Johan Holmberg

Details der Publikationsliste

Zeitraum

1977 - 2008

Anzahl

62

Co-Autoren

A comprehensive comparison of the Sun to other stars: searching for self-selection effects (2008)

Robles, Jose A., Lineweaver, Charles H., Grether, Daniel, Flynn, Chris, Egan, Chas A., Pracy, Michael B., ...

If the origin of life and the evolution of observers on a planet is favoured by atypical properties of a planet's host star, we would expect our Sun to be atypical with respect to such properties....

PITX2 gain-of-function induced defects in mouse forelimb development (2008)

Holmberg, Johan, Ingner, Gorel, Johansson, Curt, Leander, Peter, Hjalt, Tord A

Abstract Background Limb development and patterning originate from a complex interplay between the skeletal elements, tendons, and muscles of the limb. One of the genes involved in patterning of limb...

A comprehensive comparison of the sun to other stars: searching for self-selection effects (2008)

Robles, José A., Lineweaver, Charles H., Grether, Daniel, Flynn, Chris, Egan, Chas A., Pracy, Michael B., ...

If the origin of life and the evolution of observers on a planet is favored by atypical properties of a planet's host star, we would expect our Sun to be atypical with respect to such properties. The...

Studie av planerings- och produktionsprocess i sågverksbranschen (2008)

Holmberg, Johan, Karlsson, Daniel

 The sawmill industry is a relative fragmented industry that is in an economic upswing andwith a hard competition. The customers have high demands on their suppliers and the highcustomer demand make...

Studie av planerings- och produktionsprocess i sågverksbranschen (2008)

Holmberg, Johan, Karlsson, Daniel

 The sawmill industry is a relative fragmented industry that is in an economic upswing andwith a hard competition. The customers have high demands on their suppliers and the highcustomer demand make...

Natural resources in sub-Saharan Africa : assets and vulnerabilities (2008)

Holmberg, Johan

Africa is rich in oil and mineral resources, but has severe shortages of water and suffers from an accelerating pressure on its arable land and forests. Climate change is expected to cause major...

Broadband UBVRCIC photometry of horizontal-branch and metal-poor candidates from the HK and Hamburg/ESO surveys. I (2007)

Beers, Timothy C., Flynn, Chris, Rossi, Silvia, Sommer-Larsen, Jesper, Wilhelm, Ronald, Marsteller, Brian, ...

We report broadband UBV and/or BVRCIC CCD photometry for a total of 1857 stars in the thick-disk and halo populations of the Galaxy. The majority of our targets were selected as candidate field...

A Study of Propane and Propene Ammoxidation over the Mo-V-Nb-Te-Oxide System (2006)

Holmberg, Johan

The ammoxidation of propane is commonly regarded as being the future route for producing acrylonitrile, and the Mo-V-Nb-Te-oxide system studied here has thus far been seen as the most promising...

Broadband UBVRI Photometry of Horizontal-Branch and Metal-Poor Candidates from the HK and Hamburg/ESO Surveys. I (2006)

Beers, Timothy C., Flynn, Chris, Rossi, Silvia, Sommer-Larsen, Jesper, Wilhelm, Ronald, Marsteller, Brian, ...

We report broadband UBV and/or BVRI CCD photometry for a total of 1857 stars in the thick-disk and halo populations of the Galaxy. The majority of our targets were selected as candidate field...

On the mass-to-light ratio of the local Galactic disc and the optical luminosity of the Galaxy (2006)

Flynn, Chris, Holmberg, Johan, Portinari, Laura, Fuchs, Burkhard, Jahreiss, Hartmut

We measure the volume luminosity density and surface luminosity density generated by the Galactic disc, using accurate data on the local luminosity function and the disc's vertical structure. From...

Dizziness and fear of falling: A behavioural and physiological approach to Phobic Postural Vertigo (2006)

Holmberg, Johan

Dizziness is a common problem and it often co-exists with anxiety. Level of anxiety is the best predictor of handicap for dizzy patients. There is diagnostic controversy and few treatment programs...

On the mass-to-light ratio of the local Galactic disc and the optical luminosity of the galaxy (2006)

Flynn, Chris, Holmberg, Johan, Portinari, Laura, Fuchs, Burkhard, Jahreiß, Hartmut

We measure the volume luminosity density and surface luminosity density generated by the Galactic disc, using accurate data on the local luminosity function and the vertical structure of the disc....

