Results 101 to 110 of about 207,702 (293)

Molecules in stellar atmospheres

, 1998
The effects of molecules on model stellar atmospheres are briefly reviewed. Molecular diagnostics of stellar fundamental parameters and of atmospheric structure are discussed, and the presently emerging "ISO picture" of the outer regions of stars is ...
Gustafsson, Bengt,
core  

Directional time-distance probing of model sunspot atmospheres [PDF]

, 2015
A crucial feature not widely accounted for in local helioseismology is that surface magnetic regions actually open a window from the interior into the solar atmosphere, and that the seismic waves leak through this window, reflect high in the atmosphere ...
Przybylski, Damien, Shelyag, Sergiy, Moradi, Hamed, Cally, Paul S.   +3 more
core   +1 more source

Observations of the Halo Star HD 177566

The Astrophysical Journal
We have analyzed archival far-ultraviolet (FUV) and optical spectra of the hot halo star HD 177566. The star has an effective temperature T _eff = 33,000 ± 1000 K, surface gravity $\mathrm{log}g=3.79\pm 0.11$ , and helium abundance $\mathrm{log}N({\rm{He}
William V. Dixon, Pierre Chayer
doaj   +1 more source

Dose‐dependent hepatotoxicity of hydrogen peroxide in HepG2 cells and its modulation by CYP450 induction

FEBS Open Bio, EarlyView.
NMR metabolomics revealed concentration‐dependent metabolic perturbations in HepG2 cells exposed to H2O2. Rifampicin pretreatment enhanced metabolic competence, attenuated toxin‐induced alterations and produced metabolite profiles more consistent with human liver physiology, supporting the use of CYP450‐induced HepG2 models for improved in vitro ...
Maren Jinks, Garth L. Maker, Emily C. Davies, Berin A. Boughton, Samantha Lodge   +4 more
wiley   +1 more source

Stellar population gradients in galaxy discs from the CALIFA survey : the influence of bars [PDF]

, 2014
We acknowledge financial support from the research projects under grants AYA2010-21887-C04-03, AYA2010-21322-C03-03 and AYA2010-15081 by the Spanish Ministerio de Ciencia e Innovación.While studies of gas-phase metallicity gradients in disc galaxies are ...
Wisotzki, L., S. Zibetti, Márquez, I., D. Mast, Papaderos, P., R. García Benito, Rosales-Ortega, F.F., Sánchez, S. F., I. Pérez, Sánchez, S.F., J. Falcón-Barroso, Ruiz Lara, T., P. Sánchez-Blázquez, R. Cid Fernandes, L. Wisotzki, G. van de Ven, de Lorenzo Cáceres, A., P. Papaderos, C. Catalán-Torrecilla, M. Mollá, González Delgado, R., Mendoza, M. A., Aguerri, J.A.L., F. F. Rosales-Ortega, Mendez Abreu, Jairo, Ruiz-Lara, T., Cid Fernandes, R., A. de Lorenzo-Caceres, J. Méndez-Abreu, Zibetti, S., T. Ruiz-Lara, Mendoza, M.A., Iglesias Paramo, Jorge, B. Husemann, Sánchez Blázquez, Patricia, Falcón Barroso, J., Bland-Hawthorn, J., M. A. Mendoza, B. Jungwiert, Catalán Torrecilla, Cristina, Mollá, M., A. Galazzi, C. J. Walcher, A. Gil de Paz, Rosales Ortega, F. F., Mast, D., Marino, Raffaella Anna, Husemann, B., De Amorim, A., J. A. L. Aguerri, Aguerri, J. A. L., Gil De Paz, Armando, Marino, R.A., J. Bland-Hawthorn, A. de Amorim, Pérez, I., R. A. Marino, Walcher, C. J., Méndez Abreu, J., I. Márquez, Walcher, C.J., Galazzi, A., Iglesias-Páramo, J., Jungwiert, B., S. F. Sánchez, R. González Delgado, De Lorenzo-Caceres Rodriguez, Adriana, Catalán-Torrecilla, C., Gil De Paz, A., Van De Ven, G., Falcón-Barroso, J., García Benito, R., Sánchez-Blázquez, P., Jorge Iglesias-Páramo   +73 more
core   +1 more source

Impact of stellar spots on the high-resolution transmission spectra of a giant planet around a Sun-like star

Astronomy & Astrophysics
Context. Transmission spectroscopy has enabled the analysis of exoplanet atmospheres. However, a major challenge in this field is the “noise” from host stars, caused by stellar activity such as dark spots and bright plages.
Lucero Jennifer P., Demangeon O. D. S., Cristo E., Dethier W., Santos N. C.   +4 more
doaj   +1 more source

Symmetric Atom–Atom and Ion–Atom Processes in Stellar Atmospheres

Atoms, 2017
We present the results of the influence of two groups of collisional processes (atom–atom and ion–atom) on the optical and kinetic properties of weakly ionized stellar atmospheres layers.
Vladimir A. Srećković, Ljubinko M. Ignjatović, Milan S. Dimitrijević   +2 more
doaj   +1 more source

Pressure in Stellar Atmospheres [PDF]

Nature, 1911
WITHIN the last fifteen years the spectroscopic equipment applied to the study of both laboratory and celestial investigation has been very materially modified both in dispersive power and design. In the early nineties there were very few of the 21.5-feet Rowland concave grating spectrographs in regular commission for terrestrial research, and it is ...
openaire   +1 more source

ATZ‐1 promotes DNA replication efficiency to maintain normal meiotic function

FEBS Open Bio, EarlyView.
Absence of ATZ‐1 interferes with meiotic DNA replication and cell cycle function via CHK‐1. This causes downstream defects associated with DNA damage and genomic integrity. Taken together, this study suggests that ATZ‐1 influences DNA replication efficiency and cell cycle function to maintain normal meiotic function.
Taylin E. Gourley, Luke W. Molesworth, Nethma H. Waduge, Fahimeh Eskandari, Peter R. Boag, Gregory M. Davis   +5 more
wiley   +1 more source

Spectroscopic study of stellar atmospheres. [PDF]

, 2023
Precise atmospheric parameters and the chemical composition of stars are important factors for studying stars, i. e. for collecting information on stellar classes and spectral types.
Jasaitė, Emilė,
core