Stars

Blogs about stars

HDUV GOODS-North Field Compass (Image NASA, ESA, P. Oesch (University of Geneva), and M. Montes (University of New South Wales))

An article published in the journal “Astrophysical Journal Supplement Series” presents the Hubble Deep UV (HDUV) Legacy Survey program, a great panorama of the universe’s evolutionary history based on observations carried out with the Hubble Space Telescope. A team of researchers exploited Hubble’s ultraviolet detection capabilities, combining it with infrared and visible light observations, also from other telescopes, to extend previous surveys with a field of view that includes about 15,000 galaxies, including 12,000 in which there’s star formation.

The sky around NGC 5018

An article accepted for publication in “The Astrophysical Journal” describes the VST Early-type GAlaxy Survey (VEGAS). A team of researchers led by Marilena Spavone from INAF-Astronomical Observatory of Capodimonte in Naples, Italy, used ESO’s VLT Survey Telescope (VST) in Chile to obtain highly detailed images of many elliptical galaxies. Among them there’s NGC 5018, interesting among other things for structures such as what’s called a tidal tail, a stream of gas containing various stars stretching outwards from that galaxy. These are evidence of interactions between galaxies that provide information on the characteristics of primordial galaxies.

44 exoplanets detected by the Kepler space telescope confirmed in one go

An article published in “The Astronomical Journal” describes the confirmation of 44 exoplanets that are part of an original group of 72 candidates detected by NASA’s Kepler space telescope. A team of researchers led by John Livingston of the University of Tokyo, Japan, used data collected by ESA’s Gaia space probe and ground-based telescopes in the US to confirm the existence of 44 exoplanets in one go and discover some of their characteristics. 16 of them have a radius less than twice the Earth’s.

Artist's concept of SIMP J01365663+0933473 (Image Caltech/Chuck Carter; NRAO/AUI/NSF)

An article published in the “Astrophysical Journal” describes a study on the magnetic fields of five brown dwarfs, objects at the limit between the planet and the star, cold even by the standards of their category. A team of researchers used the Very Large Array (VLA) radio telescope to examine the brown dwarfs chosen due to their radio wave emissions. The one cataloged as SIMP J01365663+0933473 is especially interesting because it’s at the limit between the planet and the brown dwarf and has a magnetic field over 200 times stronger than Jupiter’s.