Publications (94)
Spatial and temporal variations of fundamental constants
S. A. Levshakov, I. I. Agafonova, P. Molaro +1
Six New ZZ Ceti Stars from the SPY and the HQS Surveys
B. Voss, D. Koester, R. Ãstensen +3
A Concordance Model of the Lyman-alpha Forest at z = 1.95
T. Jena, M. L. Norman, D. Tytler +12
Metal-rich absorbers at high redshifts: abundance patterns
S. A. Levshakov, I. I. Agafonova, P. Molaro +2
Hot subdwarfs from the ESO Supernova Ia Progenitor Survey: II. Atmospheric parameters of subdwarf O stars
A. Stroeer, U. Heber, T. Lisker +4
Future mmVLBI Research with ALMA: A European vision
R. P. J. Tilanus, T. P. Krichbaum, J. A. Zensus +165
Spectral shape of the UV ionizing background and OVI absorbers at z ~ 1.5 towards HS0747+4259
D. Reimers, I. I. Agafonova, S. A. Levshakov +5
A rotating helical filament in the L1251 dark cloud
S. A. Levshakov, D. Reimers, C. Henkel
Searching for chameleon-like scalar fields with the ammonia method. II. Mapping of cold molecular cores in NH3 and HC3N lines
S. A. Levshakov, A. V. Lapinov, C. Henkel +4
The baryon density at z=0.9-1.9 - Tracing the warm-hot intergalactic medium with broad Lyman alpha absorption
N. Prause, D. Reimers, C. Fechner +1
The UVES Large Program for Testing Fundamental Physics II: Constraints on a Change in μ Towards Quasar HE 0027-1836
H. Rahmani, M. Wendt, R. Srianand +14
High-Resolution Spectra Observed for SPY. II. DB and DBA Stars
B. Voss, D. Koester, R. Napiwotzki +2
Fundamental constants and high resolution spectroscopy
P. Bonifacio, H. Rahmani, J. B. Whitmore +14
Evolution strategies applied to the problem of line profile decomposition in QSO spectra
R. Quast, R. Baade, D. Reimers
The warm circumstellar envelope and wind of the G9 IIb star HR 6902
T. Kirsch, R. Baade, D. Reimers
Nitrogen-deficient and iron-rich associated absorbers with oversolar metallicities towards the quasar HE0141-3932
S. A. Levshakov, I. I. Agafonova, D. Reimers +3
Star-forming regions of the Aquila rift cloud complex. I. NH3 tracers of dense molecular cores
S. A. Levshakov, C. Henkel, D. Reimers +4
The UVES Large Program for Testing Fundamental Physics: I Bounds on a change in alpha towards quasar HE 2217-2818
P. Molaro, M. Centurion, J. B. Whitmore +14
Finding the First Stars: The Hamburg/ESO Objective Prism Survey
N. Christlieb, D. Reimers, L. Wisotzki +3
Sensitivity of the isotopologues of hydronium to variation of the electron-to-proton mass ratio
M. G. Kozlov, S. G. Porsev, D. Reimers
Search for progenitors of supnernovae type Ia with SPY
R. Napiwotzki, N. Christlieb, H. Drechsel +13
The Hamburg/RASS optical identification project
F. -J. Zickgraf, D. Engels, H. -J. Hagen +1
Binaries discovered by the SPY project. III. HE2209-1444: a massive, short period double degenerate
C. A. Karl, R. Napiwotzki, G. Nelemans +4
The Hamburg/ESO R-process Enhanced Star survey (HERES) II. Spectroscopic analysis of the survey sample
P. S. Barklem, N. Christlieb, T. C. Beers +7
HE 0515-4414 - an unusual sub-damped Ly alpha system revisited
R. Quast, D. Reimers, R. Baade
Cool helium-rich white dwarfs from the Hamburg/ESO Survey
S. Friedrich, D. Koester, N. Christlieb +2
FUSE observations of the HeII Lyman alpha forest towards HS1700+6416
D. Reimers, C. Fechner, G. Kriss +5
A new measure of Delta alpha/alpha at redshift z = 1.84 from very high resolution spectra of Q1101-264
S. A. Levshakov, P. Molaro, S. Lopez +5
The Hamburg/RASS Catalogue of optical identifications. Northern high-galactic latitude ROSAT Bright Source Catalogue X-ray sources
F. -J. Zickgraf, D. Engels, H. -J. Hagen +2
High-resolution UVES/VLT spectra of white dwarfs observed for the ESO SN Ia Progenitor Survey. III. DA white dwarfs
D. Koester, B. Voss, R. Napiwotzki +5
The HeII Lyman alpha forest and the thermal state of the IGM
