This tag is associated with 212 posts

Dust gets interesting

Thought dust could only bore you? Think again: it may obscure our view of time’s very beginning!

Searching for Galaxy Clusters with the SZ Effect

The Sunyaev-Zeldovich effect is a unique way of searching for galaxy clusters that complements multi-wavelength imaging efforts.

The first discovery of a Thorne–Żytkow Object?

For the first time, astronomers have announced a Thorne–Żytkow Object candidate- a bizarre system in which a neutron star is surrounded by an envelope of stellar material.

Gamma rays: a window to the first stars?

The longest-lasting, most energetic explosions in the universe might occur in rare stars very similar to the very first stars to form in the universe.

Can gamma ray bursts be used as standard candles?

Some GRB-SNe pairs show interesting correlations across their light curves.

Piecing together the Hubble constant

Different methods of measuring the Hubble constant yield slightly different values, but they are still in reasonable agreement.

A new method for cosmic distances: using active galactic nuclei

Time delays in the light from AGNs’ dusty torii can tell us the intrinsic luminosity and hence the distance to the AGN.

Testing the Titius-Bode law on exoplanets

From examining extrasolar planetary systems, we can test if the Titius-Bode “law” is actually a law.

Binary Hunting with Phase Variations

How do pulsating stars give away their secret identities as binary dance partners? In this paper, the authors demonstrate a new way to not only detect binaries we may have missed in the Kepler data, but also to measure their velocities without spectra.

Kepler Discovers a Self-Lensing Star System

Kepler finds the signature of a transiting white dwarf. Instead blocking the light of its companion star, the white dwarf magnifies it, creating a light curve that periodically brightens.

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