Results 61 to 70 of about 206,533 (326)

From Solar to Stellar Brightness Variations: The Effect of Metallicity

, 2018
Context. Comparison studies of Sun-like stars with the Sun suggest an anomalously low photometric variability of the Sun compared to Sun-like stars with similar magnetic activity.
Krivova, N. A., Schmutz, W., Shapiro, A. I., Solanki, S. K., Witzke, V.   +4 more
core   +1 more source

Two Different Weak Modulations in ab-type RR Lyrae Variable V838 Cyg, and Potential Influence of Metal Abundance on Blazhko Modulation

The Astronomical Journal, 2023
Noting the weakest modulation and relatively high metal abundance of the ab-type RR Lyrae star V838 Cyg, we collected the photometric data of this star from several sky surveys to carry out an in-depth analysis. The O − C diagram shows that the pulsation
L.-J. Li, S.-B. Qian, X.-D. Shi, L.-Y. Zhu   +3 more
doaj   +1 more source

Eclipsing binaries in the MACHO database: New periods and classifications for 3031 systems in the Large Magellanic Cloud [PDF]

, 2007
Eclipsing binaries offer a unique opportunity to determine fundamental physical parameters of stars using the constraints on the geometry of the systems. Here we present a reanalysis of publicly available two-color observations of about 6800 stars in the
A. Derekas, Aubourg E., Giuricin G., Johnson A., L. L. Kiss, Lah P., Palen S., Pojmanski G., T. R. Bedding, Udalski A.   +9 more
core   +2 more sources

Photometric Calibrations of M-dwarf Metallicity with Markov Chain Monte Carlo and Bayesian Inference

The Astrophysical Journal, 2023
Knowledge of stellar atmospheric parameters ( T _eff , $\mathrm{log}g$ , [Fe/H]) of M dwarfs can be used to constrain both theoretical stellar models and Galactic chemical evolutionary models, and guide exoplanet searches, but their determination is ...
C. Duque-Arribas, D. Montes, H. M. Tabernero, J. A. Caballero, J. Gorgas, E. Marfil   +5 more
doaj   +1 more source

Towards an Accurate Determination of Parameters for Very Massive Stars: the Eclipsing Binary LMC-SC1-105 [PDF]

, 2008
This paper presents a photometric and spectroscopic study of the bright blue eclipsing binary LMC-SC1-105, selected from the OGLE catalog as a candidate host of very massive stars (>=30Mo).
Alceste Z. Bonanos, Andersen, Bagnuolo, Bally, Bonanos, Bonanos, Bonanos, Bouret, Bromm, Claret, Derekas, Elmegreen, Faccioli, Fitzpatrick, Gies, González, Hadrava, Herrero, Hilditch, Howarth, Kelson, Krumholz, Lanz, Massey, Massey, Massey, Mayer, Maíz Apellániz, Mochnacki, Nelson, O'Connell, Oey, Pinsonneault, Prša, Ribas, Santolaya-Rey, Schaerer, Schaller, Schwarzenberg-Czerny, Simon, Soszynski, Stickland, Walborn, Zebrun   +43 more
core   +1 more source

Fundamental parameters of bright Ap stars from wide-range energy distributions and advanced atmospheric models [PDF]

, 2012
Aims. As a well-established procedure for the vast majority of normal main-sequence stars, determination of atmospheric and stellar parameters turns to be a challenging process in case of magnetic chemically peculiar stars.
D. Shulyak, T. Ryabchikova, O. Kochukhov
semanticscholar   +1 more source

OB Stars in the Solar Neighborhood I: Analysis of their Spatial Distribution [PDF]

, 2006
We present a newly-developed, three-dimensional spatial classification method, designed to analyze the spatial distribution of early type stars within the 1 kpc sphere around the Sun.
Balona B. A., Blaauw A., Cabrera-Cano J., Cabrera-Cano J., Comeron F., E. J. Alfaro, Efremov Yu. N., F. Elias, Gilmore G., Hammersley P. L., J. Cabrera-Caño, Kaltcheva N., Lindblad P. O., Lindblad P. O., Pellegatti Franco G. A., Poppel W., Torra J., Westin T. N. G.   +17 more
core   +3 more sources

Nutritional and Behavioral Intervention for Long‐Term Childhood Acute Leukemia Survivors With Metabolic Syndrome

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Purpose Metabolic syndrome (MetS) is a common complication in survivors of childhood acute lymphoblastic and myeloid leukemia (AL), and a major risk factor for premature cardiovascular disease, type‐2‐diabetes, and metabolic dysfunction‐associated steatotic liver disease (MASLD).
Visentin Sandrine, Béliard Sophie, Renard Cécile, Caussy Cyrielle, Hamidou Zeinab, Romano David, Gacem Mélanie, Petit Arnaud, Saultier Paul, Borentain Patrick, Michel Gérard   +10 more
wiley   +1 more source

Changes in Body Composition in Children and Young People Undergoing Treatment for Acute Lymphoblastic Leukemia: A Systematic Review and Meta‐Analysis

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Ongoing evidence indicates increased risk of sarcopenic obesity among children and young people (CYP) with acute lymphoblastic leukemia (ALL), often beginning early in treatment, persisting into survivorship. This review evaluates current literature on body composition in CYP with ALL during and after treatment.
Lina A. Zahed, Raquel Revuelta Iniesta, Mary Fewtrell, Julie Lanigan, Breeana Gardiner, Graeme O'Connor   +5 more
wiley   +1 more source

A Large Catalog of DA White Dwarf Characteristics Using SDSS and Gaia Observations

The Astrophysical Journal
We present a catalog of 8545 and 19,257 unique DA white dwarfs (WDs) observed in Sloan Digital Sky Survey (SDSS) Data Release 19 and previous SDSS data releases, respectively. This is the largest catalog of both spectroscopic and photometric measurements
Nicole R. Crumpler, Vedant Chandra, Nadia L. Zakamska, Gautham Adamane Pallathadka, Stefan Arseneau, Nicola Gentile Fusillo, J. J. Hermes, Carles Badenes, Priyanka Chakraborty, Boris T. Gänsicke, Sean Morrison, Hans-Walter Rix, Stephen P. Schmidt, Axel Schwope, Keivan G. Stassun   +14 more
doaj   +1 more source