Search Results - "Neugent, Kathryn F."

A Modern Search for Wolf-Rayet Stars in the Magellanic Clouds. IV. A Final Census by Neugent, Kathryn F., Massey, Philip, Morrell, Nidia

“…Abstract We summarize the results of our 4 yr survey searching for Wolf-Rayet (WR) stars in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud. Over…”
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The Time-averaged Mass-loss Rates of Red Supergiants as Revealed by Their Luminosity Functions in M31 and M33 by Massey, Philip, Neugent, Kathryn F., Ekström, Sylvia, Georgy, Cyril, Meynet, Georges

“…Abstract Mass loss in red supergiants (RSGs) is generally recognized to be episodic, but mass-loss prescriptions fail to reflect this. Evolutionary models show…”
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Newly Discovered Wolf–Rayet Stars in M31 by Neugent, Kathryn F., Massey, Philip

“…Abstract The evolved massive star populations of the Local Group galaxies are generally thought to be well understood. However, recent work has suggested that…”
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A Survey for C ii Emission-line Stars in the Large Magellanic Cloud. II. Final Results and the Origin of C ii Emission in [WC] Spectra by Margon, Bruce, Morrell, Nidia, Massey, Philip, Neugent, Kathryn F., Williams, Robert

“…Abstract We present the final results of an imaging and spectroscopic search for stars in the Large Magellanic Cloud (LMC) with C ii λλ 7231, 7236 emission…”
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Constraints on the Binarity of the WN3/O3 Class of Wolf–Rayet Stars by Massey, Philip, Neugent, Kathryn F., Morrell, Nidia I.

“…Abstract The WN3/O3 Wolf–Rayet (WR) stars were discovered as part of our survey for WRs in the Magellanic Clouds. The WN3/O3s show the emission lines of a…”
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Physical Properties of 5000 Cool Large Magellanic Cloud Supergiants with Gaia XP Spectra: A Detailed Portrait of the Upper H-R Diagram Hints at Missing Supernova Progenitors by Dorn-Wallenstein, Trevor Z., Neugent, Kathryn F., Levesque, Emily M.

“…Abstract Characterizing the physical properties of cool supergiants allows us to probe the final stages of a massive star’s evolution before it undergoes core…”
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The Luminosity Function of Red Supergiants in M31 by Neugent, Kathryn F., Massey, Philip, Georgy, Cyril, Drout, Maria R., Mommert, Michael, Levesque, Emily M., Meynet, Georges, Ekström, Sylvia

“…The mass-loss rates of red supergiant stars (RSGs) are poorly constrained by direct measurements, and yet the subsequent evolution of these stars depends…”
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Binary Yellow Supergiants in the Magellanic Clouds. I. Photometric Candidate Identification by O’Grady, Anna J. G., Drout, Maria R., Neugent, Kathryn F., Ludwig, Bethany, Götberg, Ylva, Gaensler, B. M.

“…Abstract Recent works have constrained the binary fraction of evolved populations of massive stars in local galaxies such as red supergiants and Wolf–Rayet…”
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Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds. II. Spectroscopic and Environmental Analysis of Thorne–Żytkow Object and Super-AGB Star Candidates by O‘Grady, Anna J. G., Drout, Maria R., Gaensler, B. M., Kochanek, C. S., Neugent, Kathryn F., Doherty, Carolyn L., Speagle, Joshua S., Shappee, B. J., Rauch, Michael, Götberg, Ylva, Ludwig, Bethany, Thompson, Todd A.

“…Abstract In previous work, we identified a population of 38 cool and luminous variable stars in the Magellanic Clouds and examined 11 in detail in order to…”
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Yellow Supergiants in the Small Magellanic Cloud: Putting Current Evolutionary Theory to the Test by Neugent, Kathryn F, Massey, Philip, Skiff, Brian, Drout, Maria R, Meynet, Georges, Olsen, Knut A. G

“…The yellow supergiant content of nearby galaxies provides a critical test of massive star evolutionary theory. While these stars are the brightest in a galaxy,…”
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The Red Supergiant Binary Fraction as a Function of Metallicity in M31 and M33 by Neugent, Kathryn F.

“…Recent work measuring the binary fraction of evolved red supergiants (RSGs) in the Magellanic Clouds points to a value between 15% and 30%, with the majority…”
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A MODERN SEARCH FOR WOLF–RAYET STARS IN THE MAGELLANIC CLOUDS. II. A SECOND YEAR OF DISCOVERIES by Massey, Philip, Neugent, Kathryn F, Morrell, Nidia

“…The numbers and types of evolved massive stars found in nearby galaxies provide an exacting test of stellar evolution models. Because of their proximity and…”
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THE CLOSE BINARY FREQUENCY OF WOLF-RAYET STARS AS A FUNCTION OF METALLICITY IN M31 AND M33 by NEUGENT, KATHRYN F, Massey, Philip

“…Massive star evolutionary models generally predict the correct ratio of WC-type and WN-type Wolf-Rayet stars at low metallicities, but underestimate the ratio…”
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A MODERN SEARCH FOR WOLF-RAYET STARS IN THE MAGELLANIC CLOUDS: FIRST RESULTS by Massey, Philip, NEUGENT, KATHRYN F, Morrell, Nidia, Hillier, D John

“…Over the years, directed surveys and incidental spectroscopy have identified 12 Wolf-Rayet (WR) stars in the Small Magellanic Cloud (SMC) and 139 in the Large…”
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A Modern Search for Wolf-Rayet Stars in the Magellanic Clouds. III. A Third Year of Discoveries by Massey, Philip, Neugent, Kathryn F., Morrell, Nidia

“…For the past three years we have been conducting a survey for Wolf-Rayet (WR) stars in the Large and Small Magellanic Clouds (LMC, SMC). Our previous work…”
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The Wolf-Rayet Content of M33 by Neugent, Kathryn F, Massey, Philip

“…Wolf-Rayet (WR) stars are evolved massive stars, and the relative number of WC-type and WN-type WRs should vary with metallicity, providing a sensitive test of…”
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YELLOW AND RED SUPERGIANTS IN THE LARGE MAGELLANIC CLOUD by NEUGENT, KATHRYN F, Massey, Philip, Skiff, Brian, Meynet, Georges

“…Due to their transitionary nature, yellow supergiants (YSGs) provide a critical challenge for evolutionary modeling. Previous studies within M31 and the Small…”
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The Red Supergiant Binary Fraction of the Large Magellanic Cloud by Neugent, Kathryn F., Levesque, Emily M., Massey, Philip, Morrell, Nidia I., Drout, Maria R.

“…The binary fraction of unevolved massive stars is thought to be 70%-100% but there are few observational constraints on the binary fraction of the evolved…”
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The Evolution and Physical Parameters of WN3/O3s: A New Type of Wolf–Rayet Star by Neugent, Kathryn F., Massey, Philip, Hillier, D. John, Morrell, Nidia

“…Abstract As part of a search for Wolf–Rayet (WR) stars in the Magellanic Clouds, we have discovered a new type of WR star in the Large Magellanic Cloud (LMC)…”
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Binary Red Supergiants. II. Discovering and Characterizing B-type Companions by Neugent, Kathryn F., Levesque, Emily M., Massey, Philip, Morrell, Nidia I.

“…The percentage of massive main-sequence OB stars in binary systems is thought to be as high as 100%. However, very few Galactic binary red supergiants (RSGs)…”
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