TY  - JOUR
A1  - Keles, Engin
A1  - Kitzmann, Daniel
A1  - Mallonn, Matthias
A1  - Alexoudi, Xanthippi
A1  - Fossati, Luca
A1  - Pino, Lorenzo
A1  - Seidel, Julia Victoria
A1  - Caroll, Thorsten A.
A1  - Steffen, M.
A1  - Ilyin, Ilya
A1  - Poppenhäger, Katja
A1  - Strassmeier, Klaus G.
A1  - von Essen, Carolina
A1  - Nascimbeni, Valerio
A1  - Turner, Jake D.
T1  - Probing the atmosphere of HD189733b with the Na i and K i lines
JF  - Monthly Notices of the Royal Astronomical Society
N2  - High spectral resolution transmission spectroscopy is a powerful tool to characterize exoplanet atmospheres. Especially for hot Jupiters, this technique is highly relevant, due to their high-altitude absorption, e.g. from resonant sodium (Na i) and potassium (K i) lines. We resolve the atmospheric K i absorption on HD189733b with the aim to compare the resolved K i line and previously obtained high-resolution Na i-D line observations with synthetic transmission spectra. The line profiles suggest atmospheric processes leading to a line broadening of the order of ∼10 km/s for the Na i-D lines and only a few km/s for the K i line. The investigation hints that either the atmosphere of HD189733b lacks a significant amount of K i or the alkali lines probe different atmospheric regions with different temperature, which could explain the differences we see in the resolved absorption lines.
Y1  - 2020
U6  - https://doi.org/10.1093/mnras/staa2435
VL  - 498
IS  - 1
SP  - 1033
PB  - Oxford Univ. Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Pinkernelle, Josephine
A1  - Abraham, Andreas
A1  - Seidel, Katja
A1  - Braun, Katharina
T1  - Paternal deprivation induces dendritic and synaptic changes and hemispheric asymmetry of pyramidal neurons in the somatosensory cortex
N2  - Similar to maternal care, paternal care is a source of neonatal sensory stimulation, which in primates and rodents has been shown to be essential for developing structure and function of sensory cortices. The aim of our study in the biparental rodent Octodon degus was to assess the impact of paternal deprivation on dendritic and synaptic development in the somatosensory cortex. We (i) quantified the amount of paternal care in relation to total parental investment and (ii) compared dendritic and synaptic development of pyramidal neurons in the somatosensory cortex of animals raised by a single mother or by both parents. On the behavioral level we show that paternal care comprises 37% of total parent-offspring interactions, and that the somatosensory stimulation provided by the fathers primarily consists of huddling, licking/grooming, and playing. On the morphological level we found that, compared with offspring raised by both parents (mother and father), the father-deprived animals displayed significantly reduced spine numbers on the basal dendrites of pyramidal neurons. Furthermore, paternal deprivation induces hemispheric asymmetry of the dendritic morphology of somatosensory pyramidal neurons. Father-deprived animals show shorter and less complex basal dendrites in the left somatosensory cortex compared with the right hemisphere. These findings indicate that paternal deprivation results in delayed or retarded dendritic and synaptic development of somatosensory circuits.
Y1  - 2009
UR  - http://www3.interscience.wiley.com/cgi-bin/jhome/114030483
U6  - https://doi.org/10.1002/Dneu.20726
SN  - 1932-8451
ER  -