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Ralf S. Klessen

Heidelberg University · DE
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Area of research
Astronomy and Astrophysics · Instrumentation
Research interest
Research interests include Astrophysics and Star Formation Studies, Stellar, planetary, and galactic studies, Galaxies: Formation, Evolution, Phenomena, and Astronomy and Astrophysical Research.
h-index
96
citations
33,554
works
998
NIH funding
primary concept
email

Recent publications

<i>JWST</i> observations of starbursts: cold clouds and plumes launching in the M 82 outflow
Monthly Notices of the Royal Astronomical Society 2025cited by 16position: lastdoi
Tracing the Earliest Stages of Star and Cluster Formation in 19 Nearby Galaxies with PHANGS-JWST and HST: Compact 3.3 <i>μ</i>m Polycyclic Aromatic Hydrocarbon Emitters and Their Relation to the Optical Census of Star Clusters
The Astrophysical Journal 2025cited by 13position: middledoi
The Rosetta Stone project
Astronomy and Astrophysics 2025cited by 7position: middledoi
PHANGS-JWST: Data-processing Pipeline and First Full Public Data Release
The Astrophysical Journal Supplement Series 2024cited by 41position: middledoi
Testing kinematic distances under a realistic Galactic potential
Astronomy and Astrophysics 2024cited by 31position: middledoi
Massive star cluster formation
Astronomy and Astrophysics 2024cited by 28position: middledoi
Do spiral arms enhance star formation efficiency?
Astronomy and Astrophysics 2024cited by 23position: middledoi
PHANGS-HST Catalogs for ∼100,000 Star Clusters and Compact Associations in 38 Galaxies. I. Observed Properties
The Astrophysical Journal Supplement Series 2024cited by 21position: middledoi
PHANGS-MeerKAT and MHONGOOSE HI observations of nearby spiral galaxies: Physical drivers of the molecular gas fraction, <i>R</i><sub>mol</sub>
Astronomy and Astrophysics 2024cited by 18position: middledoi
Investigating the Drivers of Electron Temperature Variations in H ii Regions with Keck-KCWI and VLT-MUSE
The Astrophysical Journal 2024cited by 16position: middledoi
Metallicity calibrations based on auroral lines from PHANGS–MUSE data
Astronomy and Astrophysics 2024cited by 14position: middledoi
JWST MIRI and NIRCam observations of NGC 891 and its circumgalactic medium
Astronomy and Astrophysics 2024cited by 12position: middledoi
The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies
The Astrophysical Journal Supplement Series 2024cited by 9position: middledoi
The PHANGS–JWST Treasury Survey: Star Formation, Feedback, and Dust Physics at High Angular Resolution in Nearby GalaxieS
The Astrophysical Journal Letters 2023cited by 116position: middledoi
Star Formation Laws and Efficiencies across 80 Nearby Galaxies
The Astrophysical Journal Letters 2023cited by 91position: middledoi
PHANGS–JWST First Results: A Statistical View on Bubble Evolution in NGC 628
The Astrophysical Journal Letters 2023cited by 61position: middledoi
PHANGS–JWST First Results: Destruction of the PAH Molecules in H ii Regions Probed by JWST and MUSE
The Astrophysical Journal Letters 2023cited by 60position: middledoi
PHANGS–JWST First Results: Mid-infrared Emission Traces Both Gas Column Density and Heating at 100 pc Scales
The Astrophysical Journal Letters 2023cited by 52position: middledoi
PHANGS–JWST First Results: Multiwavelength View of Feedback-driven Bubbles (the Phantom Voids) across NGC 628
The Astrophysical Journal Letters 2023cited by 52position: middledoi
PHANGS–JWST First Results: Mapping the 3.3 μm Polycyclic Aromatic Hydrocarbon Vibrational Band in Nearby Galaxies with NIRCam Medium Bands
The Astrophysical Journal Letters 2023cited by 49position: middledoi
PHANGS–JWST First Results: Tracing the Diffuse Interstellar Medium with JWST Imaging of Polycyclic Aromatic Hydrocarbon Emission in Nearby Galaxies
The Astrophysical Journal Letters 2023cited by 45position: middledoi
The Physical Drivers and Observational Tracers of CO-to-H<sub>2</sub> Conversion Factor Variations in Nearby Barred Galaxy Centers
The Astrophysical Journal 2023cited by 45position: middledoi
PHANGS–JWST First Results: Massive Young Star Clusters and New Insights from JWST Observations of NGC 1365
The Astrophysical Journal Letters 2023cited by 45position: middledoi
Binary black hole mergers from population III stars: uncertainties from star formation and binary star properties
Monthly Notices of the Royal Astronomical Society 2023cited by 42position: middledoi
PHANGS–JWST First Results: Duration of the Early Phase of Massive Star Formation in NGC 628
The Astrophysical Journal Letters 2023cited by 38position: middledoi
PHANGS–JWST First Results: Rapid Evolution of Star Formation in the Central Molecular Gas Ring of NGC 1365
The Astrophysical Journal Letters 2023cited by 38position: middledoi
Metal Mixing in the r-process Enhanced Ultrafaint Dwarf Galaxy Reticulum II*
The Astronomical Journal 2023cited by 35position: middledoi
The ALMOND survey: molecular cloud properties and gas density tracers across 25 nearby spiral galaxies with ALMA
Monthly Notices of the Royal Astronomical Society 2023cited by 32position: middledoi
PHANGS–JWST First Results: Dust-embedded Star Clusters in NGC 7496 Selected via 3.3 μm PAH Emission
The Astrophysical Journal Letters 2023cited by 32position: middledoi
PHANGS–JWST First Results: The Dust Filament Network of NGC 628 and Its Relation to Star Formation Activity
The Astrophysical Journal Letters 2023cited by 32position: middledoi

Grants

No grants ingested yet.

Frequent collaborators

Simon C. O. Glover · Heidelberg University12 papers (2015–2024) · 6 papers (2021–2024)Thomas G. Williams · Australian National University6 papers (2021–2024)Kathryn Grasha · Australian National University6 papers (2021–2024)Kathryn Kreckel · Heidelberg University5 papers (2022–2024)Éric Emsellem · Université Claude Bernard Lyon 15 papers (2021–2024)P. Hennebelle · Université Claude Bernard Lyon 15 papers (2018–2025)Brent Groves · Australian National University5 papers (2022–2024)Adam K. Leroy · Columbus Community Clinical Oncology Program4 papers (2021–2023) · 4 papers (2023–2025) · 4 papers (2021–2024)Francesco Belfiore · European Southern Observatory4 papers (2022–2024)J. M. Diederik Kruijssen · AOL (United States)4 papers (2021–2023)L. Testi · University of Illinois Urbana-Champaign4 papers (2023–2025)U. Lebreuilly · Université Claude Bernard Lyon 13 papers (2023–2025) · 3 papers (2021–2022)Janice Lee · University of Arizona3 papers (2022–2023)Andreas Schruba · California Institute of Technology3 papers (2021–2022)M. Boquien · University of California, Davis3 papers (2022–2023)Mélanie Chevance · AOL (United States)3 papers (2022–2023)
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