Results 11 to 20 of about 4,400 (313)
Surface rotation of Kepler red giant stars [PDF]
Astronomy & Astrophysics, 2017 Kepler allows the measurement of starspot variability in a large sample of field red giants for the first time. With a new method that combines autocorrelation and wavelet decomposition, we measure 361 rotation periods from the full set of 17 377 oscillating red giants in our sample.
T. Ceillier +9 more
openaire +4 more sources
Red Giants Search Method Based on Convolutional Neural Networks
The Astronomical Journal, 2023 Red giants play a crucial role in astronomical exploration. However, the current search for these stars heavily relies on spectrum analysis, making it a cumbersome process.
Hao Yuan +7 more
doaj +1 more source
EPJ Web of Conferences, 2013 CoRoT and Kepler measurements reveal us that the amplitudes of solar-like oscillations detected in red giant stars scale from stars to stars in a characteristic way. This observed scaling relation is not yet fully understood but constitutes potentially a
Barban C. +7 more
doaj +1 more source
The Astronomical Journal, 2023 Wide-field and deep DECam multiband photometry, combined with HST data for the core of the Galactic globular cluster NGC 2808, allowed us to study the distribution of various stellar subpopulations and stars in different evolutionary phases out to the ...
Christian I. Johnson +9 more
doaj +1 more source
The Astrophysical Journal, 2023 We report the discovery of 2M0056–08 as an equal-mass eclipsing binary (EB), comprising two red straggler stars (RSSs) with an orbital period of 33.9 days. Both stars have masses of ≈1.419 M _⊙ , identical to within 0.2%.
Keivan G. Stassun +9 more
doaj +1 more source
Asteroseismology of red giant stars [PDF]
, 2015 Chapter 11 of the book Extraterrestrial Seismology, 16 pages, 7 ...
Garcia, Rafael A., Stello, Dennis
openaire +2 more sources
Update on the APOKASC analysis of Red Giants
EPJ Web of Conferences, 2017 APOKASC is a collaboration between APOGEE's spectroscopic survey in the near IR at Apache Point (SDSS) and Kepler Asteroseismic Science Consortium (KASC) for the study of red-giant stars.
Elsworth Yvonne
doaj +1 more source
Rotation in sdB stars as revealed by stellar oscillations
Open Astronomy, 2018 An interesting opportunity offered by the detection of stellar oscillations is the possibility to infer the internal rotation rate of a star through the so-called rotational splittings. Such seismic measurements remained rather scarce for hot B subdwarf (
Charpinet Stephane +5 more
doaj +1 more source
Quantifying Uncertainties on the Tip of the Red Giant Branch Method
The Astronomical Journal, 2023 We present an extensive grid of numerical simulations quantifying the uncertainties in measurements of the tip of the red giant branch (TRGB). These simulations incorporate a luminosity function composed of 2 mag of red giant branch (RGB) stars leading ...
Barry F. Madore +3 more
doaj +1 more source
Giant Planet Engulfment by Evolved Giant Stars: Light Curves, Asteroseismology, and Survivability
The Astrophysical Journal, 2023 About ten percent of Sun-like (1–2 M _⊙ ) stars will engulf a 1–10 M _J planet as they expand during the red giant branch (RGB) or asymptotic giant branch (AGB) phase of their evolution.
Christopher E. O’Connor +3 more
doaj +1 more source