Results 111 to 120 of about 40,670 (264)

Asteroseismology of beta Cephei and Be type stars

, 2012
The thesis focuses on the asteroseismology of main sequence B-type stars, particularly \(\beta\) Cephei and Be stars. Photometric observations of these stars were analysed in order to detect stellar oscillations.
Goss, Kym Jeanette Frances
core  

The winds of young Solar-type stars in the Pleiades, AB Doradus, Columba and $\beta$ Pictoris

, 2023
Solar-type stars, which shed angular momentum via magnetised stellar winds, enter the main sequence with a wide range of rotational periods $P_\text{rot}$. This initially wide range of rotational periods contracts and has mostly vanished by a stellar age
Salmeron, R., Carter, B.D., Folsom, C P, Evensberget, D., Marsden, S C, Strickert, K. Markus, Folsom, Colin P., Pineda, J S, Driessen, F A, Strickert, K M, Salmeron, Raquel, Kavanagh, Robert D., Salmeron, R, Driessen, Florian A., Kavanagh, R.D., Vidotto, A A, Pineda, J.S., Evensberget, D, Carter, B D, Kavanagh, R D, Driessen, F.A., Strickert, K.M., Vidotto, Aline A., Evensberget, Dag, Vidotto, A.A., Folsom, C.P., Marsden, Stephen C., Carter, Bradley D., Marsden, S.C.   +28 more
core   +1 more source

A Study of Abundance Patterns in the Sextans and Sculptor Dwarf Spheroidal Galaxies

The Astrophysical Journal
In this work, we employ a multicomponent decomposition model to study the Sextans and Sculptor dwarf spheroidal galaxies, which have distinct evolutionary histories.
Shuaishuai Yang, Shichao Zhang, Lu Zhang, Hongjie Li   +3 more
doaj   +1 more source

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

FEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil, Anna Corrà, Annalisa Scapolatiello, Chengxiang Qiu, Gianluca Amadei   +4 more
wiley   +1 more source

Doppler and Zeeman Doppler Imaging of Stars

, 2016
In this chapter we discuss the problem of reconstructing two-dimensional stellar surface maps from the variability of intensity and/or polarisation profiles of spectral lines.
Kochukhov, Oleg,, Oleg Kochukhov
core   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

First Observation of the Complete Rotation Period of the Ultraslowly Rotating Magnetic O Star HD 54879

The Astrophysical Journal
HD 54879 is the most recently discovered magnetic O-type star. Previous studies ruled out a rotation period shorter than 7 yr, implying that HD 54879 is the second most slowly rotating known magnetic O-type star.
C. Erba, C. P. Folsom, A. David-Uraz, G. A. Wade, S. Seadrow, S. Bellotti, L. Fossati, V. Petit, M. E. Shultz   +8 more
doaj   +1 more source

Quantitative spectroscopy of single and multiple OB-type stars

Astronomy & Astrophysics
Aims. The plethora of spectra of OB-type stars in observatory archives and the much larger numbers to come from the WEAVE and 4MOST spectroscopic facilities require efficient, but also accurate and precise methods for (semi)automatic quantitative ...
Aschenbrenner P., Przybilla N.
doaj   +1 more source

The human gut microbiome across the life course

FEBS Letters, EarlyView.
Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero, Basak Bahcivanci, Antonietta Hayhoe, Animesh Acharjee, Ezgi Özkurt   +4 more
wiley   +1 more source

X-Shooting ULLYSES: Massive stars at low metallicity

Astronomy & Astrophysics
Context. Hot massive stars lose mass through radiation-driven winds, producing significant chemical, radiative, and mechanical feedback in the surrounding environment.
Alkousa T., Crowther P. A., Bestenlehner J. M., Sana H., Tramper F., Vink J. S., Najarro F., Sander A. A. C., Bernini-Peron M., Oskinova L., van Loon J. Th., Kuiper R.   +11 more
doaj   +1 more source