The colours of the Sun (2005)

Holmberg, Johan, Flynn, Chris, Portinari, Laura

We compile a sample of Sun-like stars with accurate effective temperatures, metallicities and colours (from the UV to the near-IR). A crucial improvement is that the effective temperature scale of...

Kinematics of the Galactic Halo from Horizontal Branch stars in the Hamburg/ESO Survey (2005)

Thom, Christopher, Flynn, Chris, Bessell, Michael S., Hanninen, Jyrki, Beers, Timothy C., Christlieb, Norbert, ...

Large samples of Field Horizontal Branch (FHB) stars make excellent tracers of the Galactic halo; by studying their kinematics, one can infer important physical properties of our Galaxy. Here we...

Kinematics of the galactic halo from horizontal branch stars in the Hamburg/ESO survey (2005)

Thom, Christopher, Flynn, Chris, Bessell, Michael S., Hanninen, Jyrki, Beers, Timothy C., Christlieb, Norbert, ...

Large samples of field horizontal branch (FHB) stars make excellent tracers of the Galactic halo; by studying their kinematics, one can infer important physical properties of our Galaxy. Here we...

Kinematics of the galactic halo from horizontal branch stars in the Hamburg/ESO survey (2005)

Thom, Christopher, Flynn, Chris, Bessell, Michael S., Hanninen, Jyrki, Beers, Timothy C., Christlieb, Norbert, ...

Large samples of field horizontal branch (FHB) stars make excellent tracers of the Galactic halo; by studying their kinematics, one can infer important physical properties of our Galaxy. Here we...

Kinematics of the galactic halo from horizontal branch stars in the Hamburg/ESO survey (2005)

Thom, Christopher, Flynn, Chris, Bessell, Michael S., Hanninen, Jyrki, Beers, Timothy C., Christlieb, Norbert, ...

Large samples of field horizontal branch (FHB) stars make excellent tracers of the Galactic halo; by studying their kinematics, one can infer important physical properties of our Galaxy. Here we...

Kinematics of the galactic halo from horizontal branch stars in the Hamburg/ESO survey (2005)

Thom, Christopher, Flynn, Chris, Bessell, Michael S., Hanninen, Jyrki, Beers, Timothy C., Christlieb, Norbert, ...

Large samples of field horizontal branch (FHB) stars make excellent tracers of the Galactic halo; by studying their kinematics, one can infer important physical properties of our Galaxy. Here we...

Kinematics of the galactic halo from horizontal branch stars in the Hamburg/ESO survey (2005)

Thom, Christopher, Flynn, Chris, Bessell, Michael S., Hanninen, Jyrki, Beers, Timothy C., Christlieb, Norbert, ...

Large samples of field horizontal branch (FHB) stars make excellent tracers of the Galactic halo; by studying their kinematics, one can infer important physical properties of our Galaxy. Here we...

Ephrin-A2 reverse signaling negatively regulates neural progenitor proliferation and neurogenesis (2005)

Holmberg, Johan, Armulik, Annika, Senti, Kirsten-André, Edoff, Karin, Spalding, Kirsty, Momma, Stefan, ...

The number of cells in an organ is regulated by mitogens and trophic factors that impinge on intrinsic determinants of proliferation and apoptosis. We here report the identification of an additional...

Kinematics of the galactic halo from horizontal branch stars in the Hamburg/ESO survey (2005)

Thom, Christopher, Flynn, Chris, Bessell, Michael S., Hanninen, Jyrki, Beers, Timothy C., Christlieb, Norbert, ...

Large samples of field horizontal branch (FHB) stars make excellent tracers of the Galactic halo; by studying their kinematics, one can infer important physical properties of our Galaxy. Here we...

The local surface density of disc matter mapped by Hipparcos (2004)

Holmberg, Johan, Flynn, Chris

We determine the surface density of matter in the disc of the Galaxy at the solar position using K giant stars. The local space density and luminosity function of the giants is determined using...

White dwarfs and Galactic dark matter (2003)

Flynn, Chris, Holopainen, Janne, Holmberg, Johan

We discuss the recent discovery by Oppenheimer et al. of old, cool whitedwarf stars, which may be the first direct detection of Galactic halodark matter. We argue here that the contribution of more...

