A complete data base of kinematical data for early-type galaxies

1990 ◽  
Vol 13 (2) ◽  
pp. 525-528
Author(s):  
G. Busarello ◽  
F. Di Martino ◽  
G. Longo
Keyword(s):  
Data Base ◽  
Complete Data ◽  
Early Type ◽  
Kinematical Data

scholarly journals Kinematical data on early-type galaxies. I.

1997 ◽  
Vol 122 (3) ◽  
pp. 521-528 ◽  
Author(s):  
F. Simien ◽  
Ph. Prugniel
Keyword(s):  
Early Type ◽  
Kinematical Data

scholarly journals Kinematical data on early-type galaxies. VI.

2002 ◽  
Vol 384 (2) ◽  
pp. 371-382 ◽  
Author(s):  
F. Simien ◽  
Ph. Prugniel
Keyword(s):  
Early Type ◽  
Kinematical Data

scholarly journals Massive Elliptical Galaxies: BH Scouring or a Bottom-Heavy IMF?

2014 ◽  
Vol 10 (S311) ◽  
pp. 36-39
Author(s):  
Jens Thomas ◽  
Roberto Saglia ◽  
Ralf Bender ◽  
Peter Erwin ◽  
Maximilian Fabricius
Keyword(s):  
Dark Matter ◽  
Power Law ◽  
Milky Way ◽  
Elliptical Galaxies ◽  
Stellar Mass ◽  
Initial Mass Function ◽  
Early Type ◽  
Stellar Masses ◽  
Kinematical Data ◽  
The Imf

AbstractWe present indirect constraints on the stellar initial-mass-function (IMF) in nine massive elliptical galaxies with σ ≈ 300 km/s, via a comparison of dynamical and stellar-population based stellar masses. We use adaptive-optics assisted, high resolution kinematical data from the SINFONI Search for Supermassive Black Holes that allow us to constrain the dynamical stellar mass-to-light ratio in the very centre of each galaxy. Hence we measure the IMF in a galaxy region where the stellar mass dominates over dark matter, minimising any potential degeneracy between the two mass components. In six of our galaxies – those which have depleted stellar cores – we find an IMF consistent with the one measured in the Milky-Way via direct star counts. The three remaining, power-law galaxies have instead stellar masses about a factor of two times larger than expected from a Milky-Way type IMF, indicating either a more bottom-heavy IMF (like, e.g., the Salpeter IMF) or a dark-matter distribution that is degenerate with the stellar mass down to the very centres of these galaxies. The bottom-light IMF in our core galaxies is surprising in view of previous studies that suggested a systematic IMF variation where early-type galaxies with σ ≈ 300 km/s have a Salpeter or even more dwarf-dominated IMF. Core galaxies are particularly important since their unique central orbital structure offers an independent crosscheck for the dynamical models. Our models with a bottom-light IMF are consistent with the distribution of orbits predicted by SMBH-binary core-formation models. This indicates that spatially well resolved central kinematical data are important for determining unbiased dynamical stellar mass-to-light ratios. Our results imply either that the IMF in massive galaxies varies over a wider range than previously anticipated, and is not the same in core and power-law ellipticals, or else that there are systematic variations in the distribution of dark matter among massive early-type galaxies.

The Nazi Vote: A National Ecological Study

1982 ◽  
Vol 76 (2) ◽  
pp. 285-302 ◽  
Author(s):  
Courtney Brown
Keyword(s):  
Data Base ◽  
Weimar Republic ◽  
Ecological Study ◽  
Complete Data ◽  
Major Contributor ◽  
Limited Data ◽  
Data Set ◽  
Petty Bourgeoisie ◽  
Levels Of Support

Two models of voting are often used to explain the Nazi vote in the Weimar Republic. The first model states that the Nazis' electoral successes resulted from Protestant petty bourgeois and peasant support for fascism. The second model argues that the Nazis gained the bulk of their support from newly mobilized voters. Previous analyses of these models are plagued with serious problems due to their limited data base. This study reassesses these models with the use of an unusually complete data set for all of Germany and concludes that much of the previous work examining the Nazi vote wrongly identifies the Protestant petty bourgeoisie as the major contributor to the Nazi vote. The Nazis received important levels of support from Protestant peasants, new voters, and Catholic petty bourgeoisie.

scholarly journals Kinematical data on early-type galaxies. IV.

