Structural Parameters of Star Clusters: Signal to Noise Effects
نویسندگان
چکیده
منابع مشابه
The Star Clusters of the Small Magellanic Cloud: Structural Parameters
We present structural parameters for 204 stellar clusters in the Small Magellanic Cloud derived from fitting King and Elson, Fall, & Freeman model profiles to the V-band surface brightness profiles as measured from the Magellanic Clouds Photometric Survey images. Both King and EFF profiles are satisfactory fits to the majority of the profiles although King profiles are generally slightly superi...
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We have carried out a series of small scale collisional N-body calculations of single-mass star clusters to investigate the dependence of the lifetime of star clusters on their initial parameters. Our models move through an external galaxy potential with a logarithmic density profile and they are limited by a cut-off radius. In order to find scaling relations between the lifetime of star cluste...
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We derive structural parameters for ∼ 2000 globular clusters in the giant Virgo elliptical M87 using extremely deep Hubble Space Telescope images in F606W (V) and F814W (I) taken with the ACS/WFC. The cluster scale sizes (half-light radii rh) and ellipticities are determined from PSF-convolved Kingmodel profile fitting. We find that the rh distribution closely resembles the inner Milky Way clus...
متن کاملStructural parameters of star clusters: relations among light, mass and star-count radial profiles and the dependence on photometric depth
Context. Structural parameters of model star clusters are measured in radial profiles built from number-density, massdensity and surface-brightness distributions, assuming as well different photometric conditions. Aims. Determine how the core, half-star count and tidal radii, as well as the concentration parameter, all of which are derived from number-density profiles, relate to the equivalent ...
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Currently available data on the field of velocities Vr, Vl, Vb for open star clusters are used to perform a kinematic analysis of various samples that differ by heliocentric distance, age, and membership in individual structures (the Orion, Carina–Sagittarius, and Perseus arms). Based on 375 clusters located within 5 kpc of the Sun with ages up to 1 Gyr, we have determined the Galactic rotation...
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ژورنال
عنوان ژورنال: Open Astronomy
سال: 2015
ISSN: 2543-6376
DOI: 10.1515/astro-2017-0231