665 citations · 3.9k across the 40 of their papers we have counts for
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Star-forming cores embedded in a massive cold clump: Fragmentation, collapse and energetic outflows
Martin Hennemann, Stephan M. Birkmann, Oliver Krause +4
The fate of massive cold clumps, their internal structure and collapse need to be characterised to understand the initial conditions for the formation of high-mass stars, stellar s…
Tycho Brahe's 1572 supernova as a standard type Ia explosion revealed from its light echo spectrum
Oliver Krause, Masaomi Tanaka, Tomonori Usuda +4
Type Ia supernovae (SNe Ia) are thermonuclear explosions of white dwarf stars in close binary systems. They play an important role as cosmological distance indicators and have led…
The Cassiopeia A Supernova was of Type IIB
Oliver Krause, Stephan M. Birkmann, Tomonori Usuda +4
Cassiopeia A is one of the youngest supernova remnants known in the Milky Way and a unique laboratory for supernova physics. We present an optical spectrum of the Cassiopeia A supe…
An infrared-submillimeter study of star-forming regions selected by the ISOSS 170um survey
M. Hennemann, S. M. Birkmann, O. Krause +1
Using the ISOPHOT Serendipity Survey (ISOSS) at 170um a sample of galactic star-forming regions exhibiting very cold dust temperatures (< 20 K) and high masses (> 100 M_sun) has be…
Constraints on the nature of dust particles by infrared observations
Cs. Kiss, P. Abraham, R. J. Laureijs +2
The far-infrared (FIR) emissivity of dust is an important parameter characterizing the physical properties of the grains. With the availability of stellar databases and far-infrare…
Infrared Echoes near the Supernova Remnant Cassiopeia A
O. Krause, G. H. Rieke, S. M. Birkmann +9
Two images of Cassiopeia A obtained at 24 micrometer with the Spitzer Space Telescope over a one year time interval show moving structures outside the shell of the supernova remnan…