Publications by Ralph Schoenrich


TESTING THE ASTEROSEISMIC MASS SCALE USING METAL-POOR STARS CHARACTERIZED WITH APOGEE AND KEPLER

ASTROPHYSICAL JOURNAL LETTERS 785 (2014) ARTN L28

CR Epstein, YP Elsworth, JA Johnson, M Shetrone, B Mosser, S Hekker, J Tayar, P Harding, M Pinsonneault, VS Aguirre, S Basu, TC Beers, D Bizyaev, TR Bedding, WJ Chaplin, PM Frinchaboy, RA Garcia, AEG Perez, FR Hearty, D Huber, II Ivans, SR Majewski, S Mathur, D Nidever, A Serenelli, RP Schiavon, DP Schneider, R Schoenrichi, JS Sobeck, KG Stassun, D Stello, G Zasowski


DOES SEGUE/SDSS INDICATE A DUAL GALACTIC HALO?

ASTROPHYSICAL JOURNAL 786 (2014) ARTN 7

R Schoenrich, M Asplund, L Casagrande


Fundamental stellar parameters and metallicities from Bayesian spectroscopy: application to low- and high-resolution spectra

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 443 (2014) 698-717

R Schoenrich, M Bergemann


STROMGREN SURVEY FOR ASTEROSEISMOLOGY AND GALACTIC ARCHAEOLOGY: LET THE SAGA BEGIN

ASTROPHYSICAL JOURNAL 787 (2014) ARTN 110

L Casagrande, VS Aguirre, D Stello, D Huber, AM Serenelli, S Cassisi, A Dotter, AP Milone, S Hodgkin, AF Marino, MN Lund, A Pietrinferni, M Asplund, S Feltzing, C Flynn, F Grundahl, PE Nissen, R Schoenrich, KJ Schlesinger, W Wang


THE VERTICAL METALLICITY GRADIENT OF THE MILKY WAY DISK: TRANSITIONS IN [alpha/Fe] POPULATIONS

ASTROPHYSICAL JOURNAL 791 (2014) ARTN 112

KJ Schlesinger, JA Johnson, CM Rockosi, YS Lee, TC Beers, P Harding, CA Prieto, JC Bird, R Schoenrich, B Yanny, DP Schneider, BA Weaver, J Brinkmann


A new calibration for the Blue Horizontal Branch

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 430 (2013) 1294-1301

F Fermani, R Schoenrich


Rotational signature of the Milky Way stellar halo

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 432 (2013) 2402-2419

F Fermani, R Schoenrich


The detection and treatment of distance errors in kinematic analyses of stars

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 420 (2012) 1281-1293

R Schoenrich, J Binney, M Asplund


THE METALLICITY DISTRIBUTION FUNCTIONS OF SEGUE G AND K DWARFS: CONSTRAINTS FOR DISK CHEMICAL EVOLUTION AND FORMATION

ASTROPHYSICAL JOURNAL 761 (2012) ARTN 160

KJ Schlesinger, JA Johnson, CM Rockosi, YS Lee, HL Morrison, R Schoenrich, C Allende Prieto, TC Beers, B Yanny, P Harding, DP Schneider, C Chiappini, LN da Costa, MAG Maia, I Minchev, H Rocha-Pinto, BX Santiago


THE APACHE POINT OBSERVATORY GALACTIC EVOLUTION EXPERIMENT: FIRST DETECTION OF HIGH-VELOCITY MILKY WAY BAR STARS

ASTROPHYSICAL JOURNAL LETTERS 755 (2012) ARTN L25

DL Nidever, G Zasowski, SR Majewski, J Bird, AC Robin, I Martinez-Valpuesta, RL Beaton, R Schoenrich, M Schultheis, JC Wilson, MF Skrutskie, RW O'Connell, M Shetrone, RP Schiavon, JA Johnson, B Weiner, O Gerhard, DP Schneider, CA Prieto, K Sellgren, D Bizyaev, H Brewington, J Brinkmann, DJ Eisenstein, PM Frinchaboy, AEG Perez, J Holtzman, FR Hearty, E Malanushenko, V Malanushenko, D Muna, D Oravetz, K Pan, A Simmons, S Snedden, BA Weaver


