LoTSS Jellyfish Galaxies III. The first identification of jellyfish galaxies in the Perseus cluster

Abstract

In this paper we report the first identification of jellyfish galaxies in the Perseus cluster (Abell 426). We identified four jellyfish galaxies (LEDA 2191078, MCG +07-07-070, UGC 2654, UGC 2665) within the central $2^{\circ }\times 2^{\circ }$ ($2.6\mathrm{Mpc}\times 2.6\mathrm{Mpc}$) of Perseus based on the presence of one-sided radio continuum tails that were detected at $144\mathrm{MHz}$ by the LOw Frequency ARray (LOFAR). The observed radio tails, as well as the orientation of morphological features in the rest-frame optical, are consistent with these four galaxies being impacted by ram pressure stripping as they orbit through the Perseus intracluster medium. By combining the LOFAR imaging at 144 MHz with 344 MHz imaging from the Karl G. Jansky Very Large Array, we derived spectral indices for the disks and the stripped tails of these jellyfish galaxies. We show that the spectral indices over the galaxy disks are quite flat, while the indices of the stripped tails are substantially steeper. We also identified a number of compact $\mathrm{H}\alpha +[\mathrm{NII}]$ sources with narrowband imaging from the Isaac Newton Telescope. These sources are brighter along the leading side of the galaxy (i.e., opposite to the direction of the stripped tail), which is consistent with ram pressure induced star formation. Lastly, consistent with previous works in other clusters, we find that these jellyfish galaxies show enhanced radio luminosities for their observed star formation rates. Given the small distance to the Perseus cluster ($D\sim 70\mathrm{Mpc}$, $1^{\prime \prime }\simeq 340\mathrm{pc}$), these galaxies are excellent candidates for multiwavelength follow-up observations to probe the impact of ram pressure stripping on galaxy star formation at subkiloparsec scales.

14 pages, 7 figures, accepted for publication in A&A

References in corpus (22)

• The Gaia mission
• WSClean: an implementation of a fast, generic wide-field imager for radio astronomy
• The LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release
• Strangulation as the primary mechanism for shutting down star formation in galaxies
• 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
• What do we learn from IRAC observations of galaxies at 2 < z < 3.5?
• An optimized algorithm for multi-scale wideband deconvolution of radio astronomical images
• Baryons at the Edge of the X-ray Brightest Galaxy Cluster
• LoCuSS: The slow quenching of star formation in cluster galaxies and the need for pre-processing
• Cold gas stripping in satellite galaxies: from pairs to clusters
• The LOFAR Two Meter Sky Survey: Deep Fields, I -- Direction-dependent calibration and imaging
• LOFAR/H-ATLAS: The low-frequency radio luminosity - star-formation rate relation
• Strange filamentary structures ("fireballs") around a merger galaxy in the Coma cluster of galaxies
• LoTSS jellyfish galaxies: II. Ram pressure stripping in groups versus clusters
• Ram pressure stripping candidates in the Coma Cluster: Evidence for enhanced star formation
• The Different Environmental Dependencies of Star-formation for Giant and Dwarf Galaxies
• VERTICO: The Virgo Environment Traced In CO Survey
• Hubble Space Telescope survey of the Perseus Cluster - I: The structure and dark matter content of cluster dwarf spheroidals
• Synchrotron spectral index and interstellar medium densities of star-forming galaxies
• The better half -- Asymmetric star-formation due to ram pressure in the EAGLE simulations
• Cluster induced quenching of galaxies in the massive cluster XMMXCSJ2215.9-1738 at z~1.5 traced by enhanced metallicities inside half R200

Cited by in corpus (2)

• The Planck clusters in the LOFAR sky. I. LoTSS-DR2: new detections and sample overview
• Stress-Testing Cosmic Ray Physics: The Impact of Cosmic Rays on the Surviving Disk of Ram Pressure Stripped Galaxies