A Modern Search for Wolf-Rayet Stars in the Magellanic Clouds. IV. A Final Census

Abstract

We summarize the results of our four year survey searching for Wolf-Rayet (WR) stars in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC). Over the course of this survey we've discovered 15 new WRs and 12 Of-type stars. In this last year we discovered two rare Of-type stars: an O6.5f?p and an O6nfp in addition to the two new Of?p stars discovered in our first year and the three Onfp stars discovered in our second and third years. However, even more exciting was our discovery of a new type of WR, ones we are calling WN3/O3s due to their spectroscopic signatures. We describe the completeness limits of our survey and demonstrate that we are sensitive to weak-lined WRs several magnitudes fainter than any we have discovered, arguing that there is not a population of fainter WRs waiting to be discovered. We discuss the nature of the WN3/O3s, summarizing the results of our extensive spectroscopy and modeling. We also examine the important claim made by others that the WN3/O3s are isolated compared to other massive stars. We find that if we use a more complete sample of reference massive stars, the WN3/O3s show the same spatial distribution as other early WNs, consistent with a common origin. Finally, we use this opportunity to present the "Fifth Catalog of LMC Wolf-Rayet Stars," which includes revised coordinates and updated spectral types for all 154 known LMC WRs.

arXiv commentaccepted to ApJ

References in corpus (45)

• Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results
• The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 Msun stellar mass limit
• The Galactic O-Star Spectroscopic Survey (GOSSS). II. Bright Southern Stars
• Stellar evolution with rotation XI: Wolf-Rayet star populations at different metallicities
• The Magellanic Clouds Photometric Survey: The Large Magellanic Cloud Stellar Catalog and Extinction Map
• The Galactic O-Star Spectroscopic Survey. I. Classification System and Bright Northern Stars in the Blue-Violet at R~2500
• The VLT-FLAMES Tarantula Survey I: Introduction and observational overview
• The Wolf-Rayet stars in the Large Magellanic Cloud: A comprehensive analysis of the WN class
• Luminous Blue Variables are Antisocial: Their Isolation Implies that they are Kicked Mass Gainers in Binary Evolution
• The Galactic O-Star Spectroscopic Survey (GOSSS). III. 142 additional O-type systems
• The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turn-offs. I. Results from 19 OB Associations in the Magellanic Clouds
• Reduced Wolf-Rayet Line Luminosities at Low Metallicity
• The VLT-FLAMES Tarantula Survey - XI. A census of the hot luminous stars and their feedback in 30 Doradus
• A Survey of Local Group Galaxies Currently Forming Stars: II. UBVRI Photometry of Stars in Seven Dwarfs and a Comparison of the Entire Sample
• Spectral Classification of O2-3.5If*/WN5-7 stars
• A Spectroscopic Survey of WNL Stars in the LMC: General Properties and Binary Status
• Early Results from the Galactic O-Star Spectroscopic Survey: C III Emission Lines in Of Spectra
• The VLT-FLAMES Tarantula Survey XIV. The O-Type Stellar Content of 30 Doradus
• The Deep Lens Survey Transient Search I : Short Timescale and Astrometric Variability
• A Search for Wolf-Rayet Stars in the Small Magellanic Cloud
• A Modern Search for Wolf-Rayet Stars in the Magellanic Clouds: First Results
• The Wolf-Rayet Content of M33
• Properties of WNh stars in the Small Magellanic Cloud: evidence for homogeneous evolution
• The Wolf-Rayet Content of M31
• The Onfp Class in the Magellanic Clouds
• Evidence for quasi-chemically homogeneous evolution of massive stars up to solar metallicity
• The Discovery of a Twelfth Wolf-Rayet Star in the Small Magellanic Cloud
• R144 revealed as a double-lined spectroscopic binary
• A Three-Decade Outburst of the LMC Luminous Blue Variable R127 Draws to a Close
• Newly Discovered Wolf-Rayet and Weak Emission-Line Central Stars of Planetary Nebulae
• The Evolution and Physical Parameters of WN3/O3s: a New Type of Wolf-Rayet Star
• A Modern Search for Wolf-Rayet Stars in the Magellanic Clouds. II. A Second Year of Discoveries
• Spectroscopic study of the N159/N160 complex in the Large Magellanic Cloud
• A Modern Search for Wolf-Rayet Stars in the Magellanic Clouds. III. A Third Year of Discoveries
• 2dF-AAOmega spectroscopy of massive stars in the Magellanic Clouds: The north-eastern region of the Large Magellanic Cloud
• Extreme isolation of WN3/O3 stars and implications for their evolutionary origin as the elusive stripped binaries
• The CHARA Array resolves the long-period Wolf-Rayet binaries WR 137 and WR 138
• The Discovery of a Rare WO-type Wolf-Rayet Star in the Large Magellanic Cloud
• First constraints on the magnetic field strength in extra-Galactic stars: FORS2 observations of Of?p stars in the Magellanic Clouds
• The Evolution of Massive Stars: Bridging the Gap in the Local Group
• Discovery of a new Wolf-Rayet star and a candidate star cluster in the Large Magellanic Cloud with Spitzer
• The massive eclipsing LMC Wolf-Rayet binary BAT99-129. 1 Orbital parameters, hydrogen content and spectroscopic characteristics
• Spectral Variations of Of?p Oblique Magnetic Rotator Candidates in the Magellanic Clouds
• Two new Wolf-Rayet stars in the LMC
• The Of?p stars of the Magellanic Clouds: Are they strongly magnetic?

