Jellyfish galaxies with the IllustrisTNG simulations: I. Gas-stripping phenomena in the full cosmological context
We use the IllustrisTNG simulations to study the demographics and properties of jellyfish galaxies in the full cosmological context. By jellyfish galaxies, we mean satellites orbiting in massive groups and clusters that exhibit highly asymmetric distributions of gas and gas tails. In particular, we...
| Main Authors: | , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Oxford University Press (OUP)
2019
|
| Online Access: | https://hdl.handle.net/1721.1/121269 |
| _version_ | 1826195098759593984 |
|---|---|
| author | Yun, Kiyun Pillepich, Annalisa Zinger, Elad Nelson, Dylan Donnari, Martina Joshi, Gandhali Rodriguez-Gomez, Vicente Genel, Shy Weinberger, Rainer Vogelsberger, Mark Hernquist, Lars |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Yun, Kiyun Pillepich, Annalisa Zinger, Elad Nelson, Dylan Donnari, Martina Joshi, Gandhali Rodriguez-Gomez, Vicente Genel, Shy Weinberger, Rainer Vogelsberger, Mark Hernquist, Lars |
| author_sort | Yun, Kiyun |
| collection | MIT |
| description | We use the IllustrisTNG simulations to study the demographics and properties of jellyfish galaxies in the full cosmological context. By jellyfish galaxies, we mean satellites orbiting in massive groups and clusters that exhibit highly asymmetric distributions of gas and gas tails. In particular, we select TNG100 galaxies at low redshifts (z ≤ 0.6) with stellar mass exceeding 10[superscript 9.5] M[subscript ⊙] and with host halo masses in the range 10[superscript 13] ≤ M[subscript 200c]/M[subscript ⊙] ≤ 1014.6. Among more than about 6000 (2600) galaxies with stars (and some gas), we identify 800 jellyfish galaxies by visually inspecting their gas and stellar mass maps in random projections. Namely, about 31 per cent of cluster satellites are found with signatures of ram-pressure stripping and gaseous tails stemming from their main luminous bodies. This is a lower limit: the random orientation entails a loss of about 30 per cent of galaxies that in an optimal projection would otherwise be identified as jellyfish. Furthermore, jellyfish galaxies are more frequent at intermediate and large cluster-centric distances (r/R[subscript 200c] ≳ 0.25), in more massive hosts and at smaller satellite masses, and they typically orbit supersonically. The gaseous tails usually extend in opposite directions to the galaxy trajectory, with no relation between tail orientation and position of the host’s centre. Finally, jellyfish galaxies are late infallers (<2.5–3 Gyr ago, at z = 0) and the emergence of gaseous tails correlates well with the presence of bow shocks in the intracluster medium. Keywords: methods:numerical; galaxies:clusters:general; galaxies:clusters:intracluster medium; galaxies:evolution; galaxies:groups:general; cosmology:theory |
| first_indexed | 2024-09-23T10:07:30Z |
| format | Article |
| id | mit-1721.1/121269 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:07:30Z |
| publishDate | 2019 |
| publisher | Oxford University Press (OUP) |
| record_format | dspace |
| spelling | mit-1721.1/1212692022-09-26T15:52:00Z Jellyfish galaxies with the IllustrisTNG simulations: I. Gas-stripping phenomena in the full cosmological context Yun, Kiyun Pillepich, Annalisa Zinger, Elad Nelson, Dylan Donnari, Martina Joshi, Gandhali Rodriguez-Gomez, Vicente Genel, Shy Weinberger, Rainer Vogelsberger, Mark Hernquist, Lars MIT Kavli Institute for Astrophysics and Space Research We use the IllustrisTNG simulations to study the demographics and properties of jellyfish galaxies in the full cosmological context. By jellyfish galaxies, we mean satellites orbiting in massive groups and clusters that exhibit highly asymmetric distributions of gas and gas tails. In particular, we select TNG100 galaxies at low redshifts (z ≤ 0.6) with stellar mass exceeding 10[superscript 9.5] M[subscript ⊙] and with host halo masses in the range 10[superscript 13] ≤ M[subscript 200c]/M[subscript ⊙] ≤ 1014.6. Among more than about 6000 (2600) galaxies with stars (and some gas), we identify 800 jellyfish galaxies by visually inspecting their gas and stellar mass maps in random projections. Namely, about 31 per cent of cluster satellites are found with signatures of ram-pressure stripping and gaseous tails stemming from their main luminous bodies. This is a lower limit: the random orientation entails a loss of about 30 per cent of galaxies that in an optimal projection would otherwise be identified as jellyfish. Furthermore, jellyfish galaxies are more frequent at intermediate and large cluster-centric distances (r/R[subscript 200c] ≳ 0.25), in more massive hosts and at smaller satellite masses, and they typically orbit supersonically. The gaseous tails usually extend in opposite directions to the galaxy trajectory, with no relation between tail orientation and position of the host’s centre. Finally, jellyfish galaxies are late infallers (<2.5–3 Gyr ago, at z = 0) and the emergence of gaseous tails correlates well with the presence of bow shocks in the intracluster medium. Keywords: methods:numerical; galaxies:clusters:general; galaxies:clusters:intracluster medium; galaxies:evolution; galaxies:groups:general; cosmology:theory 2019-06-13T19:08:03Z 2019-06-13T19:08:03Z 2018-11 2018-11 2019-06-11T11:49:33Z Article http://purl.org/eprint/type/JournalArticle 0035-8711 1365-2966 https://hdl.handle.net/1721.1/121269 Yun, Kiyun et al. "Jellyfish galaxies with the IllustrisTNG simulations: I. Gas-stripping phenomena in the full cosmological context." Monthly Notices of the Royal Astronomical Society 483, 1 (February 2019): 1042-1066 © 2018 The Author(s) en http://dx.doi.org/10.1093/MNRAS/STY3156 Monthly Notices of the Royal Astronomical Society Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Oxford University Press (OUP) arXiv |
| spellingShingle | Yun, Kiyun Pillepich, Annalisa Zinger, Elad Nelson, Dylan Donnari, Martina Joshi, Gandhali Rodriguez-Gomez, Vicente Genel, Shy Weinberger, Rainer Vogelsberger, Mark Hernquist, Lars Jellyfish galaxies with the IllustrisTNG simulations: I. Gas-stripping phenomena in the full cosmological context |
| title | Jellyfish galaxies with the IllustrisTNG simulations: I. Gas-stripping phenomena in the full cosmological context |
| title_full | Jellyfish galaxies with the IllustrisTNG simulations: I. Gas-stripping phenomena in the full cosmological context |
| title_fullStr | Jellyfish galaxies with the IllustrisTNG simulations: I. Gas-stripping phenomena in the full cosmological context |
| title_full_unstemmed | Jellyfish galaxies with the IllustrisTNG simulations: I. Gas-stripping phenomena in the full cosmological context |
| title_short | Jellyfish galaxies with the IllustrisTNG simulations: I. Gas-stripping phenomena in the full cosmological context |
| title_sort | jellyfish galaxies with the illustristng simulations i gas stripping phenomena in the full cosmological context |
| url | https://hdl.handle.net/1721.1/121269 |
| work_keys_str_mv | AT yunkiyun jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext AT pillepichannalisa jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext AT zingerelad jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext AT nelsondylan jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext AT donnarimartina jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext AT joshigandhali jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext AT rodriguezgomezvicente jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext AT genelshy jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext AT weinbergerrainer jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext AT vogelsbergermark jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext AT hernquistlars jellyfishgalaxieswiththeillustristngsimulationsigasstrippingphenomenainthefullcosmologicalcontext |