AlFoCS + F3D II: unexpectedly low gas-to-dust ratios in the Fornax galaxy cluster

Abstract

We combine observations from ALMA, ATCA, MUSE, andHerschel to study gas-to-dust ratios in 15 Fornax cluster galaxies detected in the FIR/sub-mm by Herschel and observed by ALMA as part of the ALMA Fornax Cluster Survey (AlFoCS). The sample spans a stellar mass range of 8.3 $\le$ log (M${}_{\ast }$ / M${}_{\odot }$) $\le$ 11.16, and a variety of morphological types. We use gas-phase metallicities derived from MUSE observations (from the Fornax3D survey) to study these ratios as a function of metallicity, and to study dust-to-metal ratios, in a sub-sample of nine galaxies. We find that gas-to-dust ratios in Fornax galaxies are systematically lower than those in field galaxies at fixed stellar mass/metallicity. This implies that a relatively large fraction of the metals in these Fornax systems is locked up in dust, which is possibly due to altered chemical evolution as a result of the dense environment. The low ratios are not only driven by HI deficiencies, but H${}_2$-to-dust ratios are also significantly decreased. This is different in the Virgo cluster, where low gas-to-dust ratios inside the virial radius are driven by low HI-to-dust ratios, while H${}_2$-to-dust ratios are increased. Resolved observations of NGC1436 show a radial increase in H${}_2$-to-dust ratio, and show that low ratios are present throughout the disc. We propose various explanations for the low H${}_2$-to-dust ratios in the Fornax cluster, including the more efficient stripping of H${}_2$ compared to dust, more efficient enrichment of dust in the star formation process, and altered ISM physics in the cluster environment.

Accepted for publication in MNRAS. 21 pages, 12 figures, and 3 tables

References in corpus (48)

• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample
• HyperLEDA. III. The catalogue of extragalactic distances
• The MUSE second-generation VLT instrument
• The evolution of amorphous hydrocarbons in the ISM: dust modelling from a new vantage point
• GALEX-SDSS-WISE Legacy Catalog (GSWLC): Star Formation Rates, Stellar Masses and Dust Attenuations of 700,000 Low-redshift Galaxies
• The ACS Virgo Cluster Survey. XII. The Luminosity Function of Globular Clusters in Early Type Galaxies
• The Cosmic Baryon and Metal Cycles
• A z=0 Multi-wavelength Galaxy Synthesis I: A WISE and GALEX Atlas of Local Galaxies
• SoFiA: a flexible source finder for 3D spectral line data
• Mapping metallicity variations across nearby galaxy disks
• The dust mass in Cassiopeia A from a spatially resolved Herschel analysis
• Effective destruction of CO by cosmic rays: implications for tracing H${}_2$ gas in the Universe
• DustPedia - A Definitive Study of Cosmic Dust in the Local Universe
• Modelling Dust Evolution in Galaxies with a Multiphase, Inhomogeneous ISM
• Destruction of Interstellar Dust in Evolving Supernova Remnant Shock Waves
• Old and young stellar populations in DustPedia galaxies and their role in dust heating
• The dust and gas content of the Crab Nebula
• Ram-pressure stripped molecular gas in the Virgo spiral galaxy NGC 4522
• Dust variations in the diffuse interstellar medium: constraints on Milky Way dust from Planck-HFI observations
• Dust origin in late-type dwarf galaxies: ISM growth vs. type II supernovae
• The Fornax 3D project: unveiling the thick disk origin in FCC 170: signs of accretion?
• High angular resolution ALMA images of dust and molecules in the SN 1987A ejecta
• The SAMI Galaxy Survey: Exploring the gas-phase Mass-Metallicity Relation
• A hidden reservoir of Fe/FeS in interstellar silicates?
• The origin of HI-deficiency in galaxies on the outskirts of the Virgo cluster. I. How far can galaxies bounce out of clusters?
• GASP XXI. Star formation rates in the tails of galaxies undergoing ram-pressure stripping
• The identification of dust heating mechanisms in nearby galaxies using Herschel 160/250 and 250/350 micron surface brightness ratios
• The ISM scaling relations in DustPedia late-type galaxies: A benchmark study for the Local Universe
• The high molecular gas content, and the efficient conversion of neutral into molecular gas, in jellyfish galaxies
• The Fornax3D project: Tracing the assembly history of the cluster from the kinematic and line-strength maps
• Redshift-Independent Distances in the NASA/IPAC Extragalactic Database: Methodology, Content and Use of NED-D
• A blind ATCA HI survey of the Fornax galaxy cluster: properties of the HI detections
• JINGLE -- IV. Dust, HI gas and metal scaling laws in the local Universe
• On the (in)variance of the dust-to-metals ratio in galaxies
• The Fornax 3D project: Thick disks in a cluster environment
• The Herschel Data Processing System - HIPE and Pipelines - Up and Running Since the Start of the Mission
• The dust content of the Crab Nebula
• Optimization of Moment Masking for CO Spectral Line Surveys
• The mass, location and heating of the dust in the Cassiopeia A supernova remnant
• The Fornax Deep Survey with VST. X. The assembly history of the bright galaxies and intra-group light in the Fornax A subgroup
• AlFoCS + Fornax3D: resolved star formation in the Fornax cluster with ALMA and MUSE
• The molecular gas mass of M33
• The Fornax 3D project: dust mix and gas properties in the center of early-type galaxy FCC 167
• An extremely low gas-to-dust ratio in the dust-lane lenticular galaxy NGC 5485
• The Herschel Fornax Cluster Survey II: FIR properties of optically-selected Fornax cluster galaxies
• A High-Resolution, Dust-Selected Molecular Cloud Catalogue of M33, the Triangulum Galaxy
• The Fornax Deep Survey data release 1

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• UV to submillimetre luminosity functions of TNG50 galaxies
• CO($J$=1-0) mapping survey of 64 galaxies in the Fornax cluster with the ALMA Morita array
• The MeerKAT Fornax Survey II. The rapid removal of HI from dwarf galaxies in the Fornax cluster
• The Fornax3D project: The environmental impact on gas metallicity gradients in Fornax cluster galaxies
• NGC 1436: the making of a lenticular galaxy in the Fornax cluster
• The mass-dependent UVJ diagram at cosmic noon: A challenge for galaxy evolution models and dust radiative transfer
• Euclid preparation. Spatially resolved stellar populations of local galaxies with Euclid: a proof of concept using synthetic images with the TNG50 simulation
• Does the solar oxygen abundance change over the solar cycle? An investigation into activity-induced variations of the O I infrared triplet