astrobites
observation
Two types of type Ia supernova?
What if type Ia supernova are not all made the same way? For the first time, a study links type Ia supernova explosions to their parent systems, uncovering evidence for two different ways to produce these purportedly “standard” explosions.
A World without Smog
If you would like to live in a less-polluted world, you might want to consider moving to Wasp-19b. Its lack of a temperature inversion helps it keep clear skies.
Evidence for Two Kinds of Pulsars
This paper presents the first evidence of two distinct populations of pulsars, which the authors speculate stem from a difference in how they are formed.
Of Green Peas and B-fields: how do galaxies get their magnetic field?
Today, most observational astronomy is done by large teams. But there are large teams, and then there are large teams — the paper I’m discussing today builds on the work of 250,000 members of the public who participated in the Galaxy Zoo galaxy classification project.
Quakes on Jupiter: a new look at a familiar object
In this paper, techniques from helioseismology – using waves to learn about the interior of the Sun – are applied to yet another object: Jupiter. Because Jupiter is largely a fluid, like the Sun, astronomers have expected it to show global seismic behavior since the mid-1970s; the signal was even theorized to be about the same magnitude as solar oscillations. However, attempts to detect Jupiter’s global oscillations in the 80s and 90s were largely unsuccessful.
Light Echoes: Cosmic Records of Historical Supernovae
If you’ve ever given a speech or played sports inside of a cavernous gymnasium, you are well familiar with how sound can reflect off of the walls and cause an echo. Interestingly, this phenomenon also occurs on cosmic scale–not just with pressure waves like sound (or shocks), but with light.
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