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The photometry and kinematics studies of NGC 2509 derived from Gaia DR3 [PDF]

Scientific Reports
This research uses the third edition of the Gaia Data Release (DR3) to re-investigate the open star cluster NGC 2509. We employed the pyUPMASK Python package and HDBSCAN algorithms to identify the cluster member stars.
Nasser M. Ahmed, A. L. Tadross
doaj +2 more sources

Reddening Cheeks and Inducing Sweat: The Logic of Party Law in Xi Jinping’s China [PDF]

Hague Journal on the Rule of Law
Abstract The Chinese Communist Party under Xi Jinping has spent the past 13 years creating an “intraparty regulatory system,” or what this article calls “Party law.” Scholars ascribe different meanings to this system and its implications for Chinese law and governance.
Holly Snape
openalex +2 more sources

Measuring the Slope of the Dust Extinction Law and the Power Spectrum of Dust Clouds Using Differentially Reddened Globular Clusters [PDF]

The Astronomical Journal, 2004
We present 3 methods for measuring the Galactic dust extinction law slope R_V and a method for quantifying fine structure in dust clouds in the direction of differentially-reddened globular clusters. We apply these methods to the low- latitude globular cluster NGC4833 which displays variable extinction/reddening about a mean ~ 1.
J. Melbourne, P. Guhathakurta
openalex +4 more sources

R associations. VI - The reddening law in dust clouds and the nature of early-type emission stars in nebulosity from a study of five associations

The Astronomical Journal, 1982
Positions, identification charts, UBVRIKLMN photometry and spectral types are given for stars, illuminating reflection nebulae that are visible on the POSS prints, which have been identified in five associations. With a ratio of total to selective extinction of 4.2, the reddening law applicable to the dust clouds in which the stars are embedded is ...
W. Herbst, J. W. Warner, D. P. Miller, A. Herzog +3 more
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An Attempt to Determine the Circumstellar Reddening Law [PDF]