1998 ◽  
Vol 131 (2) ◽  
pp. 287-290 ◽  
Author(s):  
F. Simien ◽  
Ph. Prugniel
Keyword(s):  
Early Type ◽  
Kinematical Data

scholarly journals Kinematical data on early-type galaxies. III.

1997 ◽  
Vol 126 (3) ◽  
pp. 519-523 ◽  
Author(s):  
F. Simien ◽  
Ph. Prugniel
Keyword(s):  
Early Type ◽  
Kinematical Data

scholarly journals Kinematical data on early-type galaxies. V.

2000 ◽  
Vol 145 (2) ◽  
pp. 263-267 ◽  
Author(s):  
F. Simien ◽  
Ph. Prugniel
Keyword(s):  
Early Type ◽  
Kinematical Data

Data Rescue and Homogenization of Historic Mass Balance Measurements on Swiss Glaciers

2021 ◽  
Author(s):  
Lea Geibel ◽  
Claudia Kurzböck ◽  
Matthias Huss ◽  
Andreas Bauder
Keyword(s):  
Time Series ◽  
Mass Balance ◽  
Data Base ◽  
Complete Data ◽  
Point Mass ◽  
Data Series ◽  
The Past ◽  
Accuracy Of Measurements ◽  
Diverse Field ◽  
Density Values

<p>Long-term glacier monitoring in Switzerland has resulted in some of the longest and most complete data series globally. Point mass balance observations, starting in the 19th century, are the backbone of the monitoring as they represent the raw and original data demonstrating the response of surface accumulation and melt to changes in climate forcing. Some of these time series on Swiss glaciers provide over 100 years of continuous measurements.</p><p>In the past, the variety of sources of historic measurements has only been partially investigated and never been completely and systematically processed and documented. Therefore, a new format for a point mass balance database was developed that allows full traceability of all measurements back to their original source as well as indicators for the quality of the data and corresponding measuring uncertainties. All previously included data sources were transferred into the new data base format and the original sources were re-assessed to validate or correct the entries and identify metadata. Furthermore, newly investigated measurements were added to the data base. The sources of data include an extremely diverse field from over 140 years of measurements such as published reports or studies, unpublished documents from field projects, field notes, digital sources as well as metaknowledge of the observers. Currently, data series with complete metadata for about 60 individual glaciers are available, corresponding to almost 60.000 point observations, one third of which are newly added.</p><p>In addition to extending the data base, this project also allowed us to systematically and homogenously fill in missing information such as estimates of the surface elevation of the measurement points and snow/firn density.  In the past, these density values often had to be assumed without actual measurements but those assumptions could vary up to 20% within different projects and assumptions were rarely flagged as such. The newly added metadata now allows performing an analysis of all actually measured density values and a homogenous interpolation of missing values across all times series based on known values. Furthermore, a system to estimate uncertainties of the mass balance measurements based on the metadata was developed as the accuracy of measurements between different measuring techniques and projects with very differing scientific objectives over a time frame of 140 years can vary significantly and therefore needs to be assessed. This quality-checked and complete data base now permits the re-analysis of consistent time series of glacier-wide mass balance allowing further interpretation of the climate change impacts on Swiss glaciers.</p>

scholarly journals Kinematical data on early-type galaxies. II.

1997 ◽  
Vol 126 (1) ◽  
pp. 15-19 ◽  
Author(s):  
F. Simien ◽  
Ph. Prugniel
Keyword(s):  
Early Type ◽  
Kinematical Data

Some results of the Barbier-Chalonge-Divan system of stellar classification

1966 ◽  
Vol 24 ◽  
pp. 77-90 ◽  
Author(s):  
D. Chalonge
Keyword(s):  
Early Type ◽  
Parameter System ◽  
Early Type Stars ◽  
Two Parameter

Several years ago a three-parameter system of stellar classification has been proposed (1, 2), for the early-type stars (O-G): it was an improvement on the two-parameter system described by Barbier and Chalonge (3).

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