Veranstaltungskalender

Putting Hubble Constant Measurements to the Test using High-precision Observations of classical Cepheids

Lecture in English Language

Relieving the Hubble tension with primordial magnetic fields

The standard cosmological model determined from the accurate cosmic microwave background measurements made by the Planck satellite implies a value of the Hubble constant $H_0$ that is 4.2 standard deviations lower than the one determined from Type Ia supernovae. The Planck best fit model also predicts higher values of the matter density...

Adaptative Learning in Astronomy

Talk in English language

Ringvorlesung - Referent:
Dr. David Walker
(Förderverein Hamburger Sternwarte)

Sterne mittlerer Masse beenden ihr Leben als Neutronensterne. Die Materie, aus der sie bestehen, gehört wohl zu den exotischsten Formen, die uns bekannt sind. Diese Sterne sind flüssig, und obwohl freie Neutronen nach etwa einer Viertelstunde zerfallen, gelingt es den Neutronensternen, eben diesen Zerfall zu verhindern...

The cycle of interstellar matter in the Milky Way as revealed by The HI/OH/Recombination-line (THOR) survey

The past decade has witnessed a large number of Galactic plane surveys at angular resolutions below 20 arcseconds. However, no comparable high-resolution survey existed at long radio wavelengths, around 21 cm in line and continuum emission. We remedied this situation by studying the...

Stochastic Effects on Inferred Metallicities of H II regions

Talk in English Language

Early High-Mass Star Formation: A comprehensive Atlas with ALMA and SOFIA

High–mass stars are cosmic engines known to dominate the energetics in the Milky Way and other galaxies. However, they are very rare and their formation is still not well understood. High-mass, cold, dense clouds are the nurseries of high-mass stars. I will show how high-mass cloud studies have started to reveal the initial...

First simulations of the impact of radiogalaxies on the budget of magnetic fields and relativistic electrons in large-scale structures

Talk in English language.

Ringvorlesung - Referent:
PD Dr. Wolfram Schmidt
(Hamburger Sternwarte, Universität Hamburg)

Galaxien sind nicht gleichmäßig im Universum verteilt, sondern konzentrieren sich in gewaltigen Haufen oder kleineren Gruppen. Innerhalb dieser Ansammlungen kommt es über kosmische Zeiträume hinweg besonders bei Spiralgalaxien zu nahen Vorbeiflügen oder sogar zu Zusammenstößen und Verschmelzungen zu neuen...

Precision measurements of large-scale structure challenge the standard model of cosmology

Talk in English Language