Constraining star formation in M87 using deep HST UV data

Abstract

We analyzed the deepest Hubble Space Telescope (HST) F275W ultraviolet (UV) imaging of M87 to obtain the most robust constraints on its star formation rate (SFR) and star formation history (SFH). After removing the galaxy continuum and globular clusters, we detected an excess of UV point sources near the center. By comparing their colors to young stellar source (YSS) colors generated by stochastically simulated star formation (SF) for various SFRs and SFHs, we ruled out their origin as a UV-upturn population and identified them as YSS. We found an extremely low SFR of $\sim 2\times 10^{-5}$ M${}_{\odot }$ yr${}^{-1}$ in M87, with evidence of a weak starburst $\sim$125 Myr ago that formed $\sim 1000$ M${}_{\odot }$ of stars. Unlike other cool-core clusters where SF is stronger and directly linked to cooling gas, we found no spatial correlation between YSS and H$\alpha$ filaments. Comparing SF activity with M87's AGN outburst history suggests that recent AGN feedback events ($\lesssim$12 Myr ago) neither triggered nor were associated with any detectable SF, however, earlier outbursts may have triggered weak starbursts. We detected UV filaments co-spatial with H$\alpha$ filaments with similar lengths and widths, though they are obscured by dust near the center. These filaments are likely powered by metal-line emission from collisional ionization, suggesting ongoing low-level precipitation of the intracluster medium. Our results indicate that AGN feedback has quenched SF significantly in M87 for at least 200 Myr, even though some precipitation persists. Additionally, we identified a hotspot created by the counterjet, with the spectral index also constrained.

15 pages, 7 figures and 3 tables. Published in ApJ. Added a reference to data products in v2

References in corpus (65)

• Astropy: A Community Python Package for Astronomy
• Galactic Stellar and Substellar Initial Mass Function
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The Gaia mission
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Gaia Data Release 3: Summary of the content and survey properties
• Observational Evidence of AGN Feedback
• Evolutionary population synthesis: models, analysis of the ingredients and application to high-z galaxies
• Heating Hot Atmospheres with Active Galactic Nuclei
• The Star Formation Rate of Turbulent Magnetized Clouds: Comparing Theory, Simulations, and Observations
• The ACS Virgo Cluster Survey. XIII. SBF Distance Catalog and the Three-Dimensional Structure of the Virgo Cluster
• Mechanical Feedback from Active Galactic Nuclei in Galaxies, Groups, and Clusters
• Intracluster Medium Entropy Profiles for a Chandra Archival Sample of Galaxy Clusters
• A Substantial Population of Low Mass Stars in Luminous Elliptical Galaxies
• M87 at 90cm: A Different Picture
• The Calibration of Monochromatic Far-Infrared Star Formation Rate Indicators
• Reflections of AGN Outbursts in the Gaseous Atmosphere of M87
• Unleashing Positive Feedback: Linking the Rates of Star Formation, Supermassive Black Hole Accretion and Outflows in Distant Galaxies
• Cold molecular gas in cooling flow clusters of galaxies
• Raining on black holes and massive galaxies: the top-down multiphase condensation model
• SLUG - Stochastically Lighting Up Galaxies I: Methods and Validating Tests
• Radiative efficiency, variability and Bondi accretion onto massive black holes: from mechanical to quasar feedback in brightest cluster galaxies
• A Mechanism for Stimulating AGN Feedback by Lifting Gas in Massive Galaxies
• Every BCG with a strong radio AGN has an X-ray cool core: is the cool core - noncool core dichotomy too simple?
• Linking Macro, Meso, and Micro Scales in Multiphase AGN Feeding and Feedback
• SLUG -- Stochastically Lighting Up Galaxies. III: A Suite of Tools for Simulated Photometry, Spectroscopy, and Bayesian Inference with Stochastic Stellar Populations
• Ubiquitous cold and massive filaments in cool core clusters
• Inside the Bondi radius of M87
• Revisiting the Cooling Flow Problem in Galaxies, Groups, and Clusters of Galaxies
• M87 at metre wavelengths: the LOFAR picture
• Driving massive molecular gas flows in central cluster galaxies with AGN feedback
• Optical Emission Line Nebulae in Galaxy Cluster Cores 1: The Morphological, Kinematic and Spectral Properties of the Sample
• Feedback under the microscope II: heating, gas uplift, and mixing in the nearest cluster core
• The Relation Between Cool Cluster Cores and Herschel-Detected Star Formation in Brightest Cluster Galaxies
• A Role for Turbulence in Circumgalactic Precipitation
• FIR colours and SEDs of nearby galaxies observed with Herschel
• Pahs, Ionized Gas, and Molecular Hydrogen in Brightest Cluster Galaxies of Cool Core Clusters of Galaxies
• The nature of filamentary cold gas in the core of the Virgo Cluster
• Infrared and Ultraviolet Star Formation in Brightest Cluster Galaxies in the ACCEPT Sample
• Filamentary Star Formation in NGC 1275
• Jet-induced star formation in 3C 285 and Minkowski Object
• Dissecting the turbulent weather driven by mechanical AGN feedback
• The structure of the Mg II broad line emitting region in Type 1 AGNs
• Partitioning the Outburst Energy of a Low Eddington Accretion Rate AGN at the Center of an Elliptical Galaxy: the Recent 12 Myr History of the Supermassive Black Hole in M87
• The Herschel Virgo Cluster Survey: VI. The far-infrared view of M87
• Galaxy structure from multiple tracers: III. Radial variations in M87's IMF
• ALMA observation of the disruption of molecular gas in M87
• HST imaging of the dusty filaments and nucleus swirl in NGC4696 at the centre of the Centaurus Cluster
• Hidden Cooling Flows in Clusters of Galaxies
• Herschel observations of FIR emission lines in brightest cluster galaxies
• Star Formation in the Outer Filaments of NGC 1275
• Discovery of CIV Emission Filaments in M87
• Hundred Thousand Degree Gas in the Virgo Cluster of Galaxies
• A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE).V. Properties of the ionised gas filament of M87
• AGN duty cycle estimates for the ultra-steep spectrum radio relic VLSS J1431.8+1331
• The Mg II 2797, 2803 emission in low-metallicity star-forming galaxies from the SDSS
• UV Insights into the Complex Populations of M 87 Globular Clusters
• Discovery of a Thirty-Degree Long Ultraviolet Arc in Ursa Major
• Molecular Flows in Contemporary Active Galaxies and the Efficacy of Radio-Mechanical Feedback
• Radio jet-ISM interaction and positive radio-mechanical feedback in Abell 1795
• Hidden Cooling Flows in Clusters of Galaxies III: Accretion onto the Central Black Hole
• FUV line emission, gas kinematics, and discovery of [Fe XXI] $\lambda$1354.1 in the sightline towards a filament in M87
• SLUG IV: A Novel Forward-Modelling Method to Derive the Demographics of Star Clusters
• Collisional excitation of [C II], [O I] and CO in Massive Galaxies