Search Results - "Kounkel, Marina"

Supernovae in Orion: The Missing Link in the Star-forming History of the Region by Kounkel, Marina

“…The Orion Complex is a notable star-forming region fragmented into several different populations with substantial differences in their phase space. I propose a…”
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Runaway Young Stars near the Orion Nebula by McBride, Aidan, Kounkel, Marina

“…The star-forming region of the Orion Nebula (ONC) is ideal to study the stellar dynamics of young stars in a clustered environment. Using Gaia DR2 we search…”
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Two Young Eclipsing Binaries in Orion with Temperatures and Radii Affected by Spots and Third Bodies by Kounkel, Marina, Stassun, Keivan G.

“…Abstract In this work we present a model of two young eclipsing binaries in the Orion complex. Both heavily spotted, they present radii and temperatures that…”
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The Evolution of Stellar X-Ray Activity and Angular Momentum as Seen by eROSITA, TESS, and Gaia by Stassun, Keivan G., Kounkel, Marina

“…Abstract We have assembled a sample of ∼8200 stars with spectral types F5V–M5V, all having directly measured X-ray luminosities from eROSITA and rotation…”
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THE GOULD'S BELT DISTANCES SURVEY (GOBELINS). I. TRIGONOMETRIC PARALLAX DISTANCES AND DEPTH OF THE OPHIUCHUS COMPLEX by Ortiz-León, Gisela N., Loinard, Laurent, Kounkel, Marina A., Dzib, Sergio A., Mioduszewski, Amy J., Rodríguez, Luis F., Torres, Rosa M., González-Lópezlira, Rosa A., Pech, Gerardo, Rivera, Juana L., Hartmann, Lee, Boden, Andrew F., Evans II, Neal J., Briceño, Cesar, Tobin, John J., Galli, Phillip A. B., Gudehus, Donald

“…ABSTRACT We present the first results of the Gould's Belt Distances Survey (GOBELINS), a project aimed at measuring the proper motion and trigonometric…”
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The Gould's Belt Distances Survey (GOBELINS). V. Distances and Kinematics of the Perseus Molecular Cloud by Ortiz-León, Gisela N., Loinard, Laurent, Dzib, Sergio A., Galli, Phillip A. B., Kounkel, Marina, Mioduszewski, Amy J., Rodríguez, Luis F., Torres, Rosa M., Hartmann, Lee, Boden, Andrew F., Evans, Neal J., Briceño, Cesar, Tobin, John J.

“…We derive the distance and structure of the Perseus molecular cloud by combining trigonometric parallaxes from Very Long Baseline Array (VLBA) observations,…”
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THE GOULD'S BELT DISTANCES SURVEY (GOBELINS). III. THE DISTANCE TO THE SERPENS/AQUILA MOLECULAR COMPLEX by Ortiz-León, Gisela N., Dzib, Sergio A., Kounkel, Marina A., Loinard, Laurent, Mioduszewski, Amy J., Rodríguez, Luis F., Torres, Rosa M., Pech, Gerardo, Rivera, Juana L., Hartmann, Lee, Boden, Andrew F., II, Neal J. Evans, Briceño, Cesar, Tobin, John J., Galli, Phillip A. B.

“…ABSTRACT We report on new distances and proper motions to seven stars across the Serpens/Aquila complex. The observations were obtained as part of the Gould's…”
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The Gould's Belt Distances Survey (GOBELINS). IV. Distance, Depth, and Kinematics of the Taurus Star-forming Region by Galli, Phillip A. B., Loinard, Laurent, Ortiz-Léon, Gisela N., Kounkel, Marina, Dzib, Sergio A., Mioduszewski, Amy J., Rodríguez, Luis F., Hartmann, Lee, Teixeira, Ramachrisna, Torres, Rosa M., Rivera, Juana L., Boden, Andrew F., Evans II, Neal J., Briceño, Cesar, Tobin, John J., Heyer, Mark

“…We present new trigonometric parallaxes and proper motions of young stellar objects in the Taurus molecular cloud complex from observations collected with the…”
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A Self-consistent Data-driven Model for Determining Stellar Parameters from Optical and Near-infrared Spectra by Sizemore, Logan, Llanes, Diego, Kounkel, Marina, Hutchinson, Brian, Stassun, Keivan G., Chandra, Vedant

“…Abstract Data-driven models, which apply machine learning to infer physical properties from large quantities of data, have become increasingly important for…”
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RADIO MEASUREMENTS OF THE STELLAR PROPER MOTIONS IN THE CORE OF THE ORION NEBULA CLUSTER by Dzib, Sergio A., Loinard, Laurent, Rodríguez, Luis F., Gómez, Laura, Forbrich, Jan, Menten, Karl M., Kounkel, Marina A., Mioduszewski, Amy J., Hartmann, Lee, Tobin, John J., Rivera, Juana L.

“…ABSTRACT Using multi-epoch Very Large Array observations, covering a time baseline of 29.1 years, we have measured the proper motions of 88 young stars with…”
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Measurement of the Angular Momenta of Pre-main-sequence Stars: Early Evolution of Slow and Fast Rotators and Empirical Constraints on Spin-down Torque Mechanisms by Kounkel, Marina, Stassun, Keivan G., Hillenbrand, Lynne A., Hernández, Jesús, Serna, Javier, Curtis, Jason Lee

“…Abstract We use TESS full-frame imaging data to investigate the angular momentum evolution of young stars in the Orion Complex. We confirm recent findings that…”
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Dynamical Mass of the Ophiuchus Intermediate-mass Stellar System S1 with DYNAMO-VLBA by Ordóñez-Toro, Jazmín, Dzib, Sergio A., Loinard, Laurent, Ortiz-León, Gisela, Kounkel, Marina A., Masqué, Josep M., Medina, S.-N. X., Galli, Phillip A. B., Dupuy, Trent J., Rodríguez, Luis F., Quiroga-Nuñez, Luis H.

