This paper reports on a near-infrared survey of early-type galaxies designed to provide information on bar strengths, bulges, disks, and bar parameters in a...
Fourier method of determining the rotational velocities in OB stars
Aims:We present a comprehensive study that applies the Fourier transform to a sample of O and early B-type stars (either dwarfs, giants, or supergiants) to...
To understand the physical processes governing accretion discs we can study active galactic nuclei (AGNs), X-ray binary systems (XRBs), and cataclysmic...
The geometric characteristics of dust clouds provide important information on the physical processes that structure such clouds. One of such characteristics is...
Fractional loop delays in adaptive optics modeling and control
This paper revisits the problem of optimal (minimum variance) control for adaptive optics (AO) systems when measurement and command applications are...
Fragments of harmony amid apparent chaos: A closer look at the X-ray quasi-periodic eruptions of the galaxy RX J1301.9+2747
Quasi-periodic eruptions (QPEs) are an extreme X-ray variability phenomenon associated with low-mass (M BH < 10 7 M ⊙) supermassive black holes (SMBHs). First...
Free-floating Planet Mass Function from MOA-II 9 yr Survey toward the Galactic Bulge
We present the first measurement of the mass function of free-floating planets (FFPs), or very wide orbit planets down to an Earth mass, from the MOA-II...
Free-floating planetary mass objects in LDN 1495 from Euclid Early Release Observations
Context. Substellar objects, including brown dwarfs and free-floating planetary-mass objects, are a significant product of star formation. Their sensitivity to...
Frequencies and splittings of low-degree solar P modes: results of the Luminosity Oscillations Imager.
The Luminosity Oscillations Imager is a part of the VIRGO instrument to be flown aboard the Solar and Heliospheric Observatory in mid 1995. Using a ground-based...