Results 41 to 50 of about 15,412 (318)

Be Stars: Rapidly Rotating Pulsators

, 2012
I will show that Be stars are, without exception, a class of rapidly rotating stars, which are in the majority of cases pulsating stars as well, while none of them does possess a large scale (i.e.
A. Domiciano de Souza, A. Meilland, A.C. Carciofi, C. Martayan, C. Neiner, D. Baade, J. Silvester, J.M. Porter, M. Maintz, R.H.D. Townsend, R.S. Schnerr, R.V. Yudin, S. Bagnulo, S. Hubrig, S. Hubrig, S. Štefl, S. Štefl, S.R. Cranmer, T. Rivinius, T. Rivinius, T. Rivinius, T. Rivinius, T. Rivinius, T. Semaan, Y. Frémat   +24 more
core   +1 more source

Function‐driven design of a surrogate interleukin‐2 receptor ligand

FEBS Letters, EarlyView.
Interleukin (IL)‐2 signaling can be achieved and precisely fine‐tuned through the affinity, distance, and orientation of the heterodimeric receptors with their ligands. We designed a biased IL‐2 surrogate ligand that selectively promotes effector T and natural killer cell activation and differentiation. Interleukin (IL) receptors play a pivotal role in
Ziwei Tang, Zelin Cheng, Teng Li, Fulian Wang, Liangminghui Zhang, Xiuxiu He, Lili Liu, Wei Wang, Aibin Liang, Guang Yang   +9 more
wiley   +1 more source

Multipopulation aftereffects on the color-magnitude diagram and Cepheid variables of young stellar systems

, 2013
Context: The evidence of a multipopulation scenario in Galactic globular clusters raises several questions about the formation and evolution of the two (or more) generations of stars.
Brocato, E., Carini, R., Marconi, M., Raimondo, G.   +3 more
core   +1 more source

Long secondary periods in variable red giants [PDF]

, 2009
‘The definitive version is available at www3.interscience.wiley.com '. Copyright Royal Astronomical Society. DOI: 10.1111/j.1365-2966.2009.15401.xWe present a study of a sample of Large Magellanic Cloud red giants exhibiting Long Secondary Periods (LSPs).
Cioni, M-R.L., Nicholls, C.P., Soszynski, I., Wood, P.R.   +3 more
core   +2 more sources

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Tipsy pulsation of classical Cepheids – lessons from space photometry

EPJ Web of Conferences, 2015
Space photometric data of the Kepler Cepheid, V1154 Cygni, and those of SZ Tauri (MOST photometry) indicate that classical Cepheids are not strictly regular pulsators.
Szabados L., Evans N. R., Szabó R., Derekas A., Cameron A.   +4 more
doaj   +1 more source

Left Ringing: Betelgeuse Illuminates the Connection between Convective Outbursts, Mode Switching, and Mass Ejection in Red Supergiants

The Astrophysical Journal, 2023
Betelgeuse, the nearest red supergiant, dimmed to an unprecedented level in early 2020. The star emerged from this “Great Dimming” episode with its typical, roughly 400 days pulsation cycle halved, and a new dominant period of around 200 days.
Morgan MacLeod, Andrea Antoni, Caroline D. Huang, Andrea Dupree, Abraham Loeb   +4 more
doaj   +1 more source

Dust, pulsation, chromospheres and their role in driving mass loss from red giants in Galactic globular clusters

, 2007
Context: Mass loss from red giants in old globular clusters affects the horizontal branch (HB) morphology and post-HB stellar evolution including the production of ultraviolet-bright stars, dredge up of nucleosynthesis products and replenishment of the ...
Asida, Aurière, Baron, Bates, Boyer, Cacciari, Cahn, Cioni, Cioni, Clement, Cohen, Deutsch, Dupree, Dupree, Dupree, Evans, Falceta-Gonçalves, Feast, Fluks, Fox, Frogel, Frogel, Fusi-Pecci, Gebhardt, Gratton, Gratton, Hagen, Hagen, Harris, Hartmann, Hauschildt, Hauschildt, Houdashelt, I. McDonald, Ibata, Ita, J. Th. van Loon, Judge, Kurucz, Lebzelter, Lebzelter, Lebzelter, Lebzelter, Lebzelter, Levesque, Lloyd Evans, Lloyd Evans, Lloyd Evans, Mauas, McLaughlin, Menzel, Moehler, Montegriffo, Nieuwenhuijzen, Norris, Norris, Origlia, Origlia, Pancino, Paturel, Pickles, Pijpers, Ramdani, Reimers, Rood, Rosenberg, Schröder, Schröder, Sollima, Straniero, Thomas, Valenti, van Loon, van Loon, van Loon, van Loon, Wood, Wood   +77 more
core   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Beat Cepheids as Probes of Stellar and Galactic Metallicity [PDF]

, 2006
The mere location of a Beat Cepheid model in a Period Ratio vs. Period diagram (Petersen diagram) puts very tight constraints on its metallicity Z. The Beat Cepheid Peterson diagrams are revisited with linear nonadiabatic turbulent convective models, and
Alibert Y., Andrievsky S. M., Antonello E., Beaulieu J. P., Christensen-Dalsgaard J., J. Robert Buchler, Kovacs G., Petersen J. O., Robert Szabo, Soszynski I., Udalski A., Vilchez J. M., Yecko P. A.   +12 more
core   +2 more sources