Results 111 to 120 of about 4,355,728 (290)

Wolf-Rayet formation through L/M-dependent superwinds

Astronomy & Astrophysics
Mass loss in red supergiants (RSGs) is poorly understood and stellar evolution models rely on empirical prescriptions. In recent years, new superwind mass-loss ideas – including an L/M dependence – have been proposed, unlike traditional RSG wind recipes ...
McKeown Aisling, Furey Ciarán, Sabhahit Gautham N., Vink Jorick S.   +3 more
doaj   +1 more source

Spectral Observations of Stars in Late Stages of Stellar Evolution

, 2002
10 pages, 5 PostScript figures, seminar given at the EuroWinterSchool "Observing with the VLTI", Feb 3-8 2002, Les Houches (France), EAS Publication Series, in press; see also http://www.mpifr-bonn.mpg.de/div/ir-interferometry/publications ...
Bloecker, T., Hofmann, K. -H., Weigelt, G.   +2 more
openaire   +2 more sources

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

FEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

The EREBOS project -- Investigating the effect of substellar and low-mass stellar companions on late stellar evolution

, 2019
Eclipsing post-common envelope binaries are highly important for resolving the poorly understood, very short-lived common envelope phase. Most hot subdwarfs (sdO/Bs) are the bare He-burning cores of red giants which have lost almost all of their hydrogen envelopes.
Schaffenroth, V., Barlow, B. N., Geier, S., Vučković, M., Kilkenny, D., Wolz, M., Kupfer, T., Heber, U., Drechsel, H., Kimeswenger, S., Marsh, T., Wolf, M., Pelisoli, I., Freudenthal, J., Dreizler, S., Kreuzer, S., Ziegerer, E.   +16 more
openaire   +3 more sources

Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers

FEBS Letters, EarlyView.
Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui, Agnes Banreti, Armelle L. Ernst, Guillaume Leseigneur, Uwe J. Meierhenrich   +4 more
wiley   +1 more source

Characterising the post-red supergiant binary system AFGL 4106 and its complex nebula with SPHERE/VLT

Astronomy & Astrophysics
Context. Mass loss in evolved massive stars plays a critical role in shaping their circumstellar environments and enriching the interstellar medium. In binary systems, stellar interactions can further complicate this process, affecting stellar evolution,
Tomassini G., Lagadec E., El Mellah I., Oudmaijer R. D., Chiavassa A., N’Diaye M., de Laverny P., Nardetto N., Matter A.   +8 more
doaj   +1 more source

Prospecting the protein design landscape

FEBS Letters, EarlyView.
This review outlines the current state of various protein design approaches. We discuss the current possibilities enabled by recently released tools, highlight future avenues to pursue in protein design, and underscore the crucial role of key databases and resources for successful protein design workflows.
Jakob R. Riccabona, Katharina T. Stonig, Jens Meiler, Clara T. Schoeder, Monica L. Fernández‐Quintero   +4 more
wiley   +1 more source

Tracing Galaxy Evolution in the Nearby Universe: The Role of Dark Matter

The Astronomical Journal
Using a sample of ∼126,000 late-type galaxies (LTGs) from the Sloan Digital Sky Survey, we analyzed stellar mass as a function of the dynamical mass. Stellar masses are estimated using eight stellar population synthesis (SPS) models with constant initial
A. Nigoche-Netro, P. Lagos, R. J. Diaz, E. de la Fuente, M. P. Agüero, A. Ruelas-Mayorga, S. N. Kemp, R. A. Marquez-Lugo, R. Ibarra-Nuño   +8 more
doaj   +1 more source

Cosmic environment as the primary driver of dwarf satellite statistics

Astronomy & Astrophysics
Context. Satellite dwarf galaxies provide key constraints on galaxy formation and evolution, since their abundance and spatial distribution reflect both the host properties and the large-scale environment. Aims.
Tavasoli S., Ghafour P.
doaj   +1 more source

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

FEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil, Jeffrey A. Hawkes, Cecilia Blikstad, Pia Lindberg   +3 more
wiley   +1 more source