Most of the older preprints / reprints can be downloaded as compressed Postscript files (*.ps.gz)
Recent publications are formatted as *.pdf

Bergemann M., Gehren T., 2010
Fe-peak element abundances in disk and halo stars
IAU Symp.Vol. 265, p. 348

Mashonkina L., Gehren T., Shi J.R., Korn A., Grupp F. 2010
Fe I/Fe II ionization equilibrium in cool stars: NLTE versus LTE
IAU Symp.Vol. 265, p. 197

Bergemann M., Pickering J.C., Gehren T. 2009
NLTE analysis of CoI/CoII lines in spectra of cool stars with new laboratory hyperfine splitting constants
MNRAS 401, 1334

Shi J. R., Gehren T., Mashonkina L., Zhao G. 2009
Statistical equilibrium of silicon in the atmospheres of metal-poor stars
Astron. Astrophys. 503, 533

Bergemann M., Gehren T. 2008
NLTE abundances of Mn in a sample of metal-poor stars
Astron. Astrophys. 492, 823

Zhang H. W., Gehren T., Zhao G. 2008
Solar scandium abundance
IAU Symp.Vol. 252, p. 127

Shi J. R., Gehren T., Butler K., Mashonkina L. I., Zhao G. 2008
Statistical equilibrium of silicon in the solar atmosphere
Astron. Astrophys. 486, 303

Zhang H. W., Gehren T., Zhao G. 2008
A non-local thermodynamic equilibrum study of scandium in the Sun
Astron. Astrophys. 481, 489

Mashonkina L., Zhao G., Gehren T., Aoki W., Bergemann M., Noguchi K., Shi J. R., Takada-Hidai M., Zhang H. W. 2008
Non-LTE line formation for heavy elements in four very metal-poor stars
Astron. Astrophys. 478, 529

Bergemann M., Gehren T. 2007
Formation of Mn I lines in the solar atmosphere
Astron. Astrophys. 473, 291

Shi J. R., Gehren T., Zhang H. W., Zeng J. L., Zhao G. 2007
Lithium abundances in metal-poor stars
Astron. Astrophys. 465, 587

Kelz A., Bauer S.M., Grupp F., Hill G.J., Popow E., Palunas P., Roth M.M., MacQueen P.J., Tripphahn U. 2006
Prototype development of the integral-field unit for VIRUS
SPIE, 6273, 121

Goessl C.A., Drory N., Relke H., Gebhardt K., Grupp F., Hill G.J., Hopp U., Köhler R., MacQueen P. 2006
The VIRUS data reduction pipeline
SPIE, 6270, 66

Zhang H.W., Gehren T., Butler K., Shi J.R., Zhao G. 2006
Potassium abundances in nearby metal-poor stars
Astron. Astrophys. 457, 647

Zhang H.W., Butler K., Gehren T., Shi J.R., Zhao G. 2006
NLTE analysis of the solar potassium abundance (Research Note)
Astron. Astrophys, 453, 723

Gehren T., Shi J.R., Zhang H.W., Zhao G., Korn A.J. 2006
Na, Mg and Al abundances as a population discriminant for nearby metal-poor stars,
Astron. Astrophys. 451, 1065

Hill G.H., MacQueen P.J., Palunas P., Kelz A., Roth M.M., Gebhardt K., Grupp F. 2005
VIRUS: a hugely replicated integral field spectrograph for HETDEX,
New Astronomy Reviews, 50, 378

Grupp F. 2005
Measuring the Properties of Optical Fibers: First Results from the AIP Fiber Testbench for Fiber Bundle IFUs,
New Astronomy Reviews
50, 323

Hill G.J., MacQueen P.J., Palunas P., Kelz A., Roth M.M., Gebhardt K., Grupp F. 2005
VIRUS: a hugely replicated integral field spectrograph for HETDEX,
New Astronomy Reviews, submitted

Grupp F. 2004
MAFAGS-OS: New opacity sampling model atmospheres for A, F and G stars II. Temperature determination and three "standard" stars,
A
stron. Astrophys. 426, 309-322

Shi J.R., Gehren T., Zhao G. 2004
Sodium abundances in nearby disk stars, Astron. Astrophys. 423, 683

Grupp F. 2004
MAFAGS-OS: New opacity sampling model atmospheres for A, F and G stars I. The model and the solar flux
A
stron. Astrophys. 420, 289-305

