Tuesday, October 30, 2012

1210.7307 (Patricia Ann Whitelock)

Asymptotic Giant Branch Variables as Extragalactic Distance Indicators    [PDF]

Patricia Ann Whitelock

1210.7342 (Peter Gentile et al.)

Chandra Observations of Black-Widow Pulsars    [PDF]

Peter Gentile, Maura McLaughlin, Mallory Roberts, Fernando Camilo, Jason Hessels, Matthew Kerr, Scott Ransom, Paul Ray, Ingrid Stairs

1210.7343 (V. Silva Aguirre et al.)

Determining distances using asteroseismic methods    [PDF]

V. Silva Aguirre, L. Casagrande, S. Basu, T. L. Campante, W. J. Chaplin, D. Huber, A. Miglio, A. M. Serenelli, KASC WG#1

1210.7374 (Justin R. Crepp et al.)

The TRENDS High-Contrast Imaging Survey. II. Direct Detection of the HD 8375 Tertiary    [PDF]

Justin R. Crepp, John Asher Johnson, Andrew W. Howard, Geoff W. Marcy, Debra A. Fischer, Scott M. Yantek, Jason T. Wright, Howard Isaacson, Ying Feng

1210.7504 (Douglas C. Braun)

Helioseismic Holography of an Artificial Submerged Sound Speed Perturbation and Implications for the Detection of Pre-Emergence Signatures of Active Regions    [PDF]

Douglas C. Braun

1210.7527 (Prajwal R. Kafle et al.)

Kinematics of the stellar halo and the mass distribution of the Milky Way using BHB stars    [PDF]

Prajwal R. Kafle, Sanjib Sharma, Geraint F. Lewis, Joss Bland-Hawthorn

1210.7546 (Kevin Moore et al.)

Circumstellar Shell Formation in Symbiotic Recurrent Novae    [PDF]

Kevin Moore, Lars Bildsten

1210.7573 (Adam P. Showman et al.)

Atmospheric dynamics of brown dwarfs and directly imaged giant planets    [PDF]

Adam P. Showman, Yohai Kaspi

1210.7614 (M. Ziegler et al.)

BD-22 3467, a DAO-type star exciting the nebula Abell 35    [PDF]

M. Ziegler, T. Rauch, K. Werner, J. Koeppen, J. W. Kruk

1210.7636 (T. Rauch)

Panchromatic Calibration of Astronomical Observations with State-of-the-Art White Dwarf Model Atmospheres    [PDF]

T. Rauch

1210.7637 (Akimasa Kataoka et al.)

Exploring Magnetic Field Structure in Star-Forming Cores with Polarization of Thermal Dust Emission    [PDF]

Akimasa Kataoka, Masahiro N. Machida, Kohji Tomisaka

1210.7644 (R. H. Cameron et al.)

Are the strengths of solar cycles determined by converging flows towards the activity belts?    [PDF]

R. H. Cameron, M. Schuessler

1210.7646 (D. E. Ionov et al.)

Gas dynamic simulation of the star-planet interaction using a binary star model    [PDF]

D. E. Ionov, D. V. Bisikalo, P. V. Kaygorodov, V. I. Shematovich

1210.7667 (Davina Innes et al.)

Quiet Sun Explosive Events: Jets, Splashes, and Eruptions    [PDF]

Davina Innes, Luca Teriaca

1210.7679 (L. Matrà et al.)

A new Herschel view of the young star T54: not a transitional disk?    [PDF]

L. Matrà, B. Merín, C. Alves de Oliveira, N. Huélamo, A. Kóspál, N. L. J. Cox, Á. Ribas, E. Puga, R. Vavrek, P. Royer, T. Prusti, G. L. Pilbratt, P. André

1210.7699 (Joseph Roche)

EG Andromedae: A Symbiotic System as an Insight into Red Giant Chromospheres    [PDF]

Joseph Roche

1210.7706 (M. A. McGill et al.)

The Effect of Density on the Thermal Structure of Gravitationally-Darkened Be Star Disks    [PDF]

M. A. McGill, T. A. A. Sigut, C. E. Jones

1210.7770 (Pavel A. Denissenkov)

Tools for Astrophysics: MESA and NuGrid    [PDF]

Pavel A. Denissenkov

1210.7775 (B. Vaidya et al.)

