Search Results - "Bird, Jonathan C."

INSIDE OUT AND UPSIDE DOWN: TRACING THE ASSEMBLY OF A SIMULATED DISK GALAXY USING MONO-AGE STELLAR POPULATIONS by Bird, Jonathan C, Kazantzidis, Stelios, Weinberg, David H, Guedes, Javiera, Callegari, Simone, Mayer, Lucio, Madau, Piero

“…We analyze the present day structure and assembly history of a high-resolution hydrodynamic simulation of the formation of a Milky-Way-(MW)-like disk galaxy,…”
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CHEMICAL CARTOGRAPHY WITH APOGEE: METALLICITY DISTRIBUTION FUNCTIONS AND THE CHEMICAL STRUCTURE OF THE MILKY WAY DISK by Hayden, Michael R., Bovy, Jo, Holtzman, Jon A., Nidever, David L., Bird, Jonathan C., Weinberg, David H., Andrews, Brett H., Majewski, Steven R., Prieto, Carlos Allende, Anders, Friedrich, Beers, Timothy C., Bizyaev, Dmitry, Chiappini, Cristina, Cunha, Katia, Frinchaboy, Peter, García-Her andez, D. A., García Pérez, Ana E., Girardi, Léo, Harding, Paul, Hearty, Fred R., Johnson, Jennifer A., Mészáros, Szabolcs, Minchev, Ivan, O'Connell, Robert, Pan, Kaike, Robin, Annie C., Schiavon, Ricardo P., Schneider, Donald P., Schultheis, Mathias, Shetrone, Matthew, Skrutskie, Michael, Steinmetz, Matthias, Smith, Verne, Wilson, John C., Zamora, Olga, Zasowski, Gail

“…ABSTRACT Using a sample of 69,919 red giants from the SDSS-III/APOGEE Data Release 12, we measure the distribution of stars in the [ /Fe] versus [Fe/H] plane…”
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The Extremely Metal-rich Knot of Stars at the Heart of the Galaxy by Rix, Hans-Walter, Chandra, Vedant, Zasowski, Gail, Pillepich, Annalisa, Khoperskov, Sergey, Feltzing, Sofia, Wyse, Rosemary F. G., Frankel, Neige, Horta, Danny, Kollmeier, Juna, Stassun, Keivan, Ness, Melissa K., Bird, Jonathan C., Nidever, David, Fernández-Trincado, José G., Amarante, João A. S., Laporte, Chervin F. P., Lian, Jianhui

“…Abstract We show with Gaia XP spectroscopy that extremely metal-rich (EMR) stars in the Milky Way ([M/H] XP ≳ 0.5) are largely confined to a tight “knot” at…”
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Inside out and upside-down: The roles of gas cooling and dynamical heating in shaping the stellar age–velocity relation by Bird, Jonathan C, Loebman, Sarah R, Weinberg, David H, Brooks, Alyson M, Quinn, Thomas R, Christensen, Charlotte R

“…ABSTRACT Kinematic studies of disc galaxies, using individual stars in the Milky Way or statistical studies of global disc kinematics over time, provide…”
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Radial mixing in galactic discs: the effects of disc structure and satellite bombardment by Bird, Jonathan C., Kazantzidis, Stelios, Weinberg, David H.

“…We use a suite of numerical simulations to investigate the mechanisms and effects of radial migration of stars in disc galaxies such as the Milky Way (MW). An…”
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Empirical constraints on the nucleosynthesis of nitrogen by Johnson, James W, Weinberg, David H, Vincenzo, Fiorenzo, Bird, Jonathan C, Griffith, Emily J

“…ABSTRACT We derive empirical constraints on the nucleosynthetic yields of nitrogen by incorporating N enrichment into our previously developed and empirically…”
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Stellar migration and chemical enrichment in the milky way disc: a hybrid model by Johnson, James W, Weinberg, David H, Vincenzo, Fiorenzo, Bird, Jonathan C, Loebman, Sarah R, Brooks, Alyson M, Quinn, Thomas R, Christensen, Charlotte R, Griffith, Emily J

“…ABSTRACT We develop a hybrid model of galactic chemical evolution that combines a multiring computation of chemical enrichment with a prescription for stellar…”
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Chemical Cartography with APOGEE: Multi-element Abundance Ratios by Weinberg, David H., Holtzman, Jon A., Hasselquist, Sten, Bird, Jonathan C., Johnson, Jennifer A., Shetrone, Matthew, Sobeck, Jennifer, Allende Prieto, Carlos, Bizyaev, Dmitry, Carrera, Ricardo, Cohen, Roger E., Cunha, Katia, Ebelke, Garrett, Fernandez-Trincado, J. G., García-Hernández, D. A., Hayes, Christian R., Jönsson, Henrik, Lane, Richard R., Majewski, Steven R., Malanushenko, Viktor, Mészáros, Szabolcs, Nidever, David L., Nitschelm, Christian, Pan, Kaike, Rix, Hans-Walter, Rybizki, Jan, Schiavon, Ricardo P., Schneider, Donald P., Wilson, John C., Zamora, Olga

“…We map the trends of elemental abundance ratios across the Galactic disk, spanning R = 3 - 15 kpc and midplane distance Z = 0 - 2 kpc , for 15 elements in a…”
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The Milky Way tomography with APOGEE: intrinsic density distribution and structure of mono-abundance populations by Lian, Jianhui, Zasowski, Gail, Mackereth, Ted, Imig, Julie, Holtzman, Jon A, Beaton, Rachael L, Bird, Jonathan C, Cunha, Katia, Fernández-Trincado, José G, Horta, Danny, Lane, Richard R, Masters, Karen L, Nitschelm, Christian, Roman-Lopes, A

