LoTSS Jellyfish Galaxies IV: Enhanced Star Formation on the Leading Half of Cluster Galaxies and Gas Compression in IC3949

Abstract

With MaNGA integral field spectroscopy, we present a resolved analysis of star formation for 29 jellyfish galaxies in nearby clusters, identified from radio continuum imaging taken by the Low Frequency Array. Simulations predict enhanced star formation on the "leading half" of galaxies undergoing ram pressure stripping, and in this work we report observational evidence for this elevated star formation. The dividing line (through the galaxy center) that maximizes this star formation enhancement is systematically tied to the observed direction of the ram pressure stripped tail, suggesting a physical connection between ram pressure and this star formation enhancement. We also present a case study on the distribution of molecular gas in one jellyfish galaxy from our sample, IC3949, using ALMA CO J=1-0, HCN J=1-0, and HCO${}^{+}$ J=1-0 observations from the ALMaQUEST survey. The ${\mathrm{H}}_2$ depletion time (as traced by CO) in IC3949 ranges from $\sim 1\mathrm{Gyr}$ in the outskirts of the molecular gas disk to $\sim 11\mathrm{Gyr}$ near the galaxy center. IC3949 shows a clear region of enhanced star formation on the leading half of the galaxy where the average depletion time is $\sim 2.7\mathrm{Gyr}$, in line with the median value for the galaxy on the whole. Dense gas tracers, HCN and HCO${}^{+}$, are only detected at the galaxy center and on the leading half of IC3949. Our results favour a scenario in which ram pressure compresses the interstellar medium, promoting the formation of molecular gas that in turn fuels a localized increase of star formation.

16 pages, 10 figures, accepted for publication in ApJ

References in corpus (53)