“…Abstract We report dynamical mass measurements of the individual stars in the most luminous and massive stellar member of the nearby Ophiuchus star-forming…”
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An HST Survey of Protostellar Outflow Cavities: Does Feedback Clear Envelopes? by Habel, Nolan M., Thomas Megeath, S., Jon Booker, Joseph, Fischer, William J., Kounkel, Marina, Poteet, Charles, Furlan, Elise, Stutz, Amelia, Manoj, P., Tobin, John J., Nagy, Zsofia, Pokhrel, Riwaj, Watson, Dan

“…Abstract We study protostellar envelope and outflow evolution using Hubble Space Telescope NICMOS or WFC3 images of 304 protostars in the Orion molecular…”
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An Eclipsing Binary Comprising Two Active Red Stragglers of Identical Mass and Synchronized Rotation: A Post-mass-transfer System or Just Born That Way? by Stassun, Keivan G., Torres, Guillermo, Kounkel, Marina, Tofflemire, Benjamin M., Leiner, Emily, Feliz, Dax L., Dixon, Don M., Mathieu, Robert D., Gosnell, Natalie, Gully-Santiago, Michael

“…Abstract We report the discovery of 2M0056–08 as an equal-mass eclipsing binary (EB), comprising two red straggler stars (RSSs) with an orbital period of 33.9…”
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Kinematics of the Optically Visible YSOs toward the Orion B Molecular Cloud by Kounkel, Marina, Hartmann, Lee, Mateo, Mario, Bailey, John I.

“…We present results from high-resolution optical spectra toward 66 young stars in the Orion B molecular cloud to study their kinematics and other properties…”
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ABYSS. II. Identification of Young Stars in Optical SDSS Spectra and Their Properties by Saad, Serat, Lane, Kaitlyn, Kounkel, Marina, Stassun, Keivan G., López-Valdivia, Ricardo, Kim, Jinyoung Serena, Peña Ramírez, Karla, Stringfellow, Guy S., Román-Zúñiga, Carlos G., Hernández, Jesús, Wolk, Scott J., Hillenbrand, Lynne A.

“…Abstract We developed a tool that measures equivalent widths of various lines in low-resolution optical spectra, and it was applied to stellar spectra obtained…”
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Chandra Observations of Six Peter Pan Disks: Diversity of X-Ray-driven Internal Photoevaporation Rates Does Not Explain Their Rare Longevity by Laos, Emily, Wisniewski, John P., Kuchner, Marc J., Silverberg, Steven M., Günther, Hans Moritz, Principe, David A., Bonine, Brett, Kounkel, Marina

“…We present Chandra X-ray observations of six previously identified Peter Pan objects, rare ∼40 Myr systems with evidence of primordial disk retention. We…”
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ABYSS. I. Targeting Strategy for the APOGEE and BOSS Young Star Survey in SDSS-V by Kounkel, Marina, Zari, Eleonora, Covey, Kevin, Tkachenko, Andrew, Zúñiga, Carlos Román, Stassun, Keivan, Stutz, Amelia M., Stringfellow, Guy, Roman-Lopes, Alexandre, Hernández, Jesús, Ramírez, Karla Peña, Bayo, Amelia, Kim, Jinyoung Serena, Cao, Lyra, Wolk, Scott J., Kollmeier, Juna, López-Valdivia, Ricardo, Rojas-Ayala, Bárbara

“…Abstract The fifth iteration of the Sloan Digital Sky Survey is set to obtain optical and near-infrared spectra of ∼5 million stars of all ages and masses…”
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THE GOULD'S BELT VERY LARGE ARRAY SURVEY. IV. THE TAURUS-AURIGA COMPLEX by Dzib, Sergio A, Loinard, Laurent, Rodriguez, Luis F, Mioduszewski, Amy J, Ortiz-Leon, Gisela N, Kounkel, Marina A, Pech, Gerardo, Rivera, Juana L, Torres, Rosa M, Boden, Andrew F

“…We present a multi-epoch radio study of the Taurus-Auriga star-forming complex made with the Karl G. Jansky Very Large Array at frequencies of 4.5 GHz and 7.5…”
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Rotational Evolution of Classical T Tauri Stars: Models and Observations by Serna, Javier, Pinzón, Giovanni, Hernández, Jesús, Manzo-Martínez, Ezequiel, Mauco, Karina, Román-Zúñiga, Carlos G., Calvet, Nuria, Briceño, Cesar, López-Valdivia, Ricardo, Kounkel, Marina, Stringfellow, Guy S., Stassun, Keivan G., Pinsonneault, Marc, Adame, Lucia, Cao, Lyra, Covey, Kevin, Bayo, Amelia, Roman-Lopes, Alexandre, Nitschelm, Christian, Lane, Richard R.

“…Abstract We developed a grid of stellar rotation models for low-mass and solar-type classical T Tauri stars (CTTS; 0.3 M ⊙ < M * < 1.2 M ⊙ ). These models…”
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