“…ABSTRACT The spatial distribution of mono-abundance populations (MAPs, selected in [Fe/H] and [Mg/Fe]) reflect the chemical and structural evolution in a…”
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TRACING CHEMICAL EVOLUTION OVER THE EXTENT OF THE MILKY WAY'S DISK WITH APOGEE RED CLUMP STARS by Nidever, David L, Bovy, Jo, Bird, Jonathan C, Andrews, Brett H, Hayden, Michael, Holtzman, Jon, Majewski, Steven R, Smith, Verne, Robin, Annie C, Perez, Ana E Garcia

“…We employ the first two years of data from the near-infrared, high-resolution SDSS-III/APOGEE spectroscopic survey to investigate the distribution of…”
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THE POWER SPECTRUM OF THE MILKY WAY: VELOCITY FLUCTUATIONS IN THE GALACTIC DISK by Bovy, Jo, Bird, Jonathan C., Pérez, Ana E. García, Majewski, Steven R., Nidever, David L., Zasowski, Gail

“…We investigate the kinematics of stars in the mid-plane of the Milky Way (MW) on scales between 25 pc and 10 kpc with data from the Apache Point Observatory…”
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Chemical Cartography with APOGEE: Mapping Disk Populations with a 2-process Model and Residual Abundances by Weinberg, David H., Holtzman, Jon A., Johnson, Jennifer A., Hayes, Christian, Hasselquist, Sten, Shetrone, Matthew, Ting, Yuan-Sen, Beaton, Rachael L., Beers, Timothy C., Bird, Jonathan C., Bizyaev, Dmitry, Blanton, Michael R., Cunha, Katia, Fernández-Trincado, José G., Frinchaboy, Peter M., García-Hernández, D. A., Griffith, Emily, Johnson, James W., Jönsson, Henrik, Lane, Richard R., Leung, Henry W., Mackereth, J. Ted, Majewski, Steven R., Mészáros, Szabolcs, Nitschelm, Christian, Pan, Kaike, Schiavon, Ricardo P., Schneider, Donald P., Schultheis, Mathias, Smith, Verne, Sobeck, Jennifer S., Stassun, Keivan G., Stringfellow, Guy S., Vincenzo, Fiorenzo, Wilson, John C., Zasowski, Gail

“…Abstract We apply a novel statistical analysis to measurements of 16 elemental abundances in 34,410 Milky Way disk stars from the final data release (DR17) of…”
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THE VERTICAL METALLICITY GRADIENT OF THE MILKY WAY DISK: TRANSITIONS IN [α/Fe] POPULATIONS by Schlesinger, Katharine J, Johnson, Jennifer A, Rockosi, Constance M, Lee, Young Sun, Beers, Timothy C, Harding, Paul, Prieto, Carlos Allende, Bird, Jonathan C, SCHONRICH, RALPH, YANNY, BRIAN, Schneider, Donald P, Weaver, Benjamin A, Brinkmann, Jon

“…Using G dwarfs from the Sloan Extension for Galactic Understanding and Exploration (SEGUE) survey, we have determined the vertical metallicity gradient in the…”
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IN-SYNC. VII. Evidence for a Decreasing Spectroscopic Binary Fraction (from 1 to 100 Myr) within the IN-SYNC Sample by Jaehnig, Karl, Bird, Jonathan C., Stassun, Keivan G., Rio, Nicola Da, Tan, Jonathan C., Cotaar, Michiel, Somers, Garrett

“…We study the occurrence of spectroscopic binaries in young star-forming regions using the INfrared Spectroscopy of Young Nebulous Clusters (IN-SYNC) survey,…”
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Using Ultra Long Period Cepheids to Extend the Cosmic Distance Ladder to 100 Mpc and Beyond by Bird, Jonathan C, Stanek, K. Z, Prieto, José L

“…We examine the properties of 18 long period (80-210 days) and very luminous (median absolute magnitude of MI = -7.86 and MV = -6.97) Cepheids to see if they…”
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A Bound on the Light Emitted during the Thermally Pulsing Asymptotic Giant Branch Phase by Bird, Jonathan C, Pinsonneault, Marc H

“…The integrated luminosity of the thermally pulsing asymptotic giant branch (TP-AGB) phase is a major uncertainty in stellar population synthesis models. We…”
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Stellar migration and chemical enrichment in the milky way disc: a hybrid model by Johnson, James W., Weinberg, David H., Vincenzo, Fiorenzo, Bird, Jonathan C., Loebman, Sarah R., Brooks, Alyson M., Quinn, Thomas R., Christensen, Charlotte R., Griffith, Emily J.

“…We develop a hybrid model of galactic chemical evolution that combines a multiring computation of chemical enrichment with a prescription for stellar migration…”
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The Milky Way tomography with APOGEE: intrinsic density distribution and structure of mono-abundance populations by Lian, Jianhui, Zasowski, Gail, Mackereth, Ted, Imig, Julie, Holtzman, Jon A., Beaton, Rachael L., Bird, Jonathan C., Cunha, Katia, Fernández-Trincado, José G., Horta, Danny, Lane, Richard R., Masters, Karen L., Nitschelm, Christian, Roman-Lopes, A.

“…The spatial distribution of mono-abundance populations (MAPs, selected in [Fe/H] and [Mg/Fe]) reflect the chemical and structural evolution in a galaxy and…”
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Radial mixing in galactic discs: the effects of disc structure and satellite bombardment: Radial mixing in galactic discs by Bird, Jonathan C., Kazantzidis, Stelios, Weinberg, David H.

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The Formation and Evolution of Disk Galaxies by Bird, Jonathan C

“…Current and next generation surveys of the Milky Way promise to revolutionize our observational perspective of the Galaxy. My dissertation uses a suite of…”
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