MHD Modeling of a Disk-Wind from a High-Mass Protobinary: the case of Orion Source I    [PDF]

B. Vaidya, C. Goddi

1210.7776 (Pavel A. Denissenkov et al.)

Nova Framework: A New Tool For Modeling of Nova Outbursts and Nucleosynthesis    [PDF]

Pavel A. Denissenkov, Falk Herwig, Marco Pignatari, James W. Truran

Monday, October 29, 2012

1210.6980 (Rubab Khan et al.)

Finding η Car Analogs in Nearby Galaxies Using Spitzer: I. Candidate Selection    [PDF]

Rubab Khan, K. Z. Stanek, C. S. Kochanek

1210.6984 (Bernhard Mueller et al.)

A New Multi-Dimensional General Relativistic Neutrino Hydrodynamics Code of Core-Collapse Supernovae III. Gravitational Wave Signals from Supernova Explosion Models    [PDF]

Bernhard Mueller, Hans-Thomas Janka, Andreas Marek

1210.6985 (Sharon Xuesong Wang et al.)

The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b    [PDF]

Sharon Xuesong Wang, Jason T. Wright, William Cochran, Stephen R. Kane, Gregory W. Henry, Matthew J. Payne, Michael Endl, Phillip J. MacQueen, Jeff A. Valenti, Victoria Antoci, Diana Dragomir, Jaymie M. Matthews, Andrew W. Howard, Geoffrey W. Marcy, Howard Isaacson, Eric B. Ford, Suvrath Mahadevan, Kaspar von Braun

1210.7021 (Ryan M. Shannon et al.)

Pulse intensity modulation and the timing stability of millisecond pulsars: A case study of PSR J1713+0747    [PDF]

Ryan M. Shannon, James M. Cordes

1210.7027 (J. X. Cheng et al.)

Solar flare hard X-ray spikes observed by RHESSI: a statistical study    [PDF]

J. X. Cheng, J. Qiu, M. D. Ding, H. Wang

1210.7040 (J. Qiu et al.)

Solar flare hard X-ray spikes observed by RHESSI: a case study    [PDF]

J. Qiu, J. X. Cheng, G. J. Hurford, Y. Xu, H. Wang

1210.7041 (Leonid L. Kitchatinov)

Theory of differential rotation and meridional circulation    [PDF]

Leonid L. Kitchatinov

1210.7082 (Kuantay Boshkayev et al.)

On Nuclear Matter Cores and Their Applications    [PDF]

Kuantay Boshkayev, Michael Rotondo, Remo Ruffini

1210.7088 (Kuantay Boshkayev et al.)

On the Maximum Mass of General Relativistic Uniformly Rotating White Dwarfs    [PDF]

Kuantay Boshkayev, Jorge Rueda, Remo Ruffini

1210.7096 (Olga Maryeva et al.)

Medium resolution spectroscopy of the supergiant O3If* Cyg OB2 No7    [PDF]

Olga Maryeva, Roman Zhuchkov

1210.7106 (Emma Whelan et al.)

Spatially Resolved Observations of the Bipolar Optical Outflow from the Brown Dwarf 2MASSJ12073347-3932540    [PDF]

Emma Whelan, Tom Ray, Fernando Comeron, Francesca Bacciotti, Patrick Kavanagh

1210.7112 (Wynn C. G. Ho)

Central compact objects and their magnetic fields    [PDF]

Wynn C. G. Ho

1210.7120 (Marek Skarka)

Known Galactic field Blazhko stars    [PDF]

Marek Skarka

1210.7122 (Ralf Kaiser)

The axisymmetric antidynamo theorem revisited    [PDF]

Ralf Kaiser

1210.7129 (B. B. Soares et al.)

On the rotation of ONC stars in the Tsallis formalism context    [PDF]

B. B. Soares, J. R. P. Silva

1210.7145 (V. S. Dhillon et al.)

The SW Sex enigma    [PDF]

V. S. Dhillon, D. A. Smith, T. R. Marsh

1210.7147 (C. Ulusoy et al.)

