Results 51 to 60 of about 182,911 (335)
Refining the Stellar Parameters of τ Ceti: a Pole-on Solar Analog
The Astronomical Journal, 2023 To accurately characterize the planets a star may be hosting, stellar parameters must first be well determined. τ Ceti is a nearby solar analog and often a target for exoplanet searches.
Maria Korolik +18 more
doaj +1 more source
Physics of Rotation in Stellar Models [PDF]
, 2009 32 pages, 7 figures, lectures, CNRS school, will be published by ...
openaire +3 more sources
Rotation of planet-harbouring stars [PDF]
, 2017 The rotation rate of a star has important implications for the detectability, characterisation and stability of any planets that may be orbiting it. This chapter gives a brief overview of stellar rotation before describing the methods used to measure the rotation periods of planet host stars, the factors affecting the evolution of a star's rotation ...
arxiv +1 more source
Molecular Oncology, EarlyView.This study investigates an alternative approach to reactivating the oncosuppressor p53 in cancer. A short peptide targeting the association of the two p53 inhibitors, MDM2 and MDM4, induces an otherwise therapeutically active p53 with unique features that promote cell death and potentially reduce toxicity towards proliferating nontumor cells.
Sonia Valentini +10 more
wiley +1 more source
Constraining Stellar Rotation at the ZAMS
, 2021 As Solar-type stars approach the main sequence, they contract and spin more rapidly; once they reach the main sequence, they stop contracting and their spin speed decreases. This spin-down is thought to be caused by angular momentum lost via stellar winds, but there are currently limited constraints on model behavior at this critical age.
Douglas, Stephanie T. +7 more
openaire +3 more sources
The difference in age of the two counter-rotating stellar disks of the spiral galaxy NGC 4138 [PDF]
A&A 570, A79 (2014), 2014 The Sa spiral NGC 4138 is known to host two counter-rotating stellar disks, with the ionized gas co-rotating with one of them. We measured the kinematics and properties of the two counter-rotating stellar populations to constrain their formation scenario. A spectroscopic decomposition of the observed major-axis spectrum was performed to disentangle the
arxiv +1 more source
Evaluation of synaptotagmin‐1 action models by all‐atom molecular dynamics simulations
FEBS Open Bio, EarlyView.We used molecular dynamics simulations to test models proposing that synaptotagmin‐1 facilitates membrane fusion by perturbing lipid bilayers, inducing membrane curvature and/or bridging membranes. The simulations show that synaptotagmin‐1 C2‐domains placed near the site of fusion hinder the ability of SNARE complexes to bring the membranes together ...
Josep Rizo +2 more
wiley +1 more source
A study of stellar population of intermediate-age globular cluster NGC 2249
Results in Physics, 2020 The Large Magellanic Cloud (LMC) star cluster NGC 2249 has been found to exhibit an extended main-sequence turn-off (eMSTO) in the color-magnitude diagram (CMD) derived from the data of the Hubble Space Telescope (HST).
Zhongmu Li +4 more
doaj
Constraints on Magnetic Braking from the G8 Dwarf Stars 61 UMa and τ Cet
The Astrophysical Journal Letters, 2023 During the first half of their main-sequence lifetimes, stars rapidly lose angular momentum to their magnetized winds, a process known as magnetic braking.
Travis S. Metcalfe +13 more
doaj +1 more source
Starspot Activity without Pulsation in the Binary System KIC 5444392 Revisited
Universe, 2023 We revisited the short-period (∼1.5 days) binary system KIC 5444392, which shows quasi-period modulated light variations. Previous studies indicated that these variations might be caused by stellar pulsations.
Mengqi Jin +3 more
doaj +1 more source