Results 21 to 30 of about 5,583,252 (183)
The colour-lightcurve shape relation of type Ia supernovae and the reddening law [PDF]
Astronomy & Astrophysics, 2008 A study of the time sequence of optical colours of a large sample of nearby Type Ia supernovae (SNe Ia) is presented. We study the dependence of the colour time evolution with respect to the lightcurve shape, parametrized by the stretch factor. We fit the spectral template that minimizes the colour dispersion in SNe Ia, as measured through UBVRI ...
Nobili, Serena, Goobar, Ariel
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Six-color photometry of stars. I. The law of space reddening from the colors of O and B stars
Astrophysical Journal, 1943 J Stebbins, A E Whitford
exaly +2 more sources
A Walk through AGN Country—For the Somewhat Initiated!
Galaxies, 2023 Key issues in AGN and galaxy formation are discussed. Very successful Unified Models explain much of the variety of AGN with orientation effects; the ingredients are shadowing by a dusty “torus” and relativistic beaming.
Robert R. J. Antonucci
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The UV and optical reddening law to the Galactic Bulge and CNO abundances in Bulge planetary nebulae [PDF]
Symposium - International Astronomical Union, 1993 An analysis of the differential ultraviolet extinction towards four bulge planetary nebulae, based on the observed line ratio of He II 1640/4686Å, shows that the ultraviolet reddening law towards the bulge is much steeper than in the solar neighbourhood.
N. A. Walton +2 more
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JWST’s PEARLS: Dust Attenuation and Gravitational Lensing in the Backlit-galaxy System VV 191
The Astronomical Journal, 2023 We derive the spatial and wavelength behavior of dust attenuation in the multiple-armed spiral galaxy VV 191b using backlighting by the superimposed elliptical system VV 191a in a pair with an exceptionally favorable geometry for this measurement ...
William C. Keel +30 more
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Massive luminous early type stars in the LMC [PDF]
Astronomy & Astrophysics, 2002 In order to construct a comprehensive HRD of early type stars in the Large Magellanic Cloud (LMC) in the first step the reddenings of individual stars and the LMC reddening law have been investigated. 1942 LMC member stars with good UBV photometries from the Bochum photometry data base have been first corrected individually for galactic foreground ...
Gochermann, J., Schmidt-Kaler, T.
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An HST Study of the Substellar Population of NGC 2024
The Astrophysical Journal, 2023 We performed an HST/WFC3-IR imaging survey of the young stellar cluster NGC 2024 in three filters probing the 1.4 μ m H _2 O absorption feature, characteristic of the population of low-mass and substellar-mass objects down to a few Jupiter masses.
Massimo Robberto +8 more
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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.
Melbourne, J., Guhathakurta, P.
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The Astrophysical Journal LettersThe interstellar extinction law is important for interpreting observations and inferring the properties of interstellar dust grains. Based on the 993 prism/CLEAR spectra from the James Webb Space Telescope (JWST), we investigate the 0.6–5.3 μ m ...
Shu Wang, Xiaodian Chen
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Red and infrared colours of B stars and the reddening law in the Galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 1997 The red and infrared intrinsic colours of B stars are derived from photometric observations through the UBV(R1)cJHK and H,8 filters of 257 early-type stars. Those stars for which the UBV and H,8 measurements match the published spectral class, and which show no other signs of peculiarity, are used to determine the intrinsic photometric colours of B ...
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