Mode identification in the high-amplitude δ Scuti star V2367 Cyg    [PDF]

C. Ulusoy, T. Gülmez, I. Stateva, D. Dimitrov, I. Kh. Iliev, H. A. Kobulnicky, B. Yaşarsoy, M. Álvarez, R. Michel, L. Fox Machado, M. Damasso, A. Carbognani, D. Cenadelli, T. E. Pickering, J. Kwon, M. Tamura, L. A. Balona

1210.7150 (Wolfgang Gieren et al.)

Cepheid distances from the Baade-Wesselink method    [PDF]

Wolfgang Gieren, Jesper Storm, Nicolas Nardetto, Alexandre Gallenne, Grzegorz Pietrzyński, Pascal Fouqué, Thomas G. Barnes, Daniel Majaess

1210.7175 (H. Hotta et al.)

Generation of twist on magnetic flux tubes at the base of the solar convection zone    [PDF]

H. Hotta, T. Yokoyama

1210.7178 (B. Nisini et al.)

Mapping water in protostellar outflows with Herschel: PACS and HIFI observations of L1448-C    [PDF]

B. Nisini, G. Santangelo, S. Antoniucci, M. Benedettini, C. Codella, T. Giannini, A. Lorenzani, R. Liseau, M. Tafalla, P. Bjerkeli, S. Cabrit, P. Caselli, L. Kristensen, D. Neufeld, G. Melnick, E. F. van Dishoeck

1210.7197 (Ross E. Falcon et al.)

An Experimental Platform for Creating White Dwarf Photospheres in the Laboratory    [PDF]

Ross E. Falcon, G. A. Rochau, J. E. Bailey, J. L. Ellis, A. L. Carlson, T. A. Gomez, M. H. Montgomery, D. E. Winget, E. Y. Chen, M. R. Gomez, T. J. Nash

1210.7200 (J. E. Colucci et al.)

The Detailed Chemical Abundance Patterns of M31 Globular Clusters    [PDF]

J. E. Colucci, R. A. Bernstein, J. Cohen

1210.7211 (James F. Buell)

What planetary nebulae tell us about helium and the CNO elements in Galactic bulge stars    [PDF]

James F. Buell

Friday, October 26, 2012

1210.6654 (Esther Buenzli et al.)

Vertical Atmospheric Structure in a Variable Brown Dwarf: Pressure-dependent Phase Shifts in Simultaneous HST-Spitzer Light Curves    [PDF]

Esther Buenzli, Daniel Apai, Caroline V. Morley, Davin Flateau, Adam P. Showman, Adam Burrows, Mark S. Marley, Nikole K. Lewis, I. Neill Reid

1210.6658 (Dimitri Veras et al.)

Planetary Orbital Equations in Externally-Perturbed Systems: Position and Velocity-Dependent Forces    [PDF]

Dimitri Veras, N. Wyn Evans

1210.6660 (Geoffroy Lesur et al.)

The magnetorotational instability as a jet launching mechanism    [PDF]

Geoffroy Lesur, Jonathan Ferreira, Gordon Ogilvie

1210.6664 (Sebastien Fromang et al.)

Local outflows from turbulent accretion disks    [PDF]

Sebastien Fromang, Henrik N. Latter, Geoffroy Lesur, Gordon I. Ogilvie

1210.6679 (E. Baron et al.)

A 3D radiative transfer framework: X. Arbitrary Velocity Fields in the Co-moving Frame    [PDF]

E. Baron, Peter H. Hauschildt, Bin Chen, Sebastian Knop

1210.6686 (Sanjay Gosain et al.)

A multi-spacecraft view of a giant filament eruption during 26/27 September 2009    [PDF]

Sanjay Gosain, Brigitte Schmieder, Guy Artzner, Sergei Bogachev, Tibor Torok

1210.6690 (Sanjay Gosain et al.)

Dual Trigger of Transverse Oscillations in a Prominence by EUV Fast and Slow Coronal Waves: SDO/AIA and STEREO/EUVI Observations    [PDF]

Sanjay Gosain, Claire Foullon

1210.6691 (Sanjay Gosain et al.)

Resolving Azimuth Ambiguity Using Vertical Nature of Solar Quiet-Sun Magnetic Fields    [PDF]

Sanjay Gosain, Alexei A. Pevtsov

1210.6765 (M. E. Lohr et al.)

Period and period change measurements for 143 SuperWASP eclipsing binary candidates near the short-period limit and discovery of a doubly eclipsing quadruple system    [PDF]

M. E. Lohr, A. J. Norton, U. C. Kolb, P. F. L. Maxted, I. Todd, R. G. West

1210.6770 (E. Flaccomio et al.)

