Item Type No Grouping

Article

The ESO supernovae type Ia progenitor survey (SPY) : The radial velocities of 644 DA white dwarfs. (2019) R. Napiwotzki, C. A. Karl, T. Lisker, S. Catalan, H. Drechsel, U. Heber, D. Homeier, D. Koester, B. Leibundgut, T. R. Marsh, S. Moehler, G. Nelemans, D. Reimers, A. Renzini, A. Stroer and L. Yungelson

Ultraviolet-excess sources with a red/infrared counterpart : Low-mass companions, debris discs and QSO selection. (2014) K. Verbeek, Paul J. Groot, Simone Scaringi, Jorge Casares, Jesus M. Corral-Santana, Niall Deacon, J.E. Drew, B.T. Gänsicke, E. Gonzalez-Solares, R. Greimel, U. Heber, R. Napiwotzki, R.H. Ostensen, D. Steeghs, N.J. Wright and A. Zijlstra

Spectroscopic follow-up of ultraviolet-excess objects selected from the UVEX survey. (2012) K. Verbeek, P.J. Groot, S. Scaringi, G. Nelemans, R. Napiwotzki, B. Spikings, J.E. Drew, R.H. Østensen, D. Steeghs, B.T. Gänsicke, J. Casares, J.M. Corral-Santana, R.L.M. Corradi, Niall Deacon, J.J. Drake, E. González-Solares, M.J. Irwin, R. Greimel, U. Heber and C. Knigge

MUCHFUSS - massive unseen companions to hot faint underluminous stars from SDSS. (2012) S. Geier, V. Schaffenroth, H. Hirsch, A. Tillich, U. Heber, P. F. L. Maxted, R. H. Ostensen, B. N. Barlow, S. J. O'Toole, T. Kupfer, T. Marsh, B. Gaensicke, R. Napiwotzki, O. Cordes, S. Mueller, L. Classen, E. Ziegerer and H. Drechsel

Binaries discovered by the MUCHFUSS project SDSS J08205+0008 - An eclipsing subdwarf B binary with brown dwarf companion. (2011) S. Geier, V. Schaffenroth, H. Drechsel, U. Heber, T. Kupfer, A. Tillich, R. Ostensen, K. Smolders, P. Degroote, P.F.L. Maxted, B.N. Barlow, B.T. Gansicke, T.R. Marsh and R. Napiwotzki

Binaries discovered by the SPY survey VI : Discovery of a low mass companion to the hot subluminous planetary nebula central star EGB5-a recently ejected common envelope? (2011) S. Geier, R. Napiwotzki, U. Heber and G. Nelemans

The Hyper-MUCHFUSS project : probing the Galactic halo with sdB stars. (2011) A. Tillich, U. Heber, S. Geier, H. Hirsch, P.F.L. Maxted, B.T. Gansicke, T.R. Marsh, R. Napiwotzki, R. Ostensen and R.D. Scholz

The MUCHFUSS project - Searching for hot subdwarf binaries with massive unseen companions : survey, target selection and atmospheric parameters. (2011) S. Geier, H. Hirsch, A. Tillich, P.F.L. Maxted, S.J. Bentley, R. Ostensen, U. Heber, B.T. Gansicke, T.R. Marsh, R. Napiwotzki, B.N. Barlow and S. O'Toole

Massive unseen companions to hot faint underluminous stars from SDSS (MUCHFUSS) - Analysis of seven close subdwarf B binaries. (2011) S. Geier, P.F.L. Maxted, R. Napiwotzki, R. Ostensen, U. Heber, H. Hirsch, T. Kupfer, S. Muller, A. Tillich, B.N. Barlow, R. Oreiro, T.A. Ottosen, C. Copperwheat, B.T. Gansicke and T.R. Marsh

Binaries discovered by the SPY project: V. GD 687 – a massive double degenerate binary progenitor that will merge within a Hubble time. (2010) S. Geier, U. Heber, T. Kupfer and R. Napiwotzki

Hot subdwarf stars in close-up view. I. Rotational properties of subdwarf B stars in close binary systems and nature of their unseen companions. (2010) S. Geier, U. Heber, P. Podsiadlowski, H. Edelmann, R. Napiwotzki, T. Kupfer and S. Muller

High resolution UVES/VLT spectra of white dwarfs observed for the ESO SN Ia Progenitor Survey III. DA white dwarfs. (2009) D. Koester, B. Voss, R. Napiwotzki, N. Christlieb, D. Homeier, T. Lisker, D. Reimers and U. Heber

The B-type giant HD 271791 in the Galactic halo : Linking run-away stars to hyper-velocity stars. (2008) U. Heber, H. Edelmann, R. Napiwotzki, M. Altmann and R.D. Scholz

LMC origin of the hyper-velocity star HE 0437-5439: Beyond the supermassive black hole paradigm. (2008) N. Przybilla, M.A. Nieva, U. Heber, M. Firnstein, K. Butler, R. Napiwotzki and H. Edelmann

3D kinematics of white dwarfs from the SPY project. II. (2006) E.M. Pauli, R. Napiwotzki, U. Heber, M. Altmann and M. Odenkirchen