Gehren T., Liang Y.C., Shi J.R., Zhang H.W., Zhao G. 2004
Abundances of Na, Mg and Al in nearby metal-poor stars, Astron. Astrophys. 413, 1045

Grupp F. 2003
The nature of the fiber noise with the FOCES spectrograph. Nature, modeling and a way to achieve S/N > 400,
Astron. Astrophys. 412, 897

Korn A.J., Shi J., Gehren T. 2003
Kinetic equilibrium of iron in the atmospheres of cool dwarf stars. III. The ionization equilibrium of selected reference stars,
Astron. Astrophys. 407, 691

Mashonkina L., Gehren T., Travaglio C., Borkova T. 2003
Mg, Ba and Eu abundances in thick disk and halo stars, Astron. Astrophys. 397, 275

Christlieb N., Bessell M. S., Beers T. C., Gustafsson B., Korn A., Barklem P. S., Karlsson T., Mizuno-Wiedner M., Rossi S. 2002
A stellar relic from the early Milky Way, Nature 419, 904

Korn A. 2002
Rectifying échelle Spectra - A Comparison Between UVES, FEROS and FOCES,
Scientific Drivers for ESO Future VLT/VLTI Instrumentation Proceedings of the ESO Workshop held in Garching, Germany, p. 199

Gehren T., Korn A.J., Shi J. 2001
Kinetic equilibrium of iron in the atmospheres of cool dwarf stars. II. Weak Fe I lines in the solar spectrum,
Astron. Astrophys. 380, 645

Mashonkina L., Gehren T. 2001
Heavy element abundances in cool dwarf stars: An implication for the evolution of the Galaxy
, Astron. Astrophys. 376, 232

Bernkopf J., Fiedler A., Fuhrmann K. 2001
The Dark Side of the Milky Way, in Astrophysical Ages and Time Scales, ASP Conf.Ser. 245

Korn A.J., Gehren T. 2001
New gravities for old stars, in Astrophysical Ages and Time Scales, ASP Conf.Ser. 245, 337

Gehren T., Butler K., Mashonkina L., Reetz J., Shi J. 2001
Kinetic equilibrium of iron in the atmospheres of cool dwarf stars. I. The solar iron spectrum, Astron. Astrophys. 366, 981

Mashonkina L., Gehren T. 2001
Barium and europium abundances in cool dwarf stars and nucleosynthesis of heavy elements
, Astron. Astrophys. 364, 249

Korn A.J., Gehren T. 2000
Hipparcos and the distance scale to local halo stars, in Dynamics of Star Clusters and the Milky Way, ASP Conf.Ser., in press

Fuhrmann K. 2000
Nearby stars of the Galactic disk and halo. II., Astron. Astrophys., submitted

Fuhrmann K. 2000
The Deep Thick Disk as Seen by UVES, Proc. 2nd Samos Meeting on Cosmology, Geometry and Relativity, Pythagoreon, p. 351

Fuhrmann K. 2000
The Deep Thick Disk as Seen by UVES, Proc. VLT Opening Symposium, Antofagasta, eds. J. Bergeron and A. Renzini,. Berlin, p. 351

Fuhrmann K. 2000
And if Thick-Disk stars were the First Stars?, The First Stars. Proceedings of the MPA/ESO Workshop, eds. Achim Weiss, Tom G. Abel, Vanessa Hill,. Berlin, p. 68

Zhao G., Gehren T. 2000
Non-LTE analysis of neutral magnesium in cool stars, Astron. Astrophys. 362, 1077

Korn A.J., Gehren T. 2000
Gravities of Metal-Poor Halo Dwarfs and the Age of the Universe, MPA/ESO Workshop on "The First Stars", p.75

Zhao G., Gehren T. 2000
NLTE Analysis of Magnesium in Cool Stars, Proc. of the 35th Liege International Astrophysics Colloquium, eds. A. Noels et al., Liege, p.277

Christlieb N., Reimers D., Wisotzki L., Reetz J., Gehren T., Beers T. 1999
Finding the First Stars: The Hamburg/ESO Objective Prism Survey, MPA/ESO Workshop on "The First Stars", p.49

Christlieb N., Wisotzki L., Reimers D., Gehren T., Reetz J., Beers T. 1999
An Automated Search for Metal-Poor Halo Stars in the Hamburg/ESO Objective-Prism Survey, ASP Conf.Ser. 165, 259