X-ray variability of PMS stars - Toward an explanation of the different X-ray properties of CTTS and WTTS    [PDF]

E. Flaccomio, G. Micela, S. Sciortino

1210.6779 (G. Stellmacher et al.)

Observation of an Instability in a 'Quiescent' Prominence    [PDF]

G. Stellmacher, E. Wiehr

1210.6783 (Sonja Schuh)

Acoustic and buoyancy modes throughout stellar evolution - Seismic properties of stars at different stellar ages and masses    [PDF]

Sonja Schuh

1210.6796 (R. Simoniello et al.)

The quasi-biennial periodicity as a window on the solar magnetic dynamo configuration    [PDF]

R. Simoniello, K. Jain, S. C. Tripathy, S. Turck-Chieze, C. Baldner, W. Finsterle, F. Hill, M. Roth

1210.6835 (Jonathan D. Henshaw et al.)

Complex, Quiescent Kinematics in a Highly Filamentary Infrared Dark Cloud    [PDF]

Jonathan D. Henshaw, Paola Caselli, Francesco Fontani, Izaskun Jimenez-Serra, Jonathan C. Tan, Audra K. Hernandez

1210.6841 (Ken'ichiro Nakazato et al.)

Supernova Neutrino Light Curves and Spectra for Various Progenitor Stars: From Core Collapse to Proto-neutron Star Cooling    [PDF]

Ken'ichiro Nakazato, Kohsuke Sumiyoshi, Hideyuki Suzuki, Tomonori Totani, Hideyuki Umeda, Shoichi Yamada

1210.6843 (T. V. Mishenina et al.)

Activity and the Li abundances in the FGK dwarfs    [PDF]

T. V. Mishenina, C. Soubiran, V. V. Kovtyukh, M. M. Katsova, M. A. Livshits

1210.6865 (D. Douchin et al.)

Planetary nebulae : getting closer to an unbiased binary fraction    [PDF]

D. Douchin, O. De Marco, G. H. Jacoby, T. C. Hillwig, D. J. Frew, I. Bojicic, G. Jasniewicz, Q. A. Parker

Thursday, October 25, 2012

1111.6058 (Irina Sagert et al.)

Soft nuclear equation-of-state from heavy-ion data and implications for compact stars    [PDF]

Irina Sagert, Laura Tolos, Debarati Chatterjee, Juergen Schaffner-Bielich, Christian Sturm

1210.6353 (Zachary G. Jennings et al.)

Supernova Remnant Progenitor Masses in M31    [PDF]

Zachary G. Jennings, Benjamin F. Williams, Jeremiah W. Murphy, Julianne J. Dalcanton, Karoline M. Gilbert, Andrew E. Dolphin, Morgan Fouesneau, Daniel R. Weisz

1210.6360 (Kevin Gullikson et al.)

Detection of Low Mass-ratio Stellar Binary Systems    [PDF]

Kevin Gullikson, Sarah Dodson-Robinson

1210.6387 (Ian U. Roederer et al.)

New Hubble Space Telescope Observations of Heavy Elements in Four Metal-Poor Stars    [PDF]

Ian U. Roederer, James E. Lawler, Jennifer S. Sobeck, Timothy C. Beers, John J. Cowan, Anna Frebel, Inese I. Ivans, Hendrik Schatz, Christopher Sneden, Ian B. Thompson

1210.6404 (Howard E. Bond et al.)

NSV 11749: Symbiotic Nova, Not a Born-Again Red Giant    [PDF]

Howard E. Bond, Mansi M. Kasliwal

1210.6434 (S. Krishna Prasad et al.)

Variation of Emission Line Width in Mid- and High-Latitude Corona    [PDF]

S. Krishna Prasad, Jagdev Singh, D. Banerjee

1210.6443 (G. Bodo et al.)

Magnetorotational turbulence in stratified shearing boxes with perfect gas equation of state and finite thermal diffusivity    [PDF]

G. Bodo, F. Cattaneo, A. Mignone, P. Rossi

1210.6452 (F. Zhang et al.)

Yunnan-III models for Evolutionary population synthesis    [PDF]

F. Zhang, L. Li, Z. Han, Y. Zhuang, X. Kang

1210.6476 (I. Dorotovic et al.)

