Search Results - "Lennon, Daniel J."

Boron Abundances in Early B Dwarfs of the Galactic Open Cluster NGC 3293 by Proffitt, Charles R., Jin, Harim, Daflon, Simone, Lennon, Daniel J., Langer, Norbert, Cunha, Katia, Monroe, Talawanda

“…Abstract New boron abundances or upper limits have been determined for eight early B stars in the young Galactic open cluster NGC 3293, using UV spectra…”
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Evidence for Evolved Stellar Binary Mergers in Observed B-type Blue Supergiants by Menon, Athira, Ercolino, Andrea, Urbaneja, Miguel A., Lennon, Daniel J., Herrero, Artemio, Hirai, Ryosuke, Langer, Norbert, Schootemeijer, Abel, Chatzopoulos, Emmanouil, Frank, Juhan, Shiber, Sagiv

“…Abstract Blue supergiants are the brightest stars in their host galaxies, and yet their evolutionary status has been a long-standing problem in stellar…”
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Hubble Tarantula Treasury Project – VI. Identification of Pre–Main-Sequence Stars using Machine Learning techniques by Ksoll, Victor F, Gouliermis, Dimitrios A, Klessen, Ralf S, Grebel, Eva K, Sabbi, Elena, Anderson, Jay, Lennon, Daniel J, Cignoni, Michele, de Marchi, Guido, Smith, Linda J, Tosi, Monica, van der Marel, Roeland P

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WINDS OF LOW-METALLICITY OB-TYPE STARS: HST -COS SPECTROSCOPY IN IC 1613 by Garcia, Miriam, Herrero, Artemio, NAJARRO, FRANCISCO, Lennon, Daniel J, URBANEJA, MIGUEL ALEJANDRO

“…We present the first quantitative ultraviolet spectroscopic analysis of resolved OB stars in IC 1613. Because of its alleged very low metallicity ([lap]1/10 Z…”
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The R136 star cluster dissected with Hubble Space Telescope/STIS – II. Physical properties of the most massive stars in R136 by Bestenlehner, Joachim M, Crowther, Paul A, Caballero-Nieves, Saida M, Schneider, Fabian R N, Simón-Díaz, Sergio, Brands, Sarah A, de Koter, Alex, Gräfener, Götz, Herrero, Artemio, Langer, Norbert, Lennon, Daniel J, Maíz Apellániz, Jesus, Puls, Joachim, Vink, Jorick S

“…ABSTRACT We present an optical analysis of 55 members of R136, the central cluster in the Tarantula Nebula of the Large Magellanic Cloud. Our sample was…”
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STELLAR BORON ABUNDANCES NEAR THE MAIN-SEQUENCE TURNOFF OF THE OPEN CLUSTER NGC 3293 AND IMPLICATIONS FOR THE EFFICIENCY OF ROTATIONALLY DRIVEN MIXING IN STELLAR ENVELOPES by Proffitt, Charles R, Lennon, Daniel J, Langer, Norbert, Brott, Ines

“…Spectra from the Hubble Space Telescope Cosmic Origins Spectrograph and the Space Telescope Imaging Spectrograph covering the B iii resonance line have been…”
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2D kinematics of massive stars near the Galactic Centre by Libralato, Mattia, Lennon, Daniel J, Bellini, Andrea, van der Marel, Roeland, Clark, Simon J, Najarro, Francisco, Patrick, Lee R, Anderson, Jay, Bedin, Luigi R, Crowther, Paul A, de Mink, Selma E, Evans, Christopher J, Platais, Imants, Sabbi, Elena, Sohn, Sangmo Tony

“…ABSTRACT The presence of massive stars (MSs) in the region close to the Galactic Centre (GC) poses several questions about their origin. The harsh environment…”
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Expanded Sample of Small Magellanic Cloud Ultraviolet Dust Extinction Curves: Correlations between the 2175 Å Bump, q PAH, Ultraviolet Extinction Shape, and N(H i)/A(V) by Gordon, Karl D., Fitzpatrick, E. L., Massa, Derck, Bohlin, Ralph, Chastenet, Jérémy, Murray, Claire E., Clayton, Geoffrey C., Lennon, Daniel J., Misselt, Karl A., Sandstrom, Karin

“…Abstract The Small Magellanic Cloud (SMC) shows a large variation in ultraviolet (UV) dust extinction curves, ranging from Milky Way (MW) like to significantly…”
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Expanded Sample of Small Magellanic Cloud Ultraviolet Dust Extinction Curves: Correlations between the 2175 Å Bump, qPAH, Ultraviolet Extinction Shape, and N(H i)/A(V) by Gordon, Karl D, Fitzpatrick, E L, Massa, Derck, Bohlin, Ralph, Chastenet, Jérémy, Murray, Claire E, Clayton, Geoffrey C, Lennon, Daniel J, Misselt, Karl A, Sandstrom, Karin

