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JWST/NIRCam detections of dusty subsolar-mass young stellar objects in the Small Magellanic Cloud
Low-mass stars are the most numerous stellar objects in the Universe. Before the James Webb Space Telescope (JWST), we had limited knowledge of how planetary systems around low-mass stars could form at subsola...
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Article
Transiting extrasolar planetary candidates in the Galactic bulge
More than 200 extrasolar planets have been discovered around relatively nearby stars, primarily through the Doppler line shifts owing to reflex motions of their host stars, and more recently through transits o...
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Article
The Need for Ultraviolet to Understand the Chemical Evolution of the Universe and Cosmology.
We identify an important set of key areas where an advanced observational Ultraviolet capability would have major impact on studies of cosmology and Galaxy formation in the young Universe. Most of these are as...
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Article
An energetic stellar outburst accompanied by circumstellar light echoes
Some classes of stars, including novae and supernovae, undergo explosive outbursts that eject stellar material into space. In 2002, the previously unknown variable star V838 Monocerotis brightened suddenly by ...
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Article
Gravitational microlensing by low-mass objects in the globular cluster M22
Gravitational microlensing offers a means of determining directly the masses of objects ranging from planets to stars, provided that the distances and motions of the lenses and sources can be determined1,2. A glo...
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Origins revealed in demise
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The accretion of interstellar matter by white dwarfs
The problem of the energy released by interstellar matter in its accretion by low-luminosity stars is examined. It is found that nearly all the gravitational energy is available as the energy source for the ac...