Results 11 to 20 of about 4,432 (267)
RR Lyrae and Type II Cepheid Variables in Globular Clusters: Optical and Infrared Properties
Universe, 2022 Globular clusters are both primary fossils of galactic evolution and formation and are ideal laboratories for constraining the evolution of low-mass and metal-poor stars.
Anupam Bhardwaj
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Distances to Nearby Molecular Clouds Traced by Young Stars
The Astrophysical Journal Supplement Series, 2023 I present a catalog of distances to 63 molecular clouds located within ∼2.5 kpc of the Sun. The cloud distances are derived based on utilizing the Gaia DR3 parallaxes of the young stellar objects (YSOs). By identifying AllWISE YSO candidates (YSOCs) with
Miaomiao Zhang
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Stellar Distances and Hipparcos [PDF]
International Astronomical Union Colloquium, 1993 AbstractHipparcos, the astrometric satellite of the European Space Agency, launched in August 1989, will provide absolute trigonometric parallaxes for about 100 000 stars brighter than the limiting V-magnitude 12.5. In spite of the difficulties caused by a faulty orbit, the mission is successfully going on.
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A New Wide-field Infrared Survey Explorer Calibration of Stellar Mass
The Astrophysical Journal, 2023 We derive new empirical scaling relations between Wide-field Infrared Survey Explorer (WISE) mid-IR (MIR) galaxy photometry and well-determined stellar masses from spectral energy distribution modeling of a suite of optical–infrared photometry provided ...
T. H. Jarrett +5 more
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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),
Dolphin, A. E. +9 more
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Stellar twins determine the distance of the Pleiades [PDF]
Astronomy & Astrophysics, 2016 Since the release of the Hipparcos catalog in 1997, the distance to the Pleiades open cluster has been heavily debated. The distance obtained from Hipparcos and those by alternative methods differ by 10 to 15 %. As accurate stellar distances are key to understanding stellar structure and evolution, this dilemma puts the validity of stellar evolution ...
Mädler, Thomas, +7 more
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Disk accretion onto a magnetized star
EPJ Web of Conferences, 2014 The problem of interaction of the rotating magnetic field, frozen to a star, with a thin well conducting accretion disk is solved exactly. It is shown that a disk pushes the magnetic field lines towards a star, compressing the stellar dipole magnetic ...
Istomin Ya. N., Haensel P.
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Dynamics of stellar and HI streams in the Milky Way halo
EPJ Web of Conferences, 2012 Stellar streams are key players in many aspects of Milky Way studies and, in particular, studying their orbital dynamics is crucial for furthering our understanding of the Milky Wayʼs gravitational potential.
Jin S.
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Stellar Distance and Velocity (II)
International Journal of Science and Research (IJSR), 2019 The use of parallax angles is one of the standard methods for determining stellar distance. The problem that arises in using this method is how to measure that angle. In order for the measurement to be correct, it is necessary for the object we are observing to be stationary in relation to the sun. This is generally not true.
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Distance errors and the stellar luminosity function [PDF]
Monthly Notices of the Royal Astronomical Society, 1989 Etude de la fonction de luminosite stellaire dans la region du pole galactique nord. La methode est basee sur les parallaxes photometriques derivees de l'indice de couleur V-I. Il est demontre que l'application du biais classique de Malmquist conduit a une fonction de luminosite incorrecte.
R. S. Stobie, K. Ishida, J. A. Peacock
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