The Radial Orbits of Ram-pressure-stripped Galaxies in Clusters from the GASP Survey
We analyze a sample of 244 ram-pressure-stripped candidate galaxy members within the virial radius of 62 nearby clusters to determine their velocity anisotropy profile β ( r ). We use previously determined mass profiles for the 62 clusters to build an ensemble cluster by stacking the 62 cluster samp...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2024-01-01
|
| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/ad2c09 |
| _version_ | 1797213037633994752 |
|---|---|
| author | Andrea Biviano Bianca M. Poggianti Yara Jaffé Ana C. Lourenço Lorenzo Pizzuti Alessia Moretti Benedetta Vulcani |
| author_facet | Andrea Biviano Bianca M. Poggianti Yara Jaffé Ana C. Lourenço Lorenzo Pizzuti Alessia Moretti Benedetta Vulcani |
| author_sort | Andrea Biviano |
| collection | DOAJ |
| description | We analyze a sample of 244 ram-pressure-stripped candidate galaxy members within the virial radius of 62 nearby clusters to determine their velocity anisotropy profile β ( r ). We use previously determined mass profiles for the 62 clusters to build an ensemble cluster by stacking the 62 cluster samples in projected phase space. We solve the Jeans equation for dynamical equilibrium by two methods, MAMPOSSt and the Jeans inversion technique, and determine β ( r ) both in parametric form and nonparametrically. The two methods consistently indicate that the orbits of the ram-pressure-stripped candidates are increasingly radial with distance from the cluster center, from almost isotropic ( β ≃ 0) at the center, to very radial at the virial radius ( β ≃ 0.7). The orbits of cluster galaxies undergoing ram pressure stripping are similar to those of spiral cluster galaxies but more radially elongated at large radii. |
| first_indexed | 2024-04-24T10:51:55Z |
| format | Article |
| id | doaj.art-3a7c78c8e7d54e7080be85235bee4241 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-04-24T10:51:55Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-3a7c78c8e7d54e7080be85235bee42412024-04-12T08:10:20ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-01965211710.3847/1538-4357/ad2c09The Radial Orbits of Ram-pressure-stripped Galaxies in Clusters from the GASP SurveyAndrea Biviano0https://orcid.org/0000-0002-0857-0732Bianca M. Poggianti1https://orcid.org/0000-0001-8751-8360Yara Jaffé2https://orcid.org/0000-0003-2150-1130Ana C. Lourenço3https://orcid.org/0000-0002-4393-7798Lorenzo Pizzuti4https://orcid.org/0000-0001-5654-7580Alessia Moretti5https://orcid.org/0000-0002-1688-482XBenedetta Vulcani6https://orcid.org/0000-0003-0980-1499INAF-Osservatorio Astronomico di Trieste , via G.B. Tiepolo 11, 34143 Trieste, Italy; IFPU-Institute for Fundamental Physics of the Universe , via Beirut 2, 34014 Trieste, ItalyINAF-Osservatorio Astronomico di Padova , Vicolo Osservatorio 5, I-35122 Padova, ItalyDepartamento de Física, Universidad Técnica Federico Santa María , Avenida España 1680, Valparaíso, Chile; Instituto de Física y Astronomía, Universidad de Valparaíso , Avenida Gran Bretaña 1111, Valparaíso, ChileInstituto de Física y Astronomía, Universidad de Valparaíso , Avenida Gran Bretaña 1111, Valparaíso, Chile; European Southern Observatory (ESO) , Alonso de Cordova 3107, Santiago, ChileDipartimento di Fisica G. Occhialini, Universitá degli Studi di Milano Bicocca , Piazza della Scienza 3, I-20126 Milano, ItalyINAF-Osservatorio Astronomico di Padova , Vicolo Osservatorio 5, I-35122 Padova, ItalyINAF-Osservatorio Astronomico di Padova , Vicolo Osservatorio 5, I-35122 Padova, ItalyWe analyze a sample of 244 ram-pressure-stripped candidate galaxy members within the virial radius of 62 nearby clusters to determine their velocity anisotropy profile β ( r ). We use previously determined mass profiles for the 62 clusters to build an ensemble cluster by stacking the 62 cluster samples in projected phase space. We solve the Jeans equation for dynamical equilibrium by two methods, MAMPOSSt and the Jeans inversion technique, and determine β ( r ) both in parametric form and nonparametrically. The two methods consistently indicate that the orbits of the ram-pressure-stripped candidates are increasingly radial with distance from the cluster center, from almost isotropic ( β ≃ 0) at the center, to very radial at the virial radius ( β ≃ 0.7). The orbits of cluster galaxies undergoing ram pressure stripping are similar to those of spiral cluster galaxies but more radially elongated at large radii.https://doi.org/10.3847/1538-4357/ad2c09Galaxy clustersGalaxy kinematicsGalaxy evolutionRam pressure stripped tails |
| spellingShingle | Andrea Biviano Bianca M. Poggianti Yara Jaffé Ana C. Lourenço Lorenzo Pizzuti Alessia Moretti Benedetta Vulcani The Radial Orbits of Ram-pressure-stripped Galaxies in Clusters from the GASP Survey The Astrophysical Journal Galaxy clusters Galaxy kinematics Galaxy evolution Ram pressure stripped tails |
| title | The Radial Orbits of Ram-pressure-stripped Galaxies in Clusters from the GASP Survey |
| title_full | The Radial Orbits of Ram-pressure-stripped Galaxies in Clusters from the GASP Survey |
| title_fullStr | The Radial Orbits of Ram-pressure-stripped Galaxies in Clusters from the GASP Survey |
| title_full_unstemmed | The Radial Orbits of Ram-pressure-stripped Galaxies in Clusters from the GASP Survey |
| title_short | The Radial Orbits of Ram-pressure-stripped Galaxies in Clusters from the GASP Survey |
| title_sort | radial orbits of ram pressure stripped galaxies in clusters from the gasp survey |
| topic | Galaxy clusters Galaxy kinematics Galaxy evolution Ram pressure stripped tails |
| url | https://doi.org/10.3847/1538-4357/ad2c09 |
| work_keys_str_mv | AT andreabiviano theradialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT biancampoggianti theradialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT yarajaffe theradialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT anaclourenco theradialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT lorenzopizzuti theradialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT alessiamoretti theradialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT benedettavulcani theradialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT andreabiviano radialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT biancampoggianti radialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT yarajaffe radialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT anaclourenco radialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT lorenzopizzuti radialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT alessiamoretti radialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey AT benedettavulcani radialorbitsoframpressurestrippedgalaxiesinclustersfromthegaspsurvey |