A Possible Bulge - Thick Disk Connection? (2003)

Bensby, Thomas, Feltzing, Sofia, Holmberg, Johan

We present abundances of giant stars in the Galactic bulge and thickdisk. The stellar sample contains approximately 15 bulge giants and 20thick disk giants observed with the UVES on VLT in Chile....

Metallicities and Ages in the Galactic Disk: a New Sample (2003)

Nordström, Birgitta, Andersen, Johannes, Holmberg, Johan, Jørgensen, Bjarne R.

Metallicities and Ages in the Galactic Disk: A New Large SampleMetallicities ages and full Galactic orbits have been derived for acomplete kinematically unbiased sample of 14.000 F and G dwarfs in...

Are Metallicity and Age Related in the Galactic Disk? (2003)

Nordström, Birgitta, Andersen, Johannes, Holmberg, Johan, Jørgensen, Bjarne R.

Metallicities ages and full Galactic orbits have been derived for acomplete kinematically unbiased sample of 14.000 F and G dwarfs in theSolar neighbourhood. The observational data are Strmgren...

Local galactic evolution (2003)

Holmberg, Johan, Nordström, Birgitta, Rosenkilde Jørgensen, Bjarne, Andersen, Johannes

The evolution of the Solar neighbourhood is followed using a unique,magnitude complete and kinematically unbiased sample of 14,000 F, G, andK dwarfs. Metallicity, age, space motion and galactic...

White dwarfs and Galactic dark matter (2003)

Flynn, Chris, Holmberg, Johan, Holopainen, Janne, Swinburne University Of Technology. School Of Biophysical Science And Electrical Engineering. Centre For Astrophysics And Supercomputing

We discuss the recent discovery by Oppenheimer et al. of old, cool white dwarf stars, which may be the first direct detection of Galactic halo dark matter. We argue here that the contribution of more...

White dwarfs and Galactic dark matter (2003)

Flynn, Chris, Holmberg, Johan, Holopainen, Janne

We discuss the recent discovery by Oppenheimer et al. of old, cool white dwarf stars, which may be the first direct detection of Galactic halo dark matter. We argue here that the contribution of more...

White dwarfs and Galactic dark matter (2003)

Flynn, Chris, Holmberg, Johan, Holopainen, Janne

We discuss the recent discovery by Oppenheimer et al. of old, cool white dwarf stars, which may be the first direct detection of Galactic halo dark matter. We argue here that the contribution of more...

White dwarfs and Galactic dark matter (2003)

Flynn, Chris, Holmberg, Johan, Holopainen, Janne

We discuss the recent discovery by Oppenheimer et al. of old, cool white dwarf stars, which may be the first direct detection of Galactic halo dark matter. We argue here that the contribution of more...

White dwarfs and Galactic dark matter (2003)

Flynn, Chris, Holmberg, Johan, Holopainen, Janne

We discuss the recent discovery by Oppenheimer et al. of old, cool white dwarf stars, which may be the first direct detection of Galactic halo dark matter. We argue here that the contribution of more...

White dwarfs and Galactic dark matter (2003)

Flynn, Chris, Holmberg, Johan, Holopainen, Janne

We discuss the recent discovery by Oppenheimer et al. of old, cool white dwarf stars, which may be the first direct detection of Galactic halo dark matter. We argue here that the contribution of more...

White dwarfs and Galactic dark matter (2002)

Flynn, Chris, Holopainen, Janne, Holmberg, Johan

We discuss the recent discovery by Oppenheimer et al (2001) of old, cool white dwarf stars, which may be the first direct detection of Galactic halo dark matter. We argue here that the contribution...

The solar neighbourhood age-metallicity relation - does it exist? (2001)

Feltzing, Sofia, Holmberg, Johan, Hurley, Jarrod R.

We derive stellar ages, from evolutionary tracks, and metallicities, from Stromgren photometry, for a sample of 5828 dwarf and sub-dwarf stars from the Hipparcos Catalogue. This stellar disk sample...

Galactic Structure Revealed by Space Astrometry (2001)

Holmberg, Johan

This work demonstrates how the structure of our Galaxy, the Milky Way, can be unveiled with the use of space astrometry. It consists of two parts, of which the first is a brief introduction to the...

The solar neighbourhood age-metallicity relation : does it exist? (2001)

Feltzing, Sofia, Holmberg, Johan, Hurley, Jarrod R.

