Results 31 to 40 of about 2,321,585 (305)

Centaurus A: Hard X-ray and High-Energy Gamma-Ray Light Curve Correlation

Galaxies, 2019
Centaurus A, powered by a 55 million solar mass supermassive black hole, has been intensively monitored in all accessible wavelength ranges of the electromagnetic spectrum.
Isak Delberth Davids, Markus Böttcher, Michael Backes   +2 more
doaj   +1 more source

The shapes of light curves of Mira-type variables

, 2010
Using a sample of 454 mira light curves from the ASAS survey we study the shape of the light variations in this kind of variable stars. Opposite to earlier studies, we choose a general approach to identify any deviation from a sinusoidal light change. We
Barthes, Bowers, Bowers, Feast, Groenewegen, Ita, Le Bertre, Lebzelter, Lockwood, Mennessier, Nowotny, Onaka, Pojmansik, Pojmanski, Pojmanski, Soszynski, Soszynski, Soszynski, Vardya, Vardya, Vardya, Winters, Wood, Wood, Wood   +24 more
core   +1 more source

Speciation Through the Lens of Population Dynamics: A Theoretical Primer on How Small and Large Populations Diverge

Population Ecology, EarlyView.
Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi, Hidaka Kubo, Tokuya Ogawa, Hayate Omura   +3 more
wiley   +1 more source

Modeling the light curve of the transient SCP06F6 [PDF]

, 2009
We consider simple models based on core collapse or pair-formation supernovae to account for the light curve of the transient SCP06F6. A radioactive decay diffusion model provides estimates of the mass of the required radioactive nickel and the ejecta as
Agnoletto, Arnett, Barbary, Bufano, Dolphin, Downes, Draine, Emmanouil Chatzopoulos, Gaensicke, Gezari, Gilliland, Harkness, J. Craig Wheeler, J. Vinko, Kotak, Kotak, Miller, Ofek, Quimby, Quimby, Quimby, Quimby, Smith, Smith, Smith, Smith, Smith, Smith, Soker, Tominaga, Yuan   +30 more
core   +2 more sources

Exploring lipid diversity and minimalism to define membrane requirements for synthetic cells

FEBS Letters, EarlyView.
Designing the lipid membrane of synthetic cells is a complex task, in which its various roles (among them solute transport, membrane protein support, and self‐replication) should all be integrated. In this review, we report the latest top‐down and bottom‐up advances and discuss compatibility and complexity issues of current engineering approaches ...
Sergiy Gan, Victoria Scarpelli, Marten Exterkate   +2 more
wiley   +1 more source

Polarization and light curve variability: the "patchy shell" model

, 2003
Recent advances in early detection and detailed monitoring of GRB afterglows have revealed variability in some afterglow light curves. One of the leading models for this behavior is the patchy shell model.
Ehud Nakar, Pandey S. B., Uemura M., Yonatan Oren   +3 more
core   +1 more source

Microbial exopolysaccharide production by polyextremophiles in the adaptation to multiple extremes

FEBS Letters, EarlyView.
Polyextremophiles are microorganisms that endure multiple extreme conditions by various adaptation strategies that also include the production of exopolysaccharides (EPSs). This review provides an integrated perspective on EPS biosynthesis, function, and regulation in these organisms, emphasizing their critical role in survival and highlighting their ...
Tracey M Gloster, Ebru Toksoy Öner
wiley   +1 more source

Photometric AGN reverberation mapping - an efficient tool for BLR sizes, black hole masses and host-subtracted AGN luminosities

, 2011
Photometric reverberation mapping employs a wide bandpass to measure the AGN continuum variations and a suitable band, usually a narrow band (NB), to trace the echo of an emission line in the broad line region (BLR).
Bennert, Bentz, Bentz, Bentz, Blandford, C. Westhues, Cherepashchuk, Choloniewski, Denney, Denney, Doroshenko, Doroshenko, Edelson, Elvis, Elvis, F. Pozo Nuñez, Horne, Horne, Kaspi, Kaspi, Kaspi, Kollatschny, Kollatschny, Kollatschny, Koratkar, Korista, Landolt, M. Haas, M. Murphy, M. Ramolla, McAlary, McLure, Netzer, Netzer, Peterson, Peterson, Peterson, R. Chini, R. Watermann, Riess, Sakata, Schlegel, V. Hoffmeister, Vestergaard, Wandel, Welsh, Winkler, Winkler, Woo   +48 more
core   +1 more source

Mid-Infrared Variability of protostars in IC 1396A [PDF]

, 2009
We have used Spitzer/IRAC to conduct a photometric monitoring program of the IC1396A dark globule in order to study the mid-IR (3.6 - 8 micron) variability of the heavily embedded Young Stellar Objects (YSOs) present in that area.
Allen, B. A. Whitney, Bouvier, Bouvier, Byrne, Carpenter, Castelli, Charbonneau, Contreras, Cutri, D'Alessio, D. Barrado y Navascués, D. R. Ardila, Deming, I. Song, Ida, J. R. Stauffer, L. Hartmann, L. Rebull, Lada, M. Morales-Calderón, Marconi, Megeath, Morales-Calderón, N. Calvet, Reach, Robitaille, Sicilia-Aguilar, Siess, T. Y. Brooke, Whitney, Whitney, Wood   +32 more
core   +3 more sources

Imeglimin attenuates liver fibrosis by inhibiting vesicular ATP release from hepatic stellate cells

FEBS Letters, EarlyView.
Imeglimin, at clinically relevant concentrations, inhibits vesicular ATP accumulation and release from hepatic stellate cells, thereby attenuating purinergic signaling and reducing fibrogenic activation. This mechanism reveals a newly identified antifibrotic action of imeglimin beyond glycemic control.
Seiji Nomura, Lixiang Wang, Nao Hasuzawa, Ayako Nagayama, Sawako Moriyama, Kenji Ashida, Yoshinori Moriyama, Masatoshi Nomura, Ken Yamamoto   +8 more
wiley   +1 more source