Rotation velocities of white dwarfs. III. DA stars with convective atmospheres. (2005) C. Karl, R. Napiwotzki, U. Heber, S. Dreizler, D. Koester and I.N. Reid

Hot subdwarfs from the ESO Supernova Ia Progenitor Survey. I. Atmospheric parameters and cool companions of sdB stars. (2005) T. Lisker, U. Heber, R. Napiwotzki, N. Christlieb, Z. Han, D. Homeier and D. Reimers

HE 0437-5439: an unbound hypervelocity main-sequence B-type star. (2005) H. Edelmann, R. Napiwotzki, U. Heber, N. Christlieb and D. Reimers

Close binary EHB stars from SPY. (2004) R. Napiwotzki, C. Karl, T. Lisker, U. Heber, N. Christlieb, D. Reimers, G. Nelemans and D. Homeier

HS 2333 3927: A new sdB dM binary with a large reflection effect. (2004) U. Heber, H. Drechsel, R. Ostensen, C. Karl, R. Napiwotzki, M. Altmann, O. Cordes, J.E. Solheim, B. Voss, D. Koester and S. Folkes

FUSE Observations of EC14026 Stars. (2004) P. Chayer, G. Fontaine, M. Fontaine, R. Lamontagne, F. Wesemael, J. Dupuis, U. Heber, R. Napiwotzki and S. Moehler

HS 2333 + 3927: a new sdB binary with a large reflection effect. (2004) C. Karl, U. Heber, H. Drechsel, R. Napiwotzki, M. Altmann, R. Ostensen, S. Folkes, J.E. Solheim, O. Cordes, B. Voss and D. Koester

Spectral types and masses of white dwarfs in globular clusters. (2004) S. Moehler, D. Koester, M. Zoccali, F.R. Ferraro, U. Heber, R. Napiwotzki and A. Renzini

Spectroscopic analysis of sdB stars from the ESO Supernova Ia Progenitor Survey. (2004) T. Lisker, U. Heber, R. Napiwotzki, N. Christlieb, Z. Han, D. Homeier and D. Reimers

Discovery of a helium-core white dwarf progenitor. (2003) U. Heber, H. Edelmann, T. Lisker and R. Napiwotzki

Binaries discovered by the SPY project. III. HE 2209-1444: A massive, short period double degenerate. (2003) C. Karl, R. Napiwotzki, G. Nelemans, N. Christlieb, D. Koester, U. Heber and D. Reimers

3D kinematics of white dwarfs from the SPY project. (2003) E.M. Pauli, R. Napiwotzki, M. Altmann, U. Heber, M. Odenkirchen and F. Kerber

Spectral analysis of sdB Stars from the Hamburg Quasar Survey. (2003) H. Edelmann, U. Heber, H.J. Hagen, S. Dreizler, R. Napiwotzki, D. Engels and M. Lemke

SPY - the ESO Supernovae type Ia Progenitor survey. (2003) R. Napiwotzki, N. Christlieb, H. Drechsel, H.J. Hagen, U. Heber, D. Homeier, C. Karl, D. Koester, B. Leibundgut, T.R. Marsh, S. Moehler, G. Nelemans, E.M. Pauli, D. Reimers, A. Renzini and L. Yungelson

Resolving subdwarf B stars in binaries by HST imaging. (2002) U. Heber, S. Moehler, R. Napiwotzki, P. Thejll and E. Green

HS 0705 6700: A new eclipsing sdB binary. (2001) H. Drechsel, U. Heber, R. Napiwotzki, R. Ostensen, J.E. Solheim, F. Johannessen, S.L. Schuh, J. Deetjen and S. Zola

High-resolution UVES/VLT spectra of white dwarfs observed for the ESO SN Ia progenitor survey (SPY). I. (2001) D. Koester, R. Napiwotzki, N. Christlieb, H. Drechsel, H.J. Hagen, U. Heber, D. Homeier, C. Karl, B. Leibundgut, S. Moehler, G. Nelemans, D. Reimers, E.M. Pauli, A. Renzini and L. Yungelson

Binaries discovered by the SPY project. I. HE 1047-0436: A subdwarf B white dwarf syste. (2001) R. Napiwotzki, H. Edelmann, U. Heber, C. Karl, H. Drechsel, E.M. Pauli and N. Christlieb

Metal abundances of sdB stars. (2001) H. Edelmann, U. Heber and R. Napiwotzki

Search for progenitors of supernovae type Ia with SPY. (2001) R. Napiwotzki, N. Christlieb, H. Drechsel, H.J. Hagen, U. Heber, D. Homeier, C. Karl, D. Koester, B. Leibundgut, T.R. Marsh, S. Moehler, G. Nelemans, E.M. Pauli, D. Reimers, A. Renzini and L. Yungelson

First VLT spectra of white dwarfs in a globular cluster. (2000) S. Moehler, U. Heber, R. Napiwotzki, D. Koester and A. Renzini