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• WO-Type Wolf-Rayet Stars: the Last Hurrah of Massive Star Evolution
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• The isolation of Luminous Blue Variables resembles aging B-type supergiants, not the most massive unevolved stars
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• The Wolf-Rayet binaries of the nitrogen sequence in the Large Magellanic Cloud: spectroscopy, orbital analysis, formation, and evolution
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• Populations of evolved massive binary stars in the Small Magellanic Cloud I: Predictions from detailed evolution models
• The Physical Parameters of Four WC-type Wolf-Rayet Stars in the Large Magellanic Cloud: Evidence of Evolution
• Modelling the photometric variability of magnetic massive stars with the Analytical Dynamical Magnetosphere model
• The population synthesis of Wolf-Rayet stars involving binary merger channels
• A Multiwavelength Survey of Wolf-Rayet Nebulae in the Large Magellanic Cloud
• Populations of evolved massive binary stars in the Small Magellanic Cloud II: Predictions from rapid binary evolution
• Photometric Classifications of Evolved Massive Stars: Preparing for the Era of Webb and Roman with Machine Learning
• Newly Discovered Wolf-Rayet Stars in M31
• A Survey for C II Emission-Line Stars in the Large Magellanic Cloud
• He II Emission from Wolf-Rayet Stars as a Tool for Measuring Dust Reddening
• The First Candidate Colliding-Wind Binary in M33
• HST/COS Spectra of the Wind Lines of VFTS 102 and 285
• An extensive spectroscopic time series of three Wolf-Rayet stars -- II. A search for wind asymmetries in the dust-forming WC7 binary WR137
• Giant molecular clouds and their Type classification in M74: Toward understanding star formation and cloud evolution
• Hydrogen-free Wolf-Rayet stars: Helium stars with envelope-inflation structure and rotation
• Constraints on the Binarity of the WN3/O3 Class of Wolf-Rayet Stars
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• Metal-poor single Wolf-Rayet stars: The interplay of optically thick winds and rotation
• Detection of extragalactic magnetic massive stars
• Search for new Galactic Wolf-Rayet stars using Gaia DR3. I. Candidate selection and the follow-up of the bright sample
• The Stripped-Star Ultraviolet Magellanic Cloud Survey (SUMS): The UV Photometric Catalog and Stripped Star Candidate Selection
• Testing Evolutionary Models with Red Supergiant and Wolf-Rayet Populations
• Kinematics of Wolf-Rayet Stars in the LMC: Clues to Subtype Origins
• SDSS-V LVM: Detectability of Wolf-Rayet stars and their He II ionizing flux in low-metallicity environments I. The weak-lined, early-type WN3 stars in the SMC