A headline-grabbing paper calculated the prevalence of Earth-sized planets with long orbital periods around Sun-like stars. But are these planets anything like Earth?
Cataclysmic variables are binary star systems where one of the stars—a white dwarf—devours its main sequence partner over time. Kepler proves yet again that it can find a lot more than just exoplanets by identifying a cataclysmic variable with a period of less than an hour.
Title: Evidence of an Asteroid Encountering a Pulsar Authors: P. R. Brook, A. Karastergiou, S. Buchner, S. J. Roberts, M. J. Keith, S. Johnson, R. M. Shannon First Author’s Institution: University of Oxford Pulsars- neutron stars formed during supernovae explosions- are often considered the “precision clocks” of radio astronomy. This is because of two fundamental properties observed from […]
Galactic bars have long been associated with many processes affecting galactic evolution. This paper studies how bars affect the star formation rate, mass and structure of a large sample of morphologically classified galaxies.
Our Solar System is pretty straightforward. Roughly speaking, all the planets orbit in the same plane, most spin on their axes in the same direction in that plane, and even the Sun rotates in a manner consistent with all this. The small, rocky planets are closer to the Sun, and the big, gaseous planets are farther from the Sun. Simple. Now that we are finding planets orbiting other stars, many are turning out to be multiplanet systems like our own Solar System.
In today’s “astrophysical classic”, we delve into the seminal paper behind the Kennicutt-Schmidt relation, the empirical correlation between the star formation rate and gas density.
Herschel observations reveal that debris disks are aligned with their stars’ equators, unlike some close-in transiting exoplanets.
Astronomers have found evidence of water in the remains of a planetary system around a white dwarf. This indicates water-rich asteroids can bring water to terrestrial planets, important for the habitability of planets.
The authors of this work report the discovery of the most distant, spectroscopically-confirmed galaxy found to date, which presently lies about 30 billion light years from Earth. The galaxy is being observed as it was at a time just 700 million years after the Big Bang, which is a mere 5% of the universe’s current age of 13.8 billion years.
Giant clouds of molecules in space provide the gain material for astrophysical masers, emitting microwave radiation by stimulated emission. These bright sources can be used to determine extragalactic distances and black hole masses. This paper reports on a search for new extragalactic water masers with the Very Long Baseline Array, and reports on the discovery of four sources in 37 objects searched.