The dynamical state of bars in cluster dwarf galaxies: the cases of NGC 4483 and NGC 4516
Date Issued
2024
Author(s)
Gasparri, Daniele
University of Atacama
University of Atacama
Cuomo, Virginia
University of Atacama
Cuomo
V Morelli
L Aguerri
JAL Corsini
EM Debattista
VP Coccato
L Pizzella
A Boselli
A Buttitta
C de Lorenzo-Cáceres
A Ferrarese
L Gasparri
D Lee
YH Mendez-Abreu
J Roediger
J Zarattini
S
DOI
10.1093/mnras/stad3945
Abstract
Dwarf barred galaxies are the perfect candidates for hosting slowly rotating bars. They are common in dense environments and have a relatively shallow potential well, making them prone to heating by interactions. When an interaction induces bar formation, the bar should rotate slowly. They reside in massive and centrally concentrated dark matter haloes, which slow down the bar rotation through dynamical friction. While predictions suggest that slow bars should be common, measurements of bar pattern speed, using the Tremaine-Weinberg method, show that bars are mostly fast in the local Universe. We present a photometric and kinematic characterization of bars hosted by two dwarf galaxies in the Virgo Cluster, NGC 4483, and NGC 4516. We derive the bar length and strength using the Next Generation Virgo Survey imaging and the circular velocity, bar pattern speed, and rotation rate using spectroscopy from the Multi-Unit Spectroscopic Explorer. Including the previously studied galaxy IC 3167, we compare the bar properties of the three dwarf galaxies with those of their massive counterparts from literature. Bars in the dwarf galaxies are shorter and weaker, and rotate slightly slower with respect to those in massive galaxies. This could be due to a different bar formation mechanism and/or to a large dark matter fraction in the centre of dwarf galaxies. We show that it is possible to push the application of the Tremaine-Weinberg method to the galaxy low-mass regime. C1 [Cuomo, Virginia; Morelli, Lorenzo; Gasparri, Daniele] Univ Atacama, Inst Astron & Ciencias Planetarias, Ave Copayapu 485, Copiapo 1530000, Atacama, Chile. [Morelli, Lorenzo; de Lorenzo-Caceres, Adriana; Mendez-Abreu, Jairo; Zarattini, Stefano] Inst Astrofis Canarias, Calle Via Lactea S-N, E-38205 San Cristobal la Laguna, Tenerife, Spain. [Aguerri, J. Alfonso L.; de Lorenzo-Caceres, Adriana; Mendez-Abreu, Jairo; Zarattini, Stefano] Univ La Laguna, Dept Astrofis, Ave Astrofis Francisco Sanchez S-N, E-38206 San Cristobal la Laguna, Tenerife, Spain. [Corsini, Enrico Maria; Pizzella, Alessandro] Univ Padua, Dipartimento Fis & Astron G Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy. [Corsini, Enrico Maria; Pizzella, Alessandro] INAF Osservatorio Astron Padova, Vicolo Osservatorio 2, I-35122 Padua, Italy. [Debattista, Victor P.] Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England. [Coccato, Lodovico] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany. [Boselli, Alessandro] Aix Marseille Univ, CNRS, CNES, LAM, F-13388 Marseille, France. [Buttitta, Chiara] INAF, Osservatorio Astron Capodimonte, Salita Moiariello 16, I-80131 Naples, Italy. [Ferrarese, Laura; Roediger, Joel] Herzberg Astron & Astrophys Res Ctr, Natl Res Council Canada, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada. [Lee, Yun Hee] Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Daegu 41566, South Korea. [Lee, Yun Hee] Korea Astron & Space Sci Inst KASI, 776 Daedeokdae Ro, Daejeon 34055, South Korea. C3 Universidad de Atacama; Instituto de Astrofisica de Canarias; Universidad de la Laguna; University of Padua; Istituto Nazionale Astrofisica (INAF); University of Central Lancashire; European Southern Observatory; Aix-Marseille Universite; Centre National de la Recherche Scientifique (CNRS); Istituto Nazionale Astrofisica (INAF); National Research Council Canada; Kyungpook National University (KNU); Korea Astronomy & Space Science Institute (KASI)
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