METALLICITY GRADIENTS IN THE MILKY WAY DISK AS OBSERVED BY THE SEGUE SURVEY

ASTROPHYSICAL JOURNAL 746 (2012) ARTN 149

JY Cheng, CM Rockosi, HL Morrison, RA Schoenrich, YS Lee, TC Beers, D Bizyaev, K Pan, DP Schneider


What velocities and eccentricities tell us about radial migration

ASSEMBLING THE PUZZLE OF THE MILKY WAY 19 (2012) ARTN 05003

R Schoenrich


Solar neighbourhood and Galactic disc(s): New constraints

ASSEMBLING THE PUZZLE OF THE MILKY WAY 19 (2012) ARTN 05004

L Casagrande, R Schoenrich


Radial migration in galactic thick discs

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 422 (2012) 1363-1383

M Solway, JA Sellwood, R Schoenrich


Radial flows and angular momentum conservation in Galactic chemical evolution

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 426 (2012) 2266-2282

T Bilitewski, R Schoenrich


Galactic rotation and solar motion from stellar kinematics

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 427 (2012) 274-287

R Schoenrich


Radial flows and angular momentum conservation in Galactic chemical evolution

Monthly Notices of the Royal Astronomical Society 426 (2012) 2266-2282

T Bilitewski, R Schönrich

We study the effects of radial flows on Galactic chemical evolution. A simple analytic scheme is developed prescribing the coupling of infall from the intergalactic medium and radial flows within the disc based on angular momentum conservation. We show that model parameters are tightly constrained by the observed [Fe/H]-abundance gradient in the Galactic disc. By this comparison the average rotational velocity of the onfalling material can be constrained to 0.7 < u/Vc < 0.75, or respectively ∼160 km s-1 when assuming a constant disc circular velocity of Vc = 220 km s-1. We test the robustness of this value against the influence of other processes. For a very simple model of inside-out formation this value changes only by δu/Vc ∼ 0.1, i.e. ∼20 km s-1, and significantly less on more realistic scenarios, showing that inside-out formation does not alone explain the abundance gradient. Effects of other uncertain parameters, e.g. star formation history and star formation efficiency, have very small impact. Other drivers of inflow beyond our explicit modelling are assessed by adding a fixed inflow across the whole disc. The churning amplitude onlymildly affects the results mostly by slightly flattening the metallicity gradient in the inner disc. A new process causing radial gas flows due to the ejection of material by stars moving on non-circular orbits is studied and seems to contribute negligibly to the total flows. We further show that gaseous outer discs cannot be the main source feeding the persistent star formation in the inner regions by a direct inflow. © 2012 The Authors Monthly Notices of the Royal Astronomical Society.


Abundance Trends in the Milky Way Disk as Observed by SEGUE

GALACTIC ARCHAEOLOGY: NEAR-FIELD COSMOLOGY AND THE FORMATION OF THE MILKY WAY 458 (2012) 105-+

JY Cheng, CM Rockosi, HL Morrison, RA Schoenrich, YS Lee, TC Beers


A new formula for disc kinematics

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 419 (2012) 1546-1556

R Schoenrich, J Binney


CONSTRUCTING A ONE-SOLAR-MASS EVOLUTIONARY SEQUENCE USING ASTEROSEISMIC DATA FROM KEPLER

ASTROPHYSICAL JOURNAL LETTERS 740 (2011) ARTN L2

VS Aguirre, WJ Chaplin, J Ballot, S Basu, TR Bedding, AM Serenelli, GA Verner, A Miglio, MJPFG Monteiro, A Weiss, T Appourchaux, A Bonanno, AM Broomhall, H Bruntt, TL Campante, L Casagrande, E Corsaro, Y Elsworth, RA Garcia, P Gaulme, R Handberg, S Hekker, D Huber, C Karoff, S Mathur, B Mosser, D Salabert, R Schoenrich, SG Sousa, D Stello, TR White, J Christensen-Dalsgaard, RL Gilliland, SD Kawaler, H Kjeldsen, G Houdek, TS Metcalfe, J Molenda-Zakowicz, MJ Thompson, DA Caldwell, JL Christiansen, B Wohler

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