Results 61 to 70 of about 563,854 (280)

Strong Variability in AzV 493, an Extreme Oe-type Star in the SMC

open access: yesThe Astrophysical Journal, 2023
We present 18 yr of OGLE photometry together with spectra obtained over 12 yr revealing that the early Oe star AzV 493 shows strong photometric (Δ I < 1.2 mag) and spectroscopic variability with a dominant, 14.6 yr pattern and ∼40 day oscillations.
M. S. Oey   +13 more
doaj   +1 more source

Spitzer 24 micron Survey of Debris Disks in the Pleiades [PDF]

open access: yes, 2006
We performed a 24 micron 2 Deg X 1 Deg survey of the Pleiades cluster, using the MIPS instrument on Spitzer. Fifty four members ranging in spectral type from B8 to K6 show 24 micron fluxes consistent with bare photospheres.
Baraffe I.   +16 more
core   +3 more sources

Treatment Decision‐Making Roles and Preferences Among Adolescents and Young Adults With Cancer

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Decision‐making (DM) dynamics between adolescents and young adults (AYAs) with cancer, parents, and oncologists remain underexplored in diverse populations. We examined cancer treatment DM preferences among an ethnically and socioeconomically diverse group of AYAs and their parents.
Amanda M. Gutierrez   +14 more
wiley   +1 more source

X-ray counterparts to stellar MeerKAT Galactic-plane compact radio sources

open access: yesAstronomy & Astrophysics
Context. Radio emission from magnetically active stars arises primarily from non-thermal processes and provides information complementary to their high-energy X-ray emission.
Egbo O. D.   +7 more
doaj   +1 more source

Overstable convective modes in rotating early-type stars [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2021
ABSTRACT We calculate overstable convective (OsC) modes of 2-, 4-, and $20\hbox{-}{\rm M}_\odot$ main-sequence stars. To compute non-adiabatic OsC modes in the core, we assume $(\nabla \cdot \rm{\boldsymbol {F}}_{\rm C})^\prime =0$ as a prescription for the approximation called frozen-in convection in pulsating stars, where $\rm ...
openaire   +2 more sources

A PRSZT Registry Analysis of Prognostic Factors Influencing Survival and Relapse Rates After Second Allogeneic Hematopoietic Stem Cell Transplantation in Pediatric Acute Lymphoblastic Leukemia

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT A second allogeneic (allo‐)hematopoietic stem cell transplantation (HSCT2) is a potential curative option for pediatric patients with acute lymphoblastic leukemia (ALL) following relapse after first allogeneic transplantation (HSCT1), but its efficacy is limited by high relapse rates and transplant‐related toxicity in highly pretreated ...
Ava Momm   +10 more
wiley   +1 more source

Ultraviolet Spectrophotometry of Early-Type Stars

open access: yesThe Astronomical Journal, 1964
Spinning rockets UV spectrophotometry of early type stars, discussing instrumentation, calibration, data recording and stellar ...
openaire   +1 more source

Upacicalcet: A Novel Intravenous Calcimimetic Agent for Patients Undergoing Hemodialysis With Secondary Hyperparathyroidism

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Secondary hyperparathyroidism (SHPT) is a common complication in patients receiving maintenance dialysis, driven by calcium and phosphate metabolism disturbances. Calcimimetics are central to the management of SHPT by enhancing calcium‐sensing receptor sensitivity and reducing parathyroid hormone secretion.
Fumihiko Koiwa   +3 more
wiley   +1 more source

Detection of Two Totally Eclipsing B-type Binaries with Extremely Low Mass Ratios

open access: yesThe Astrophysical Journal
The detection of O- and B-type stars with extremely low-mass companions is very important for understanding the formation and evolution of binary stars. However, finding them remains a challenge because the low-mass components in such systems contribute ...
Linfeng Chang   +3 more
doaj   +1 more source

Long-Term Spectroscopic Monitoring and Surveys of Early-Type Stars with and without Circumstellar Envelopes

open access: yesOpen Astronomy, 2017
Ongoing studies of different groups of stars result in improving our knowledge of their fundamental parameters and evolutionary status. Also, they result in finding new phases of stellar evolution, which require theoretical explanation. At the same time,
Miroshnichenko Anatoly S.   +9 more
doaj   +1 more source

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