaxies and of the substructures in the galaxy disks. We found clear signatures of stripping in regions very close in projection to the galactic disk. The star-forming regions in the stripped tails are extremely bright and compact and we did not detect a significant number of star-forming clumps in regions where MUSE did not detect any. The paper finally presents the development plan for the project.",

author = "Marco Gullieuszik and Eric Giunchi and Poggianti, {Bianca M.} and Alessia Moretti and Claudia Scarlata and Daniela Calzetti and Ariel Werle and Anita Zanella and Mario Radovich and Callum Bellhouse and Daniela Bettoni and Andrea Franchetto and Jacopo Fritz and Jaff{\'e}, {Yara L.} and McGee, {Sean L.} and Matilde Mingozzi and Alessandro Omizzolo and Stephanie Tonnesen and Marc Verheijen and Benedetta Vulcani",

note = "Funding Information: We would like to sincerely thank the referee for their constructive comments that helped us to improve the quality of our manuscript. We warmly thank Jay Anderson, Crystal Mannfolk, and the HST Help Desk staff for the valuable support. This research is based on observations made with the NASA/ESA Hubble Space Telescope obtained from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 526555. These observations are associated with program GO-16223. This research made use of Astropy, a community-developed core Python package for Astronomy (Astropy Collaboration, The Astropy Collaboration ). This project has received funding from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation program (grant agreement No. 833824). and “INAF main-streams” funding program (PI B. Vulcani). Y.J. acknowledges financial support from ANID BASAL Project No. FB210003. Publisher Copyright: {\textcopyright} 2023. The Author(s). Published by the American Astronomical Society.",

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AU - Gullieuszik, Marco

AU - Giunchi, Eric

AU - Poggianti, Bianca M.

AU - Moretti, Alessia

AU - Scarlata, Claudia

AU - Calzetti, Daniela

AU - Werle, Ariel

AU - Zanella, Anita

AU - Radovich, Mario

AU - Bellhouse, Callum

AU - Bettoni, Daniela

AU - Franchetto, Andrea

AU - Fritz, Jacopo

AU - Jaffé, Yara L.

AU - McGee, Sean L.

AU - Mingozzi, Matilde

AU - Omizzolo, Alessandro

AU - Tonnesen, Stephanie

AU - Verheijen, Marc

AU - Vulcani, Benedetta

N1 - Funding Information: We would like to sincerely thank the referee for their constructive comments that helped us to improve the quality of our manuscript. We warmly thank Jay Anderson, Crystal Mannfolk, and the HST Help Desk staff for the valuable support. This research is based on observations made with the NASA/ESA Hubble Space Telescope obtained from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 526555. These observations are associated with program GO-16223. This research made use of Astropy, a community-developed core Python package for Astronomy (Astropy Collaboration, The Astropy Collaboration ). This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No. 833824). and “INAF main-streams” funding program (PI B. Vulcani). Y.J. acknowledges financial support from ANID BASAL Project No. FB210003. Publisher Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

PY - 2023/3/1

Y1 - 2023/3/1

N2 - Star-forming, Hα-emitting clumps are found embedded in the gaseous tails of galaxies undergoing intense ram pressure stripping in galaxy clusters, so-called jellyfish galaxies. These clumps offer a unique opportunity to study star formation under extreme conditions, in the absence of an underlying disk and embedded within the hot intracluster medium. Yet, a comprehensive, high-spatial-resolution study of these systems is missing. We obtained UVIS/Hubble Space Telescope (HST) data to observe the first statistical sample of clumps in the tails and disks of six jellyfish galaxies from the GASP survey; we used a combination of broadband (UV to I) filters and a narrowband Hα filter. HST observations are needed to study the sizes, stellar masses, and ages of the clumps and their clustering hierarchy. These observations will be used to study the clump scaling relations and the universality of the star formation process, and to verify whether a disk is irrelevant, as hinted at by results from jellyfish galaxies. This paper presents the observations, data reduction strategy, and some general results based on the preliminary data analysis. The high spatial resolution of UVIS gives an unprecedentedly sharp view of the complex structure of the inner regions of the galaxies and of the substructures in the galaxy disks. We found clear signatures of stripping in regions very close in projection to the galactic disk. The star-forming regions in the stripped tails are extremely bright and compact and we did not detect a significant number of star-forming clumps in regions where MUSE did not detect any. The paper finally presents the development plan for the project.

AB - Star-forming, Hα-emitting clumps are found embedded in the gaseous tails of galaxies undergoing intense ram pressure stripping in galaxy clusters, so-called jellyfish galaxies. These clumps offer a unique opportunity to study star formation under extreme conditions, in the absence of an underlying disk and embedded within the hot intracluster medium. Yet, a comprehensive, high-spatial-resolution study of these systems is missing. We obtained UVIS/Hubble Space Telescope (HST) data to observe the first statistical sample of clumps in the tails and disks of six jellyfish galaxies from the GASP survey; we used a combination of broadband (UV to I) filters and a narrowband Hα filter. HST observations are needed to study the sizes, stellar masses, and ages of the clumps and their clustering hierarchy. These observations will be used to study the clump scaling relations and the universality of the star formation process, and to verify whether a disk is irrelevant, as hinted at by results from jellyfish galaxies. This paper presents the observations, data reduction strategy, and some general results based on the preliminary data analysis. The high spatial resolution of UVIS gives an unprecedentedly sharp view of the complex structure of the inner regions of the galaxies and of the substructures in the galaxy disks. We found clear signatures of stripping in regions very close in projection to the galactic disk. The star-forming regions in the stripped tails are extremely bright and compact and we did not detect a significant number of star-forming clumps in regions where MUSE did not detect any. The paper finally presents the development plan for the project.

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ER -

UV and Hα HST Observations of Six GASP Jellyfish Galaxies

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