On standing sausage waves in photospheric magnetic waveguides    [PDF]

I. Dorotovic, R. Erdelyi, N. Freij, V. Karlovsky, I. Marquez

1210.6480 (Caroline D'Angelo)

Quasi-Periodic Oscillations in magnetars: linking variability and emission    [PDF]

Caroline D'Angelo

1210.6495 (A. Jendreieck et al.)

Red Giant Oscillations: Stellar Models and Mode Frequency Calculations    [PDF]

A. Jendreieck, A. Weiss, V. Silva Aguirre, J. Christensen-Dalsgaard, R. Handberg, G. Ruchti, C. Jiang, A. Thygesen

1210.6499 (V. A. Sheminova)

Two-dimensional MHD models of solar magnetogranulation. Testing of the models and methods of Stokes diagnostics    [PDF]

V. A. Sheminova

1210.6529 (D. A. Scott et al.)

First Direct Measurement of the ^{17}O(p,γ)^{18}F Reaction Cross-Section at Gamow Energies for Classical Novae    [PDF]

D. A. Scott, A. Caciolli, A. DiLeva, A. Formicola, M. Aliotta, M. Anders, D. Bemmerer, C. Broggini, M. Campeggio, P. Corvisiero, Z. Elekes, Zs. Fülöp, G. Gervino, A. Guglielmetti, C. Gustavino, Gy. Gyürky, G. Imbriani, M. Junker, M. Laubenstein, R. Menegazzo, M. Marta, E. Napolitani, P. Prati, V. Rigato, V. Roca, E. Somorjai, C. Salvo, O. Straniero, F. Strieder, T. Szücs, F. Terrasi, D. Trezzi

1210.6532 (Carles Badenes et al.)

SDSS 1355+0856: A detached white dwarf + M star binary in the period gap discovered by the SWARMS survey    [PDF]

Carles Badenes, Marten H. van Kerkwijk, Mukremin Kilic, Steven J. Bickerton, Tsevi Mazeh, Fergal Mullally, Lev Tal-Or, Susan E. Thompson

1210.6620 (Thayne Currie et al.)

Direct Imaging Confirmation and Characterization of a Dust-Enshrouded Candidate Exoplanet Orbiting Fomalhaut    [PDF]

Thayne Currie, John Debes, Timothy J. Rodigas, Adam Burrows, Yoichi Itoh, Misato Fukagawa, Scott Kenyon, Marc Kuchner, Soko Matsumura

1210.6637 (Erico L. Rempel et al.)

Coherent structures and the saturation of a nonlinear dynamo    [PDF]

Erico L. Rempel, Abraham C. -L. Chian, Axel Brandenburg, Pablo R. Muñoz

Wednesday, October 24, 2012

1210.6029 (Laura Chomiuk et al.)

The Radio Light Curve of the Gamma-Ray Nova in V407 Cyg: Thermal Emission from the Ionized Symbiotic Envelope, Devoured from Within by the Nova Blast    [PDF]

Laura Chomiuk, Miriam I. Krauss, Michael P. Rupen, Thomas Nelson, Nirupam Roy, Jennifer L. Sokoloski, Koji Mukai, Ulisse Munari, Amy Mioduszewski, Jennifer Weston, Tim J. O'Brien, Stewart P. S. Eyres, Michael F. Bode

1210.6030 (R. Smolec et al.)

Pulsation models for the 0.26M_sun star mimicking RR Lyrae pulsator. Model survey for the new class of variable stars    [PDF]

R. Smolec, G. Pietrzynski, D. Graczyk, B. Pilecki, W. Gieren, I. Thompson, K. Stepien, P. Karczmarek, P. Konorski, M. Gorski, K. Suchomska, G. Bono, P. G. Prada Moroni, N. Nardetto

1210.6037 (Desika Narayanan et al.)

The Cosmic Evolution of the IMF Under the Jeans Conjecture with Implications for Bottom-Heavy Ellipticals    [PDF]

Desika Narayanan, Romeel Davé

1210.6042 (Hilding R. Neilson et al.)

Classical Cepheids Require Enhanced Mass Loss    [PDF]

Hilding R. Neilson, Norbert Langer, Scott G. Engle, Ed Guinan, Robert Izzard

1210.6045 (A. Gould et al.)