We derive stellar ages, from evolutionary tracks, and metallicities, from Stromgren photometry, for a sample of 5828 dwarf and sub-dwarf stars from the Hipparcos Catalogue. This stellar disk sample...

The solar neighbourhood age-metallicity relation : does it exist? (2001)

Feltzing, Sofia, Holmberg, Johan, Hurley, Jarrod R.

We derive stellar ages, from evolutionary tracks, and metallicities, from Stromgren photometry, for a sample of 5828 dwarf and sub-dwarf stars from the Hipparcos Catalogue. This stellar disk sample...

The solar neighbourhood age-metallicity relation : does it exist? (2001)

Feltzing, Sofia, Holmberg, Johan, Hurley, Jarrod R.

We derive stellar ages, from evolutionary tracks, and metallicities, from Stromgren photometry, for a sample of 5828 dwarf and sub-dwarf stars from the Hipparcos Catalogue. This stellar disk sample...

The solar neighbourhood age-metallicity relation : does it exist? (2001)

Feltzing, Sofia, Holmberg, Johan, Hurley, Jarrod R.

We derive stellar ages, from evolutionary tracks, and metallicities, from Stromgren photometry, for a sample of 5828 dwarf and sub-dwarf stars from the Hipparcos Catalogue. This stellar disk sample...

The solar neighbourhood age-metallicity relation : does it exist? (2001)

Feltzing, Sofia, Holmberg, Johan, Hurley, Jarrod R.

We derive stellar ages, from evolutionary tracks, and metallicities, from Stromgren photometry, for a sample of 5828 dwarf and sub-dwarf stars from the Hipparcos Catalogue. This stellar disk sample...

The solar neighbourhood age-metallicity relation : does it exist? (2001)

Feltzing, Sofia, Holmberg, Johan, Hurley, Jarrod R.

We derive stellar ages, from evolutionary tracks, and metallicities, from Stromgren photometry, for a sample of 5828 dwarf and sub-dwarf stars from the Hipparcos Catalogue. This stellar disk sample...

The reality of old moving groups - the case of HR 1614 (2000)

Feltzing, Sofia, Holmberg, Johan

We prove the existence of the old and metal-rich moving group HR1614. This is done using the new Hipparcos parallaxes in combination with metallicities derived from Stromgren photometry, supported by...

The local density of matter mapped by Hipparcos (1998)

Holmberg, Johan, Flynn, Chris

We determine the velocity distribution and space density of a volume complete sample of A and F stars, using parallaxes and proper motions from the Hipparcos satellite. We use these data to solve for...

Ephrin-A2 reverse signaling negatively regulates neural progenitor proliferation and neurogenesis

Holmberg, Johan, Armulik, Annika, Senti, Kirsten-André, Edoff, Karin, Spalding, Kirsty, Momma, Stefan, ...

The number of cells in an organ is regulated by mitogens and trophic factors that impinge on intrinsic determinants of proliferation and apoptosis. We here report the identification of an additional...

Ephrin-A2 reverse signaling negatively regulates neural progenitor proliferation and neurogenesis

Holmberg, Johan, Armulik, Annika, Senti, Kirsten-André, Edoff, Karin, Spalding, Kirsty, Momma, Stefan, ...

The number of cells in an organ is regulated by mitogens and trophic factors that impinge on intrinsic determinants of proliferation and apoptosis. We here report the identification of an additional...

PITX2 Gain-of-Function in Rieger Syndrome Eye Model

Holmberg, Johan, Liu, Chia-Yang, Hjalt, Tord A.

The human autosomal-dominant disorder Axenfeld-Rieger syndrome presents with defects in development of the eyes, teeth, and umbilicus. The eye manifests with iris ruptures, irido-corneal adhesions,...

TOWARDS AN IMPROVED MODEL OF THE GALAXY Johan Holmberg

Chris Flynn Lennart, Johan Holmberg, Chris Flynn, Lennart Lindegren

We use the Hipparcos survey to derive an improved model of the local galactic structure. The availability of parallaxes for all the stars permits direct determination of stellar distributions,...

Astrometric Radial Velocities From Hipparcos

Dainis Dravins, Lennart Lindegren, Søren Madsen, Johan Holmberg

Space astrometry now permits accurate determinations of stellar radial motion, without using spectroscopy. Using Hipparcos data, this is possible for stars in nearby moving clusters, where all stars...