“…The Small Magellanic Cloud (SMC) shows a large variation in ultraviolet (UV) dust extinction curves, ranging from Milky Way (MW) like to significantly steeper…”
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An X-ray-quiet black hole born with a negligible kick in a massive binary within the Large Magellanic Cloud by Shenar, Tomer, Sana, Hugues, Mahy, Laurent, El-Badry, Kareem, Marchant, Pablo, Langer, Norbert, Hawcroft, Calum, Fabry, Matthias, Sen, Koushik, Almeida, Leonardo A., Abdul-Masih, Michael, Bodensteiner, Julia, Crowther, Paul A., Gieles, Mark, Gromadzki, Mariusz, Hénault-Brunet, Vincent, Herrero, Artemio, Koter, Alex de, Iwanek, Patryk, Kozłowski, Szymon, Lennon, Daniel J., Apellániz, Jesús Maíz, Mróz, Przemysław, Moffat, Anthony F. J., Picco, Annachiara, Pietrukowicz, Paweł, Poleski, Radosław, Rybicki, Krzysztof, Schneider, Fabian R. N., Skowron, Dorota M., Skowron, Jan, Soszyński, Igor, Szymański, Michał K., Toonen, Silvia, Udalski, Andrzej, Ulaczyk, Krzysztof, Vink, Jorick S., Wrona, Marcin

“…Stellar-mass black holes are the final remnants of stars born with more than 15 solar masses. Billions are expected to reside in the Local Group, yet only a…”
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Massive stars in extremely metal-poor galaxies: a window into the past by Garcia, Miriam, Evans, Christopher J., Bestenlehner, Joachim M., Bouret, Jean Claude, Castro, Norberto, Cerviño, Miguel, Fullerton, Alexander W., Gieles, Mark, Herrero, Artemio, de Koter, Alexander, Lennon, Daniel J., van Loon, Jacco Th, Martins, Fabrice, de Mink, Selma E., Najarro, Francisco, Negueruela, Ignacio, Sana, Hugues, Simón-Díaz, Sergio, Szécsi, Dorottya, Tramper, Frank, Vink, Jorick S., Wofford, Aida

“…Cosmic history has witnessed the lives and deaths of multiple generations of massive stars, all of them invigorating their host galaxies with ionizing photons,…”
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The First Spectroscopic Observations of Caustic Crossing in a Binary Microlensing Event by Lennon, Daniel J, Mao, Shude, Fuhrmann, K, Gehren, T

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A Three-Decade Outburst of the LMC Luminous Blue Variable R127 Draws to a Close by Walborn, Nolan R, Stahl, Otmar, Gamen, Roberto C, Szeifert, Thomas, Morrell, Nidia I, Smith, Nathan, Howarth, Ian D, Humphreys, Roberta M, Bond, Howard E, Lennon, Daniel J

“…The paradigmatic luminous blue variable R127 in the Large Magellanic Cloud has been found in the intermediate, peculiar early-B state, and substantially…”
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A CNO Dichotomy among O2 Giant Spectra in the Magellanic Clouds by Walborn, Nolan R, Morrell, Nidia I, Howarth, Ian D, Crowther, Paul A, Lennon, Daniel J, Massey, Philip, Arias, Julia I

“…From a survey of the 3400 Aa region in the earliest O-type spectra, we have found that two of the four O2 giants observed in the Large Magellanic Cloud have O…”
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Ultraviolet Line Spectra of Metal-poor Star-forming Galaxies by Leitherer, Claus, Leão, João R. S, Heckman, Timothy M, Lennon, Daniel J, Pettini, Max, Robert, Carmelle

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The Remarkable Alternating Spectra of the Of?p Star HD 191612 by Walborn, Nolan R, Howarth, Ian D, Herrero, Artemio, Lennon, Daniel J

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A period and a prediction for the Of ? p spectrum alternator HD 191612 by Walborn, Nolan R, Howarth, Ian D, Rauw, Grégor, Lennon, Daniel J, Bond, Howard E, Negueruela, Ignacio, Nazé, Yaël, Corcoran, Michaël F, Herrero, Artemio, Pellerin, Anne

“…The observational picture of the enigmatic O-type spectrum variable HD 191612 has been sharpened substantially. A symmetrical, low-amplitude light curve with a…”
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Boron Abundances in Early B Dwarfs of the Galactic Open Cluster NGC 3293 Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with proposal GO-14673 by Proffitt, Charles R., Jin, Harim, Daflon, Simone, Lennon, Daniel J., Langer, Norbert, Cunha, Katia, Monroe, Talawanda

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Space Telescope Imaging Spectrograph Ultraviolet Spectroscopy of Early B Supergiants in M31 by Bresolin, Fabio, Kudritzki, Rolf-Peter, Lennon, Daniel J, Smartt, Stephen J, Herrero, Artemio, Urbaneja, Miguel A, Puls, Joachim

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Mass-Loss Rates and Stellar Wind Momenta of A-Supergiants in M31: First Results from the Keck HIRES Spectrograph by McCarthy, James K, Kudritzki, Rolf-Peter, Lennon, Daniel J, Venn, Kim A, Puls, Joachim

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