M. Scholz

GSI Helmholtz Centre for Heavy Ion Research

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Thomas Friedrich

GSI Helmholtz Centre for Heavy Ion Research

Marco Durante

Technical University of Darmstadt

Christian P. Karger

German Cancer Research Center

Gerhard Kraft

GSI Helmholtz Centre for Heavy Ion Research

P. R. Wood

Australian National University

Jürgen Debus

Heidelberg University

Peter Peschke

German Cancer Research Center

M. Wittkowski

European Southern Observatory

G. Taucher-Scholz

GSI Helmholtz Centre for Heavy Ion Research

Thilo Elsässer

Siemens Healthcare (Germany)

Cooperative Institutions

Heidelberg University

113

German Cancer Research Center

University Hospital Heidelberg

GSI Helmholtz Centre for Heavy Ion Research

Centre National de la Recherche Scientifique

Max Planck Society

Heidelberger Institut für Radioonkologie

National Center for Tumor Diseases

Technical University of Darmstadt

Observatoire de la Côte d’Azur

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Non-LTE analysis of neutral oxygen lines in A-type stars.

Astronomy and Astrophysics (1977)

B. Baschek M. Scholz E. Sedlmayr

Source

Cite

Citations (3)

On the atmospheric structure and fundamental parameters of red supergiants

Proceedings of the International Astronomical Union (2014)

M. Wittkowski B. Arroyo-Torres J. M. Marcaide F. J. Abellán A. Chiavassa

Abstract We present near-infrared spectro-interferometric studies of red supergiant (RSG) stars using the VLTI/AMBER instrument, which are compared to previously obtained similar observations of AGB stars. Our observations indicate spatially extended atmospheric molecular layers of water vapor and CO, similar as previously observed for Mira stars. Data of VY~CMa indicate that the molecular layers are asymmetric, possibly clumpy. Thanks to the spectro-interferometric capabilities of the VLTI/AMBER instrument, we can isolate continuum bandpasses, estimate fundamental parameters of our sources, locate them in the HR diagram, and compare their positions to recent evolutionary tracks. For the example of VY CMa, this puts it close to evolutionary tracks of initial mass 25-32 M ⊙ . Comparisons of our data to hydrostatic model atmospheres, 3d simulations of convection, and 1d dynamic model atmospheres based on self-excited pulsation models indicate that none of these models can presently explain the observed atmospheric extensions for RSGs. The mechanism that levitates the atmospheres of red supergiant is thus a currently unsolved problem.

Hydrostatic equilibrium

Atmospheric Dynamics

10.1017/s1743921314006930

Cite

Citations (3)

Rapid calculation of biological effects in ion radiotherapy

Physics in Medicine and Biology (2006)

Martina Krämer M. Scholz

We describe a method for fast calculation of biological effects after ion irradiation. It is an alternative derivative of the established local effect model (LEM) and has been integrated into GSI's TRiP98 treatment planning system. We show that deviations from our classic approach for treatment planning are less than 5% for therapeutical doses, but calculational speed can be improved by one to two orders of magnitude. This will allow sophisticated methods of treatment planning for ion irradiation, taking biological effects fully into account.

Biological effect

Relative biological effectiveness

10.1088/0031-9155/51/8/001

Cite

Citations (126)

Kornmarktcenter Bautzen 2012

M. Scholz Tina Preussger

Source

Cite

Citations (0)

COMPARATIVE STUDIES FOR RBE MODELS USED IN CARBON ION THERAPY TREATMENT PLANNING

International Journal of Particle Therapy (2024)

Thomas Friedrich Kaya Hilt Christian Deglow M. Scholz Marco Durante

Carbon fibers

10.1016/j.ijpt.2024.100616

Cite

Citations (0)

The K-band intensity profile of R Leonis probed by VLTI/VINCI

Astronomy and Astrophysics (2005)

D. Fedele M. Wittkowski Francesco Paresce M. Scholz P. R. Wood

We present near-infrared K-band interferometric measurements of the Mira star R Leonis obtained in April 2001 and January 2002 with the VLTI, the commissioning instrument VINCI, and the two test siderostats. These epochs correspond to near-maximum stellar variability phases ~0.08 and ~1.02 (one cycle later), respectively. The April 2001 data cover a range of spatial frequencies (31–35 cycles/arcsecond) within the first lobe of the visibility function. These measurements indicate a center-to-limb intensity variation (CLV) that is clearly different from a uniform disk (UD) intensity profile. We show that these measured visibility values are consistent with predictions from recent self-excited dynamic Mira model atmospheres that include molecular shells close to continuum-forming layers. We derive high-precision Rosseland diameters of mas and mas for the April 2001 and January 2002 data, respectively. Together with literature estimates of the distance and the bolometric flux, these values correspond to linear radii of and , and to effective temperatures of K and K, respectively.

Intensity

Visibility

K band

10.1051/0004-6361:20042013

Cite

Citations (38)

Biodosimetry of heavy-ion induced DNA double-strand breaks in murine tissues

J. Mirsch Andrea B. Maier Sandro Conrad Markus Löbrich M. Scholz

Biodosimetry

Double strand

Source

Cite

Citations (0)

WIRTSCHAFTSINFORMATIK (2008)

Franz Lehner Stephan Wildner M. Scholz

10.3139/9783446417199.008

Cite

Citations (0)

The Genetic Polymorphisms in Leukocyte Immunoglobulin-like Receptor B3 (LILRB3) Gene Are Associated With the Respiratory Diseases in the Population With African American Ancestry

Wei Zhang Zeguo Sun N. Kimura Wenhui Wang Chengguo Wei

10.1164/ajrccm-conference.2024.209.1_meetingabstracts.a3020

Cite

Citations (0)

What causes the large extensions of red supergiant atmospheres?

B. Arroyo-Torres M. Wittkowski A. Chiavassa M. Scholz B. Freytag

Aims. This research has two main goals. First, we present the atmospheric structure and the fundamental parameters of three red supergiants (RSGs), increasing the sample of RSGs observed by near-infrared spectro-interferometry. Additionally, we test possible mechanisms that may explain the large observed atmospheric extensions of RSGs.

10.1051/0004-6361/201425212

Cite

Citations (0)