Results 111 to 120 of about 19,928 (198)

Studies of interstellar reddening

, 1969
The wavelength dependence of interstellar obscuration, in magnitudes against reciprocal wavelength, is known to be well represented, over the visible part of the spectrum, by two straight lines intersecting at or near the broad interstellar absorption band at 4430A. The existing measures, obtained principally from low dispersion objective prism spectra,
openaire   +1 more source

Diffuse interstellar bands in the near-infrared: expanding the reddening range

Monthly Notices of the Royal Astronomical Society
ABSTRACT We have investigated the behaviour of three strong near-infrared diffuse interstellar bands (DIBs) at λ13177 Å, λ14680 Å, and λ15272 Å, on a larger sample of sightlines and over a wider range of extinctions than previously studied, utilizing spectra from three observatories.
R Castellanos, F Najarro, M Garcia, L R Patrick, T R Geballe   +4 more
openaire   +2 more sources

Observational Evidence of Dust Evolution in Supernova Remnants: Size Redistribution toward Larger Grains in the Early Sedov Phase

The Astrophysical Journal Letters
Recent observations have revealed that dust is widespread and abundant in galaxies up to z  ≃ 8, significantly influencing their appearance and spectral properties.
He Zhao, Bingqiu Chen, Jun Li
doaj   +1 more source

Considering light-matter interactions in the Friedmann equations. [PDF]

Proc Math Phys Eng Sci, 2022
Vavryčuk V.
europepmc   +1 more source

A Survey of Recent Interstellar Reddening Observations [PDF]

Monthly Notices of the Royal Astronomical Society, 1967
K. Nandy, N. C. Wickramasinghe
openaire   +1 more source

Photographic Photometry of NGC 6866

Journal of Mathematical and Fundamental Sciences, 2019
. Magnitudes and colors in the UBV photometric system have been determined for 575 stars in and around NGC 6866. The color-color relation of the cluster stars provides an estimate of interstellar reddening of 0.16 mag. The distance of cluster is found to
B. Hidajat, W. Sutantyo
doaj  

Connecting Dust and Outflows in Active Galactic Nuclei: The Intriguing Case of NGC 6860

The Astrophysical Journal
Cosmic dust plays a crucial role in the evolution of galaxies, significantly influencing star formation and the interstellar medium. However, in active galactic nuclei (AGNs), the role and origin of dust remain poorly understood.
I. Psaradaki, M. Mehdipour, D. Rogantini, E. Costantini, N. Schulz, S. Zeegers, E. Caruso   +6 more
doaj   +1 more source

Interstellar reddening in the galaxy

, 1964
Objective prism spectra obtained with the 16/24/60-inch Schmidt telescope have been used for an investigation of the wavelength dependence of interstellar absorption in the spectral range from 8000A to 3450A, in a region of 30 square degrees in Cygnus centred on (20ʰ15ᵐ, 38 °).
openaire   +1 more source

A radio-detected type Ia supernova with helium-rich circumstellar material. [PDF]

Nature, 2023
Kool EC, Johansson J, Sollerman J, Moldón J, Moriya TJ, Mattila S, Schulze S, Chomiuk L, Pérez-Torres M, Harris C, Lundqvist P, Graham M, Yang S, Perley DA, Strotjohann NL, Fremling C, Gal-Yam A, Lezmy J, Maguire K, Omand C, Smith M, Andreoni I, Bellm EC, Bloom JS, De K, Groom SL, Kasliwal MM, Masci FJ, Medford MS, Park S, Purdum J, Reynolds TM, Riddle R, Robert E, Ryder SD, Sharma Y, Stern D.   +36 more
europepmc   +1 more source

Testing Cluster Membership of Planetary Nebulae with High-precision Proper Motions. II. HST Observations of PHR J1315–6555 in the Open Cluster AL 1 (ESO 96-SC04)

The Astronomical Journal
Planetary nebulae (PNe) shown to be members of star clusters provide information on their properties and evolutionary histories that cannot be determined for PNe in the field, in particular the initial masses of their progenitor stars.
Andrea Bellini, Howard E. Bond, Kailash C. Sahu   +2 more
doaj   +1 more source