Abundances of UV bright stars in globular clusters. I. ROA 5701 in omega Centauri and Barnard 29 in M 13. (1998) S. Moehler, U. Heber, M. Lemke and R. Napiwotzki

Monograph

Spectral Analysis of sdB Stars from the Hamburg ESO Survey. (2001) H. Edelmann, U. Heber, R. Napiwotzki, M. Lemke and N. Christlieb

Conference or Workshop Item

NLTE spectral analysis of helium-rich sdO stars from the southern HK survey. (1996) J.S. Drilling, R. Napiwotzki, S. Dreizler, U. Heber and T.C. Beers

Other

Binary sdB Stars with Massive Compact Companions. (2008) S. Geier, C. Karl, H. Edelmann, U. Heber and R. Napiwotzki

Hypervelocity Stars: Young and Heavy or Old and Light? (2008) U. Heber, H. Hirsch, H. Edelmann, R. Napiwotzki, S. O'Toole, W. Brown and M. Altmann

Metal Abundances of Subdwarf B Stars from SPY - a Pattern Emerges. (2008) S. Geier, U. Heber and R. Napiwotzki

Model Spectra of Hot Subdwarfs for the Gaia Mission. (2008) Luke Hindson, R. Napiwotzki, U. Heber and M. Lemke

Radial Velocity Variable sdO/Bs from SPY - Preliminary Orbits of Three New Short Period Binaries. (2008) S. Geier, U. Heber and R. Napiwotzki

3D-Kinematics of White Dwarfs from the SPY-Project. (2007) R. Richter, U. Heber and R. Napiwotzki

Binary White Dwarfs in the Supernova Ia Progenitor Survey. (2007) R. Napiwotzki, C. Karl, G. Nelemans, L. Yungelson, N. Christlieb, H. Drechsel, U. Heber, D. Homeier, D. Koester, B. Leibundgut, T.R. Marsh, S. Moehler, A. Renzini and D. Reimers

Spectroscopic Analysis of Subluminous B Stars in Binaries with Compact Companions. (2007) S. Geier, C. Karl, H. Edelmann, U. Heber and R. Napiwotzki

The Subdwarf B + White Dwarf Binary KPD 1930+2752, a Supernova Type Ia Progenitor Candidate. (2007) S. Geier, S. Nesslinger, U. Heber, N. Przybilla, R. Napiwotzki and R-P. Kudritzki

The Mass of the sdB Primary of the Binary HS 2333+3927. (2005) U. Heber, H. Drechsel, C. Karl, R. Ostensen, S. Folkes, R. Napiwotzki, M. Altmann, O. Cordes, J.E. Solheim, B. Voss and D. Koester

New Results from the Supernova Ia Progenitor Survey. (2005) R. Napiwotzki, C. Karl, G. Nelemans, L. Yungelson, N. Christlieb, H. Drechsel, U. Heber, D. Homeier, D. Koester, J. Kruk, B. Leibundgut, T.R. Marsh, S. Moehler, A. Renzini and D. Reimers

Rotation Velocities of DA White Dwarfs with Convective Atmospheres. (2005) C. Karl, U. Heber, R. Napiwotzki, S. Dreizler, D. Koester and I.N. Reid

Subdwarf B Binaries from the SPY Project. (2005) C. Karl, U. Heber and R. Napiwotzki

Subdwarf B Stars from the ESO Supernova Ia Progenitor Survey -- Observation versus Theory. (2005) T. Lisker, U. Heber, R. Napiwotzki, N. Christlieb, Z. Han, D. Homeier and D. Reimers

Subluminous O Stars from the ESO Supernova Progenitor Survey - Observation versus Theory. (2005) A. Stroeer, U. Heber, T. Lisker, R. Napiwotzki and S. Dreizler

Double Degenerate and Progenitors of Supernovae Type Ia. (2004) R. Napiwotzki, L. Yungelson, G. Nelemans, T.R. Marsh, B. Leibundgut, A. Renzini, D. Homeier, D. Koester, S. Moehler, N. Christlieb, D. Reimers, H. Drechsel, U. Heber, C. Karl and E.M. Pauli

NLTE Spectral Analysis of Iron Group Elements in the Hot Subluminous O-star BD+28 4211. (2003) M. Ramspeck, S. Haas, R. Napiwotzki, U. Heber, J. Deetjen and S. Dreizler

Stellar Wind Signatures in sdB Stars. (2003) U. Heber, P.F.L. Maxted, T.R. Marsh, C. Knigge and J.E. Drew

Spectral Monitoring of HS 0209+0832 a DAB White Dwarf in the DB Gap. (2001) H. Edelmann, U. Heber and R. Napiwotzki

Spectral analysis of sdB Stars from the Hamburg ESO Survey. (2001) H. Edelmann, U. Heber, R. Napiwotzki, M. Lemke and N. Christlieb

Spectral analysis of hot subluminous stars. (1999) U. Heber, H. Edelmann, M. Lemke, R. Napiwotzki and D. Engels

Spectral analysis of the binary sdB star Feige 36. (1999) H. Edelmann, U. Heber, R. Napiwotzki, I.N. Reid and R. Saffer