Results 1 to 10 of about 909,763 (253)

Variable Stars in M31 Stellar Clusters from the Panchromatic Hubble Andromeda Treasury

open access: yesThe Astrophysical Journal
Variable stars in stellar clusters can offer key constraints on stellar evolution and pulsation models, utilizing estimates of host cluster properties to constrain stellar physical parameters.
Richard Smith   +11 more
doaj   +1 more source

On the Limitations of the Anomalous Microwave Emission Emissivity

open access: yesAdvances in Astronomy, 2012
Many studies of anomalous microwave emission (AME) have computed an AME emissivity to compare the strength of the AME detected in different regions. Such a value is usually defined as the ratio between the intensity of the AME at 1 cm and the thermal ...
Christopher T. Tibbs   +2 more
doaj   +1 more source

How Massive Star Clusters Form and Evolve: A Near-IR Survey of the W51 Complex

open access: yesThe Astronomical Journal
We present near-infrared JHK _s and narrowband H _2 (1–0) photometric observations of the W51A region, obtained with GTC EMIR, aiming to characterize its young stellar population, and provide mass estimates for individual cluster members and the ...
Aden Dawson   +2 more
doaj   +1 more source

Evidence for Random Walk Transport of Small Asteroids from the Main Belt to the Inner Solar System

open access: yesThe Planetary Science Journal
The transport of some main-belt asteroids to the inner solar system depends on Yarkovsky radiation forces changing the orbits of those asteroids. However, these forces depend on the rotational states of the asteroids, and YORP radiation forces act to ...
Stanley F. Dermott   +2 more
doaj   +1 more source

SMILES Initial Data Release: Unveiling the Obscured Universe with MIRI Multiband Imaging

open access: yesThe Astrophysical Journal
The James Webb Space Telescope is revolutionizing our view of the Universe through unprecedented sensitivity and resolution in the infrared, with some of the largest gains realized at its longest wavelengths.
Stacey Alberts   +14 more
doaj   +1 more source

An Improved Atlas of Full-scan Spectra from ISO/SWS

open access: yesThe Astrophysical Journal Supplement Series
We present an atlas of full-scan spectra from the Short-Wavelength Spectrometer (SWS) on board the Infrared Space Observatory after reprocessing and improving an earlier version published 22 yr ago. The SWS spectra cover the wavelength range from 2.35 to
D. R. Mizuno   +6 more
doaj   +1 more source

Role of Polycyclic Aromatic Hydrocarbons with Edge Defects in Explaining Astronomical Infrared Emission Observations

open access: yesThe Astrophysical Journal
A systematic study was performed on the spectral properties of polycyclic aromatic hydrocarbons (PAHs) with edge defects using harmonic density functional theory calculations.
A. Ricca   +4 more
doaj   +1 more source

A Simple Model of the Radio–Infrared Correlation Depending on Gas Surface Density and Redshift

open access: yesThe Astrophysical Journal
We introduce a simple parametric model of the radio–infrared correlation (i.e., the ratio between the IR luminosity and the 1.4 GHz radio luminosity, q _IR ) by considering the energy loss rate of high-energy cosmic-ray (CR) electrons governed by ...
Ilsang Yoon
doaj   +1 more source

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