• Array Programming with NumPy
• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• The Host Galaxies and Classification of Active Galactic Nuclei
• Mass and environment as drivers of galaxy evolution in SDSS and zCOSMOS and the origin of the Schechter function
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• Strangulation as the primary mechanism for shutting down star formation in galaxies
• The Critical Density and the Effective Excitation Density of Commonly Observed Molecular Dense Gas Tracers
• The LOFAR Two-metre Sky Survey -- V. Second data release
• GALEX-SDSS-WISE Legacy Catalog (GSWLC): Star Formation Rates, Stellar Masses and Dust Attenuations of 700,000 Low-redshift Galaxies
• Diagnostics of irradiated dense gas in galaxy nuclei. II. A grid of XDR and PDR models
• CMasher: Scientific colormaps for making accessible, informative and 'cmashing' plots
• Ram Pressure Stripping in High-Density Environments
• A multi-transition HCN and HCO+ study of 12 nearby active galaxies: AGN versus SB environments
• Cold gas stripping in satellite galaxies: from pairs to clusters
• The Dawes Review 9: The role of cold gas stripping on the star formation quenching of satellite galaxies
• The Correlation of Star Formation Quenching with Internal Galaxy Properties and Environment
• Abundant molecular gas and inefficient star formation in intracluster regions: Ram pressure stripped tail of the Norma galaxy ESO137-001
• Galaxy groups in the low-redshift Universe
• The Canada-France Imaging Survey: First results from the u-band component
• The effect of ram pressure on the molecular gas of galaxies: three case studies in the Virgo cluster
• GASP XXIII: A jellyfish galaxy as an astrophysical laboratory of the baryonic cycle
• LoTSS jellyfish galaxies: I. Radio tails in low redshift clusters
• GASP. XXII The molecular gas content of the JW100 jellyfish galaxy at z~0.05: does ram pressure promote molecular gas formation?
• Galaxy And Mass Assembly (GAMA): Environmental Quenching of Centrals and Satellites in Groups
• LoTSS jellyfish galaxies: II. Ram pressure stripping in groups versus clusters
• pyFIT3D and pyPipe3D -- The new version of the Integral Field Spectroscopy data analysis pipeline
• Ram pressure stripping candidates in the Coma Cluster: Evidence for enhanced star formation
• VERTICO: The Virgo Environment Traced In CO Survey
• A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).IX. The effects of ram pressure stripping down to the scale of individual HII regions in the dwarf galaxy IC 3476
• The high molecular gas content, and the efficient conversion of neutral into molecular gas, in jellyfish galaxies
• ALMaQUEST -- IV. The ALMA-MaNGA QUEnching and STar formation (ALMaQUEST) Survey
• GASP XXX. The spatially resolved SFR-Mass relation in stripping galaxies in the local universe
• Quenching low-mass satellite galaxies: evidence for a threshold ICM density
• The better half -- Asymmetric star-formation due to ram pressure in the EAGLE simulations
• A universal correlation between warm and hot gas in the stripped tails of cluster galaxies
• VERTICO II: effects of HI-identified environmental mechanisms on molecular gas
• LoTSS Jellyfish Galaxies III. The first identification of jellyfish galaxies in the Perseus cluster
• Jellyfish galaxy candidates in MACS J0717.5+3745 and thirty-nine other clusters of the DAFT/FADA and CLASH surveys
• Cluster induced quenching of galaxies in the massive cluster XMMXCSJ2215.9-1738 at z~1.5 traced by enhanced metallicities inside half R200
• Kiloparsec-scale Variations in the Star Formation Efficiency of Dense Gas: the Antennae Galaxies (NGC 4038/39)
• NGC 2276: a remarkable galaxy with a large number of ULXs
• Evidence of ram pressure stripping of WLM, a dwarf galaxy far away from any large host galaxy
• Two Orders of Magnitude Variation in the Star Formation Efficiency Across the Pre-Merger Galaxy NGC 2276
• ALMA/ACA CO Survey of the IC 1459 and NGC 4636 Groups: Environmental Effects on the Molecular Gas of Group Galaxies
• Ram pressure stripping of HI-rich galaxies infalling into massive clusters
• High-resolution, High-sensitivity, Low-frequency uGMRT View of Coma Cluster of Galaxies
• Ram Pressure Candidates in UNIONS
• Understanding if molecular ratios can be used as diagnostics of AGN and starburst activity: The case of NGC 1068
• Enhanced Star Formation Activity of Extreme Jellyfish Galaxies in Massive Clusters and the Role of Ram Pressure Stripping
• ALMA Observations of HCO+ and HCN Emission in a massive star forming region N55 of the Large Magellanic Cloud
• Dense Gas and Star Formation in Nearby Infrared Bright Galaxies: APEX survey of HCN and HCO+ J=2-1
• Deepest far ultraviolet view of a central field in the Coma cluster by AstroSat UVIT
• A GMOS/IFU Study of Jellyfish Galaxies in Massive Clusters

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• Radio continuum tails in ram pressure-stripped spiral galaxies: experimenting with a semi-empirical model in Abell 2255
• Euclid: Early Release Observations -- Overview of the Perseus cluster and analysis of its luminosity and stellar mass functions
• ViCTORIA project: The LOFAR HBA Virgo Cluster Survey
• Chemical evolution of local post-starburst galaxies: Implications for the mass-metallicity relation
• FAST-ASKAP Synergy: Quantifying Coexistent Tidal and Ram Pressure Strippings in the NGC 4636 Group
• VERTICO VI: Cold-gas asymmetries in Virgo cluster galaxies
• Differences in the Physical Properties of Satellite Galaxies within Relaxed and Disturbed Galaxy Groups and Clusters
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• Jellyfish galaxies with the IllustrisTNG simulations -- Supermassive black hole activity in dense environments with ram-pressure stripped satellites
• Fading in the Flow: Suppression of cold gas growth in expanding galactic outflows
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• Dashing through the cluster: An X-ray to radio view of UGC 10420 undergoing ram-pressure stripping