MOA-2010-BLG-523: "Failed Planet" = RS CVn Star    [PDF]

A. Gould, J. C. Yee, I. A. Bond, A. Udalski, C. Han, U. G. Jorgensen, J. Greenhill, Y. Tsapras, M. H. Pinsonneault, T. Bensby, the uFUN, MOA, OGLE, MiNDSTEp, RoboNet, PLANET collaborations

1210.6050 (Todd A. Thompson et al.)

A Quadruple or Triple Origin For Tycho B and SN 1572    [PDF]

Todd A. Thompson, Andrew Gould

1210.6086 (S. Starrfield et al.)

Theoretical Studies of Accretion of Matter onto White Dwarfs and the Single Degenerate Scenario for Supernovae of Type Ia    [PDF]

S. Starrfield, C. Iliadis, F. X. Timmes, W. R. Hix, W. D. Arnett, C. Meakin, W. M. Sparks

1210.6163 (Luc Dessart et al.)

Radiative Properties of Pair-instability Supernova Explosions    [PDF]

Luc Dessart, Roni Waldman, Eli Livne, D. John Hillier, Stéphane Blondin

1210.6177 (Gregory A. Feiden et al.)

Self-Consistent Magnetic Stellar Evolution Models of the Detached, Solar-Type Eclipsing Binary EF Aquarii    [PDF]

Gregory A. Feiden, Brian Chaboyer

1210.6180 (Jian Li et al.)

Unveiling the super-orbital modulation of LSI +61 303 in X-rays    [PDF]

Jian Li, Diego F. Torres, Shu Zhang, Daniela Hadasch, Nanda Rea, G. Andrea Caliandro, Yupeng Chen, Jianmin Wang

1210.6182 (R. Simoniello et al.)

Seismic comparison of the 11 and 2 yr cycle signatures in the Sun    [PDF]

R. Simoniello, K. Jain, S. C. Tripathy, S. Turck-Chieze, W. Finsterle, M. Roth

1210.6211 (S. M. Andrievsky et al.)

Barium Abundances in Cepheids    [PDF]

S. M. Andrievsky, J. R. D. Lepine, S. A. Korotin, R. E. Luck, V. V. Kovtyukh, W. J. Maciel

1210.6226 (D. Douchin et al.)

Testing the binary hypothesis for the formation and shaping of planetary nebulae    [PDF]

D. Douchin, O. De Marco, G. H. Jacoby, T. C. Hillwig, D. J. Frew, I. Bojicic, G. Jasniewicz, Q. A. Parker

1210.6240 (Saeqa Dil Vrtilek et al.)

Model independent means of catagorizing X-ray binaries. I: Colour-Colour-Intensity Diagrams    [PDF]

Saeqa Dil Vrtilek, Bram Seth Boroson

1210.6258 (B. C. Johnson et al.)

A Self-Consistent Model of the Circumstellar Debris Created by a Giant Hypervelocity Impact in the HD172555 System    [PDF]

B. C. Johnson, C. M. Lisse, C. H. Chen, H. J. Melosh, M. C. Wyatt, P. Thebault, W. G. Henning, E. Gaidos, L. T. Elkins-Tanton, J. C. Bridges, A. Morlok

1210.6268 (C. M. Koepferl et al.)

Disc Clearing of Young Stellar Objects: Evidence for Fast Inside-out Dispersal    [PDF]

C. M. Koepferl, B. Ercolano, J. Dale, P. S. Teixeira, T. Ratzka, L. Spezzi

1210.6300 (Thomas Gomez et al.)

The [Fe/H] Dependence on the Ca {\sc ii}-$M_V$ Relationship    [PDF]

Thomas Gomez, George Wallerstein, Elena Pancino

1210.6322 (S. Hekker et al.)

Seismology of active stars    [PDF]

S. Hekker, R. A. Garcia

1210.6332 (L. M. van Haaften et al.)

Formation of the planet orbiting the millisecond pulsar J1719-1438    [PDF]

L. M. van Haaften, G. Nelemans, R. Voss, P. G. Jonker

1210.6333 (L. M. van Haaften et al.)

Late-time evolution of ultracompact X-ray binaries    [PDF]

L. M. van Haaften, G. Nelemans, R. Voss