Results 111 to 120 of about 29,336 (265)

Non-radial oscillations in M-giant semi-regular variables: Stellar models and Kepler observations

, 2014
The success of asteroseismology relies heavily on our ability to identify the frequency patterns of stellar oscillation modes. For stars like the Sun this is relatively easy because the mode frequencies follow a regular pattern described by a well ...
Bedding, T. R., Bellamy, B., Christensen-Dalsgaard, J., Compton, D., Garcia, R. A., Kiss, L. L., Kjeldsen, H., Mathur, S., Stello, D.   +8 more
core   +1 more source

Introduction to Asymptotic Giant Branch Stars

, 2016
A brief introduction on the main characteristics of the asymptotic giant branch stars (briefly: AGB) is presented. We describe a link to observations and outline basic features of theoretical modeling of these important evolutionary phases of stars.
M. Eid
semanticscholar   +1 more source

Surfing the T Wave: A Primer on ECG T Wave Morphologies Encountered in Clinical Trials and Impact on the QT Interval and Patient Safety

Clinical and Translational Science, Volume 18, Issue 3, March 2025.
ABSTRACT Electrocardiogram (ECG) interpretation and measurement is an essential aspect of patient safety and pharmacovigilance in clinical trials. Changes in the T wave segment of an ECG can provide both diagnostic and prognostic information and may be affected by a variety of intrinsic and extrinsic factors related to drug administration.
Robert M. Lester, Sabina Paglialunga
wiley   +1 more source

[O/Fe] Estimates for Carbon-Enhanced Metal-Poor Stars from Near-IR Spectroscopy

, 2011
We report on oxygen abundances determined from medium-resolution near-IR spectroscopy for a sample of 57 carbon-enhanced metal-poor (CEMP) stars selected from the Hamburg/ESO survey.
Alonso, Aoki, Beers, Beers, Bertrand Plez, Catherine R. Kennedy, Cohen, Collet, Cristallo, Denissenkov, Denissenkov, Falk Herwig, Frebel, Herwig, Herwig, Herwig, Ito, Johnson, Karakas, Kurucz, Lucatello, Lugaro, Marsteller, Marsteller, Meléndez, Meynet, Norbert Christlieb, Norris, Placco, Rossi, Schuler, Siess, Silvia Rossi, Skrutskie, Thirupathi Sivarani, Timothy C. Beers, Tominaga, Umeda, Vinicius M. Placco, Wasserburg, Woodward, Young Sun Lee   +41 more
core   +1 more source

Resolving Stellar Populations outside the Local Group: MAD observations of UKS2323-326 [PDF]

, 2008
We present a study aimed at deriving constraints on star formation at intermediate ages from the evolved stellar populations in the dwarf irregular galaxy UKS2323-326.
A. Baruffolo, A. Moretti, Bouy, Buyle, C. Arcidiacono, Da Costa, E. Diolaiti, E. Marchetti, E. V. Held, Girardi, Gullieuszik, Gullieuszik, Holtzman, J. Farinato, J. Kolb, Jackson, Kaisin, Karachentsev, L. Greggio, Lee, M. Gullieuszik, M. Lombini, Marchetti, Menzies, Miller, P. Bagnara, R. Brast, R. Donaldson, R. Falomo, R. Ragazzoni, Ragazzoni, Ragazzoni, Ragazzoni, S. Tordo, Saviane, Schlegel, Skrutskie, Stetson, Totten, Valenti, Vernet-Viard   +40 more
core   +1 more source

FLUORINE IN THE SOLAR NEIGHBORHOOD: IS IT ALL PRODUCED IN ASYMPTOTIC GIANT BRANCH STARS? [PDF]

, 2014
The origin of “cosmic” fluorine is uncertain, but there are three proposed production sites/mechanisms for the origin: asymptotic giant branch (AGB) stars, ν nucleosynthesis in Type II supernovae, and/or the winds of Wolf–Rayet stars.
H. Jönsson, N. Ryde, G. Harper, M. Richter, K. Hinkle   +4 more
semanticscholar   +1 more source

Heterochrony and Oophagy Underlie the Evolution of Giant Filter‐Feeding Lamniform Sharks

Evolution &Development, Volume 27, Issue 1, March 2025.
Retention of juvenile craniofacial characteristics by paedomorphosis (heterochrony) may have facilitated the evolution of gigantism in filter‐feeding lamniform sharks, by increasing the efficiency of prey acquisition. ABSTRACT Evolutionary transitions toward gigantic body sizes have profound consequences for the structure and dynamics of ecological ...
Joel H. Gayford, Duncan J. Irschick, Andrew Chin, Jodie L. Rummer   +3 more
wiley   +1 more source

Ba Enrichment in Gaia MS+WD Binaries: Tracing s-process Element Production

The Astrophysical Journal Letters
A large population of intermediate-separation binaries, consisting of a main-sequence (MS) star and a white dwarf (WD), recently emerged from Gaia’s third data release (DR3), posing challenges to current models of binary evolution. Here we examine the s -
Param Rekhi, Sagi Ben-Ami, Na’ama Hallakoun, Sahar Shahaf, Silvia Toonen, Hans-Walter Rix   +5 more
doaj   +1 more source

Evolution of thermally pulsing asymptotic giant branch stars - I. The COLIBRI code [PDF]

, 2013
We present the COLIBRI code for computing the evolution of stars along the TP-AGB phase. Compared to purely synthetic TP-AGB codes, COLIBRI relaxes a significant part of their analytic formalism in favour of a detailed physics applied to a complete ...
P. Marigo, A. Bressan, A. Nanni, L. Girardi, M. L. Pumo   +4 more
semanticscholar   +1 more source

Revisiting Variable Stars Near Globular Clusters South of −29° Declination

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT We review an often‐cited but seldom‐accessed catalogue by Fourcade and Laborde (1966) of 785 variable stars near 47 southern Galactic globular clusters, and recover the locations of 85 stars that were not incorporated into subsequent variable star catalogues and hence have become “lost” to the literature.
Andrew C. Layden, Julia Evangelista, Sakshi Gupta, Mithilesh Mittameda, Eva Mulloy, Sohan I. Muslim, Tiyinoluwa Olushola‐Alao, Akul Rishi   +7 more
wiley   +1 more source