Fuhrmann, K., Bernkopf, J. 1999
HR 4657 - evidence for a thick-disk field blue straggler, Astron.Astrophys., 347, 897

Gehren T., Ottmann R., Reetz J. 1999
Photospheric metal abundances of AR Lacertae, Astron. Astrophys., 344, 221

Mashonkina, L., Gehren, T., Bikmaev, I. 1999
Barium abundances in cool dwarf stars as a constraint to s- and r-process nucleosynthesis, Astron.Astrophys., 343, 519

Fuhrmann, K. 1999
The Disk Populations in the [Mg/H]-[Fe/Mg] Plane, Astrophys.Space Sci. 265, 265

Reetz J. 1999 Oxygen Abundances in the Sun and Metal-Deficient Stars, in: Galaxy Evolution: Connecting the Distant Universe with the Local Fossil Record, Meudon, France, p.171

Bernkopf J., Fuhrmann K. 1999 Old Subgiants and the Onset of Thin-Disk Formation, in: Galaxy Evolution: Connecting the Distant Universe with the Local Fossil Record, Meudon, France

Mao Shude, Reetz J., Lennon, D.J. 1998
Detecting Luminous Gravitational Microlenses Using Spectroscopy, Astron. Astrophys. 338, 56

Ottmann R., Pfeiffer M.J., Gehren T. 1998
Photospheric metal abundances in active stellar atmospheres, Astron. Astrophys. 338, 651

Baumüller, D., Butler, K., Gehren, T. 1998
Sodium in the Sun and in metal-poor stars, Astron. Astrophys. 338, 637

Fuhrmann K. 1998
Nearby stars of the Galactic disk and halo, Astron. Astrophys. 338, 161

Fuhrmann, K., Pfeiffer, M.J., Bernkopf, J. 1998
Solar-type stars with planetary companions: u And, r1 Cnc, t Boo, 16 Cyg and r CrB, Astron. Astrophys. 336, 942

Pfeiffer, M.J., Frank, C., Baumüller, D., Fuhrmann, K., Gehren, T. 1998
FOCES - a fibre optics Cassegrain échelle spectrograph, Astron. Astrophys. Suppl., 130, 381

Zhao Gang, Butler, K., Gehren, T. 1998
Non-LTE analysis of neutral magnesium in the solar atmosphere, Astron. Astrophys. 333, 219

Bernkopf, J. 1998
Unified stellar models and convection in cool stars, Astron. Astrophys. 332, 127

Fuhrmann K. 1998
Surface gravities of very metal-poor stars from Hipparcos parallaxes, Astron. Astrophys. 330, 626

Schlattl, H., Weiss, A., Ludwig, H.-G., Bernkopf, J. 1997 A precision-controlled solar model with realistic subatmospheric stratification , in Solar Convection and Oscillations and their Relationship, eds. F.P. Pijpers, J. Christensen-Dalsgaard, and C.S. Rosenthal, Kluwer, p. 65

Lennon, D.J., Mao Shude, Reetz J., Gehren T., Yan L., Renzini A. 1997
Real-Time Spectroscopic Observations of Gravitational Microlensing Events - Probing the Evolution of the Galactic Bulge, The Messenger 90, 30

Fuhrmann, K., Pfeiffer, M.J., Bernkopf, J. 1997
Solar-type stars with planetary companions: 51 Pegasi and 47 Ursae Majoris, Astron. Astrophys., 326, 1081

Baumüller, D., Gehren, T. 1997
Aluminium in metal-poor stars, Astron. Astrophys., 325, 1088

Fuhrmann, K., Pfeiffer, M., Frank, C., Reetz, J., Gehren, T. 1997
The surface gravities of cool dwarf stars revisited, Astron. Astrophys., 323, 909

Lennon, D.J., Shude Mao, Fuhrmann, K., Gehren, T. 1996
The First Spectroscopic Observations of Caustic-Crossing In A Binary Microlensing Event, Astrophys. J. Lett. 471, L23

Bedding, T.R., Kjeldsen, H., Reetz, J., Barbuy, B. 1996
Measuring stellar oscillations using equivalent widths of absorption lines, Mon. Not. R. Astron. Soc., 280, 1155

Baumüller, D., Gehren, T. 1996
Line formation of neutral aluminium in the Sun, Astron. Astrophys. 307, 961
(figures not included, 50 kB)


Last revision: March 25, 2010

Thomas Gehren (gehren@usm.lmu.de)