C. Fechner, D. Reimers
Searching for chameleon-like scalar fields with the ammonia method
S. A. Levshakov, P. Molaro, A. V. Lapinov +3
Detection of molecular hydrogen at z=1.15 toward HE 0515-4414
D. Reimers, R. Baade, R. Quast +1
Close binary EHB stars from SPY
R. Napiwotzki, C. A. Karl, T. Lisker +5
Damped Lyman alpha systems at z=0.68 and z=1.15 towards HE 1122-1649 and HE 0515-4414
A. de la Varga, D. Reimers, D. Tytler +2
Search for double degenerate progenitors of supernovae type Ia with SPY
R. Napiwotzki, H. Drechsel, U. Heber +13
Photoionized OVI absorbers toward the bright QSO HE 0515-4414
S. A. Levshakov, I. I. Agafonova, D. Reimers +1
Limits on the spatial variations of the electron-to-proton mass ratio in the Galactic plane
S. A. Levshakov, D. Reimers, C. Henkel +4
Mining the Digital Hamburg/ESO Objective Prism Survey
N. Christlieb, L. Wisotzki, D. Reimers
A hydrodynamic study of the circumstellar envelope of alpha Scorpii
K. Braun, R. Baade, D. Reimers +1
Double degenerates and progenitors of supernovae type Ia
R. Napiwotzki, L. Yungelson, G. Nelemans +12
Identification of a DO white dwarf and a PG1159 star in the ESO SN Ia progenitor survey (SPY)
K. Werner, T. Rauch, R. Napiwotzki +3
Transition frequency shifts with fine structure constant variation for Fe II: Breit and core-valence correlation correction
S. G. Porsev, K. V. Koshelev, I. I. Tupitsyn +3
Bright Metal-Poor Stars from the Hamburg/ESO Survey. I. Selection and Follow-up Observations from 329 Fields
A. Frebel, N. Christlieb, J. E. Norris +9
Cosmochemistry, Cosmology and Fundamental Constants: High-Resolution Spectroscopy of Damped Lyman-Alpha Systems
R. Quast, D. Reimers, A. Smette +4
The UV spectrum of HS1700+6416 I. Predicting the metal line content of the far UV spectrum
C. Fechner, D. Reimers, A. Songaila +3
Most precise single redshift bound to Delta alpha/alpha
S. A. Levshakov, M. Centurion, P. Molaro +4
The local luminosity function of QSOs and Seyfert 1 nuclei
T. Koehler, D. Groote, D. Reimers +1
Patchy intergalactic HeII absorption in HE 2347-4342. - The possible discovery of the epoch of He-reionization
D. Reimers, S. Koehler, L. Wisotzki +3
Evidence for a magnitude-dependent bias in the Hamburg/ESO Survey for Damped Lyman-alpha Systems
A. Smette, L. Wisotzki, C. Ledoux +3
Metal Abundances in a Damped Lyman-alpha System Along Two Lines of Sight at z=0.93
S. Lopez, D. Reimers, M. D. Gregg +3
The stellar content of the Hamburg/ESO survey. II. A large, homogeneously-selected sample of high latitude carbon stars
N. Christlieb, P. J. Green, L. Wisotzki +1
Intergalactic HeII absorption towards QSO 1157+3143
D. Reimers, C. Fechner, H. -J. Hagen +3
HE 0557-4840 - Ultra-Metal-Poor and Carbon-Rich
John E. Norris, N. Christlieb, A. J. Korn +5
Most precise single redshift bound to the variability of the fine-structure constant
S. A. Levshakov, M. Centurion, P. Molaro +4
A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines
S. A. Levshakov, D. Reimers, M. G. Kozlov +2
The HeII Lyman alpha forest: evaluation of simulated data
C. Fechner, D. Reimers
Searching for Chameleon-like Scalar Fields
S. A. Levshakov, P. Molaro, M. G. Kozlov +5
Mid- and far-infrared fine-structure line sensitivities to hypothetical variability of the fine-structure constant
M. G. Kozlov, S. G. Porsev, S. A. Levshakov +2
Identification of a DO White Dwarf and a PG1159 Star in the ESO SN Ia Progenitor Survey (SPY)
K. Werner, T. Rauch, R. Napiwotzki +3
The Evolution of Lyman alpha Absorbers in the Redshift Range 0.5<z<1.9
E. Janknecht, D. Reimers, S. Lopez +1
Hot subdwarfs from the ESO Supernova Ia Progenitor Survey - I. Atmospheric parameters and cool companions of sdB stars
T. Lisker, U. Heber, R. Napiwotzki +4
Binaries discovered by the SPY project. IV. Five single-lined DA double white dwarfs
