Results 1 to 10 of about 4,604 (163)
The stellar content and distance of UGC 4483 [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 We present HST/WFPC2 observations of UGC 4483, an irregular galaxy in the M81/NGC 2403 complex. Stellar photometry was carried out with HSTphot, and is complete to V ~ 26.0 and I ~ 24.7. We measure the red giant branch tip at I = 23.56 +/- 0.10 and calculated a distance modulus of (m-M)o = 27.53 +/- 0.12 (corresponding to a distance of 3.2 +/- 0.2 Mpc),
P Seitzer +2 more
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Journal of Applied Mathematics and Physics, 2019 In this paper, a method is presented by which it is possible to determine a distance between the sun and a star as well as a velocity at which the star moves relative to the sun. In order to achieve this, it is sufficient to know three positions of the star and the unit vectors determined by the star and three arbitrarily chosen points that do not lie ...
Miloš Čojanović
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DREAM-Stellar: parallel and space efficient exact local alignment [PDF]
BMC BioinformaticsBackground Searching large genomic data sets for local alignments poses a computational challenge. A particular obstacle is the handling of repetitive sequences that appear in various contexts and incur a high runtime cost. For practical homology search,
Evelin Aasna +3 more
doaj +2 more sources
Cepheids as distance indicators and stellar tracers
Astronomy and Astrophysics ReviewAbstractWe review the phenomenology of classical Cepheids (CCs), Anomalous Cepheids (ACs) and type II Cepheids (TIICs) in the Milky Way (MW) and in the Magellanic Clouds (MCs). We also examine the Hertzsprung progression in different stellar systems by using the shape of I-band light curves (Fourier parameters) and observables based on the difference ...
Vittorio Francesco Braga +2 more
exaly +4 more sources
Research on the Detection Method of Projection Stellar Target Simulator
Photonics, 2023 The projection stellar target simulator is a stellar target simulator in which star points are projected to be imaged on a fixed plane at a fixed distance.
Jianan Kang +4 more
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The Astrophysical Journal, 2023 We present precise photometric estimates of stellar parameters, including effective temperature, metallicity, luminosity classification, distance, and stellar age, for nearly 26 million stars using the methodology developed in the first paper of this ...
Yang Huang +20 more
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The Astronomical Journal, 2023 The absolute age of a simple stellar population is of fundamental interest for a wide range of applications but is difficult to measure in practice, as it requires an understanding of the uncertainties in a variety of stellar evolution processes as well ...
Jiaqi (Martin) Ying +5 more
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The Astronomical Journal, 2023 The accuracy of stellar distances inferred purely from parallaxes degrades rapidly with distance. Proper motion measurements, when combined with some idea of typical velocities, provide independent information on stellar distances.
C. A. L. Bailer-Jones
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The Astrophysical Journal, 2023 The tip of the red giant branch (TRGB) is an apparent discontinuity of the luminosity function (LF) due to the end of the red giant evolutionary phase and is used to measure distances in the local universe.
J. Wu +7 more
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A Catalog of Distance Determinations for the LAMOST DR8 K Giants in the Galactic Halo
The Astronomical Journal, 2023 We present a catalog of distances for 19,544 K giants drawn from Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR8. Most of them are located in the halo of the Milky Way up to ∼120 kpc.
Lan Zhang +6 more
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