Results 11 to 20 of about 42,257 (264)

Semiregular Variable Stars [PDF]

open access: yesAstrophysics, 2019
19pages, in Ukrainian, 5 figures, 4 ...
openaire   +2 more sources

SEARCHES OF THE PERIODS AND DEFINITION OF VARIABILITY TYPES OF NEW VARIABLE STARS TX Crv, DP Cam, IRAS 17583+5150

open access: yesOdessa Astronomical Publications, 2017
Measurements of brightness of stars TX Crv, DP Cam, IRAS 17583+5150 opened in "IRAS" and "HIPPARCOS" experiments are carried out using negatives of the Odessa observatory.
A. P. Solonovich   +2 more
doaj   +1 more source

SOME RESULTS OF THE U CrB OBSERVATIONS IN 1856 - 2007

open access: yesOdessa Astronomical Publications, 2017
Historical results over of photometry of eclipsing variable star U CrB (type of EA / SD) are brought after 1856 - 2007. Authors suppose that in the system U CrB there is a trade-out by a substance between components.
V. D. Grigorenko   +3 more
doaj   +1 more source

Extrasolar planets and possibility of the life appearance

open access: yesOdessa Astronomical Publications, 2017
Review opened to November, 2006 extrasolar planetary ...
I. Kuzenkov   +3 more
doaj   +1 more source

Sparse Logistic Regression for RR Lyrae versus Binaries Classification

open access: yesThe Astrophysical Journal, 2023
RR Lyrae (RRL) stars are old, low-mass, radially pulsating variable stars in their core helium burning phase. They are popular stellar tracers and primary distance indicators since they obey well-defined period–luminosity relations in the near-infrared ...
Piero Trevisan   +6 more
doaj   +1 more source

Investigating Stellar Variability in the Open Cluster Region NGC 381

open access: yesThe Astronomical Journal, 2023
We study variable stars in the field of the open cluster NGC 381 using photometric data observed over 27 nights and identify a total of 57 variable stars, six of which are member stars. The variable stars are classified based on their periods, amplitudes,
Jayanand Maurya   +3 more
doaj   +1 more source

Photometric studies of be star variability [PDF]

open access: yesExperimental Astronomy, 1994
Be stars are hot stars which have shown emission in at least one Balmer line on at least one occasion. As the definition implies, the Be phenomenon can be variable with time: on time scales of days to decades as the circumstellar disc develops and disperses; on time scales of days to months in a few Be stars which are interacting binaries; on time ...
openaire   +1 more source

Detection of Variable Stars in the Open Cluster M11 Using Difference Image Analysis Pipeline [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2010
We developed a photometric pipeline to be used for a wide field survey. This pipeline employs the difference image analysis (DIA) method appropriate for the photometry of star dense field such as the Galactic bulge.
Chung-Uk Lee   +5 more
doaj   +1 more source

Health‐Related Social Needs in Children With Sickle Cell Disease Are Associated With Worse Health‐Related Quality of Life

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with sickle cell disease (SCD) face multiple acute and chronic medical complications that may impact their quality of life as reported by patients themselves. Health‐related social needs (HRSNs), such as food and housing insecurity, are common in people with SCD, but the association between HRSNs and patient‐reported ...
Sarah J. Marks   +5 more
wiley   +1 more source

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