Ralf-Dieter Scholz

Epsilon Indi Ba, Bb: a detailed study of the nearest known brown dwarfs (2009)

King, Robert R., McCaughrean, Mark J., Homeier, Derek, Allard, France, Scholz, Ralf-Dieter, Lodieu, Nicolas

The discovery of epsilon Indi Ba, Bb, a binary brown dwarf system very close to the Sun, makes possible a concerted campaign to characterise the physical parameters of two T dwarfs. Recent...

The Seventh Data Release of the Sloan Digital Sky Survey (2009)

Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...

This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDSS-II. It includes...

Epsilon Indi Ba, Bb: a spectroscopic study of the nearest known brown dwarfs (2008)

King, Robert R., McCaughrean, Mark J., Homeier, Derek, Allard, France, Scholz, Ralf-Dieter, Lodieu, Nicolas

The discovery of Epsilon Indi Ba and Bb, a nearby binary brown dwarf system with a main-sequence companion, allows a concerted campaign to characterise the physical parameters of two T dwarfs...

Ultracool Subdwarfs: The Halo Population Down to the Substellar Limit (2008)

Burgasser, Adam J., Lepine, Sebastien, Lodieu, Nicolas, Scholz, Ralf-Dieter, Delorme, Phillippe, Jao, Wei-Chun, ...

Ultracool subdwarfs are low luminosity, late-type M and L dwarfs that exhibit spectroscopic indications of subsolar metallicity and halo kinematics. Their recent discovery and ongoing investigation...

Twenty-three new ultra-cool subdwarfs from the Sloan Digital Sky Survey (2008)

Lepine, Sebastien, Scholz, Ralf-Dieter

A search of the Sloan Digital Sky Survey spectroscopic database has turned up 23 new ultra-cool subdwarfs, low-mass metal-poor stars of spectral subtype M 7.0 or later. Spectra from these red objects...

Search for nearby stars among proper motion stars selected by optical-to-infrared photometry III. Spectroscopic distances of 322 NLTT stars (2005)

Scholz, Ralf-Dieter, Meusinger, Helmut, Jahreiß, Hartmut

Distance estimates based on low-resolution spectroscopy and Two Micron All Sky Survey (2MASS) J magnitudes are presented for a large sample of 322 nearby candidates from Luyten's NLTT catalogue....

SSSPMJ0829-1309: A new nearby L dwarf detected in SuperCOSMOS Sky Surveys (2002)

Scholz, Ralf-Dieter, Meusinger, Helmut

The SuperCOSMOS Sky Surveys provide a complete coverage of the Southern sky in three passbands (photographic B_J, R and I) and at different epochs (Hambly et al. 2001a,b,c). These data are the basis...

Search for nearby stars among proper motion stars selected by optical-to-infrared photometry. II. Two late M dwarfs within 10 pc (2002)

McCaughrean, Mark J., Scholz, Ralf-Dieter, Lodieu, Nicolas

We have identified two late M dwarfs within 10 parsecs of the Sun, by cross-correlating the Luyten NLTT catalogue of stars with proper motions larger than 0.18 arcsec/yr, with objects lacking optical...