G. Nelemans, R. Napiwotzki, C. Karl +8
Star-forming regions of the Aquila rift cloud complex. II. Turbulence in molecular cores probed by NH3 emission
S. A. Levshakov, C. Henkel, D. Reimers +1
The ESO supernovae type Ia progenitor survey (SPY)
R. Napiwotzki, C. A. Karl, T. Lisker +13
Cosmological observations to shed light on possible variations - expectations, limitations and status quo
M. Wendt, D. Reimers, P. Molaro
Sensitivity coefficients to $α$-variation for fine-structure transitions in Carbon-like ions
M. G. Kozlov, I. I. Tupitsyn, D. Reimers
Fluctuations of the intergalactic ionization field at redshift z ~ 2
I. I. Agafonova, S. A. Levshakov, D. Reimers +2
The Hamburg/ESO survey for bright QSOs. III. A large flux-limited sample of QSOs
L. Wisotzki, N. Christlieb, N. Bade +4
The stellar content of the Hamburg/ESO survey. III. Field horizontal-branch stars in the Galaxy
N. Christlieb, T. C. Beers, C. Thom +5
The stellar content of the Hamburg/ESO survey. V. The metallicity distribution function of the Galactic halo
T. Schoerck, N. Christlieb, J. G. Cohen +22
Search for double degenerate progenitors of supernovae type Ia with SPY
R. Napiwotzki, N. Christlieb, H. Drechsel +13
Double degenerates from the supernova Ia progenitor survey (SPY)
C. Karl, R. Napiwotzki, U. Heber +4
Discovery of four white dwarfs with strong magnetic fields by the Hamburg/ESO Survey
D. Reimers, S. Jordan, D. Koester +3
Four magnetic DB white dwarfs discovered by the Hamburg/ESO survey
D. Reimers, S. Jordan, V. Beckmann +2
HE 0141-3932: a bright QSO with an unusual emission line spectrum and associated absorption
D. Reimers, E. Janknecht, C. Fechner +3
The EUV variability of the luminous QSO HS 1700+6416
D. Reimers, H. -J. Hagen, J. Schramm +2
The Antares emission nebula and mass loss of alpha Sco A
D. Reimers, H. -J. Hagen, R. Baade +1
Binaries discovered by the SPY project. II. HE 1414-0848: a double degenerate with a mass close to the Chandrasekhar limit
R. Napiwotzki, D. Koester, G. Nelemans +6
The stellar content of the Hamburg/ESO survey. I. Automated selection of DA white dwarfs
N. Christlieb, L. Wisotzki, D. Reimers +3
Discovery of eleven new ZZ Ceti stars
B. G. Castanheira, S. O. Kepler, F. Mullally +8
An upper limit to the variation in the fundamental constants at redshift z = 5.2
S. A. Levshakov, F. Combes, F. Boone +3
The UV spectrum of HS1700+6416 II. FUSE observations of the HeII Lyman alpha forest
C. Fechner, D. Reimers, G. A. Kriss +11
Methanol as a tracer of fundamental constants
S. A. Levshakov, M. G. Kozlov, D. Reimers
The stellar content of the Hamburg/ESO survey. IV. Selection of candidate metal-poor stars
N. Christlieb, T. Schoerck, A. Frebel +3
Caught in the act: a helium-reionizing quasar near the line of sight to Q0302-003
P. Jakobsen, R. A. Jansen, S. Wagner +1
Transition frequency shifts with fine-structure constant variation for Fe I. Isotope shift calculations in Fe I and Fe II
S. G. Porsev, M. G. Kozlov, D. Reimers
Fluctuations of the intergalactic UV background towards two lines of sight
C. Fechner, D. Reimers
Spectral shape of the UV ionizing background and HeII absorption at redshifts 1.8 < z < 2.9
I. I. Agafonova, S. A. Levshakov, D. Reimers +4
Limits on the space-time variations of fundamental constants
S. A. Levshakov, C. Henkel, D. Reimers +1
Quasar spectral energy distribution in EUV restored from associated absorbers: indications to the HeII opacity of the quasar accretion disk wind
S. A. Levshakov, I. I. Agafonova, D. Reimers +2
Spectroscopic analysis of sdB stars from the ESO Supernova Ia Progenitor Survey
T. Lisker, U. Heber, R. Napiwotzki +3
Searching for spatial variations of alpha^2/mu in the Milky Way
S. A. Levshakov, P. Molaro, D. Reimers
Two new ZZ Ceti pulsators from the HS and HE surveys
R. Silvotti, B. Voss, I. Bruni +4