activity
19952019
most citedSpectral analysis of sdB stars from the Hamburg Quasar Survey

131 citations · 1.1k across the 33 of their papers we have counts for

collaborators

33 papers

astro-ph.EP2019★ 130 cited

A giant exoplanet orbiting a very low-mass star challenges planet formation models

J. C. Morales, A. J. Mustill, I. Ribas +179

Statistical analyses from exoplanet surveys around low-mass stars indicate that super-Earth and Neptune-mass planets are more frequent than gas giants around such stars, in agreeme…

astro-ph.EP2018★ 91 cited

The CARMENES search for exoplanets around M dwarfs: A low-mass planet in the temperate zone of the nearby K2-18

Paula Sarkis, Thomas Henning, Martin Kürster +22

K2-18 is a nearby M2.5 dwarf, located at 34 pc and hosting a transiting planet which was first discovered by the {\it K2} mission and later confirmed with {\it Spitzer Space Telesc…

astro-ph.CO2013★ 5 cited

Fluctuations of the intergalactic ionization field at redshift z ~ 2

I. I. Agafonova, S. A. Levshakov, D. Reimers +2

(Abridged) Aims. To probe the spectral energy distribution (SED) of the ionizing background radiation at z ~ 2 and to specify the sources contributing to the intergalactic radiatio…

astro-ph.SR2012★ 14 cited

A hydrodynamic study of the circumstellar envelope of alpha Scorpii

K. Braun, R. Baade, D. Reimers +1

Context: Both the absolute mass-loss rates and the mechanisms that drive the mass loss of late-type supergiants are still not well known. Binaries such as alpha Sco provide the mos…

astro-ph2008★ 26 cited

The Antares emission nebula and mass loss of alpha Sco A

D. Reimers, H. -J. Hagen, R. Baade +1

The Antares nebula is a peculiar emission nebula seen in numerous Fe II lines and in radio free-free emission, probably associated with the H II region caused by alpha Sco B in the…

astro-ph2007★ 26 cited

HS1857+5144: A hot and young pre-cataclysmic variable

A. Aungwerojwit, B. T. Gaensicke, P. Rodriguez-Gil +5

We report the discovery of a new white dwarf/M dwarf binary, HS1857+5144, identified in the Hamburg Quasar Survey (HQS). Time-resolved optical spectroscopy and photometry were carr…