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Galactic center

This tag is associated with 9 posts

Seeing Black Holes with a Gas Cloud

The gas cloud G2 is rapidly approaching the galactic center. Can tidal disruption events with stellar remnants help constrain its orbit?

Probing the Ionization Rate of Molecular Hydrogen Near the Galactic Center

In this article, the authors measure the cosmic ray ionization rate within a few parsecs of the galactic center. They find that the cosmic ray ionization rate is an order of magnitude larger than the galactic standard and also that the molecular gas near the galactic center is much warmer than the typical galactic molecular cloud.

CMZ termination shock

Blowing Bubbles from Our Galaxy

What causes the giant radio and gamma-ray bubbles inflated from our galactic center? This paper provides another good argument for star formation as the culprit.

The Infamous Galactic Center Source G2: Gas Cloud or Star?

In this paper, the authors use near-IR imaging and spectroscopy to determine if G2, a galactic center source about to approach our galaxy’s supermassive black hole, is a gas cloud or a star.

No jets in the Galactic center?

Carretti and collaborators have found new evidence that the gigantic bubbles of emission emanating from the center of our Milky Way are the result of winds from supernova explosions, not jets from our supermassive black hole.

Sgr A*: A flickering black hole

Witzel et. al examine the statistical properties of the photometric variability of our Galaxy’s central black hole.

Proto-planetary disk distorted by black hole

An Unlikely Planetary Nursery

Paper Title: Disruption of a Proto-Planetary Disk by the Black Hole at the Milky Way Centre Authors: Murray-Clay, R. A. and Loeb, A. Institution: Harvard-Smithsonian Center for Astrophysics (CfA) If our solar system lives in suburbia, the center of our galaxy is a sprawling metropolis shining bright for all to see. The center of our […]

Forever feeding Sgr A*

Recent studies have revealed a surprising amount of activity happening in the heart of our own Milky Way. In this paper, Liu et al. explore the kinematics of the gas outside the most central regions of our galaxy, and reveal that the Galactic center is being fed even more material from the main structure of the Milky Way.

Star formation in the Galactic Center

The Center of our Galaxy is one of the most extreme dynamical environments we can observe in detail because individual stars can actually be resolved using adaptive optics. Over time, monitoring individual stellar orbits has firmly established the presence of a supermassive black hole of about 4 x 106 M☉ (check out this video too). Further examination of these fast-moving stars’ properties (via infrared spectroscopy) revealed a surprising detail — many of these stars are young!

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