supermassive black holes

This tag is associated with 15 posts

Chandra Observes Sgr A* Rejecting Material

Sgr A* – the supermassive black hole sitting in the center of the Milky Way – is often referred to as a ‘starved’ black hole, meaning that it swallows very little of the nearby cosmic gas and dust. The authors of this paper observed Sgr A* with the Chandra X-ray telescope for 3 mega seconds, throughout which only 1% of the gas available to Sgr A* actually accreted onto the black hole. It swallows cold gas, while rejecting hot gas – ejecting the matter back into space.

More hypervelocity stars are jetting out of the galaxy

Palladino et al. find 13 new hypervelocity star candidates in the galaxy and find they probably do not originate from the center of the galaxy.

Another hungry black hole devours a star

Maksym et al. investigate a possible tidal flare event in Abell 1795.

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.

When a Black Hole Stops Being Hungry

New Observations suggest that we may have just witnessed the relativistic jet associated with the tidal disruption event Sw 1644+57 (first observed in March of 2011) turn off.

NGC 1277 as seen by Hubble

Introducing: The Over-massive Black Hole

Weighing in at 17 billion solar masses, NGC 1277 contains the largest black hole discovered to date. What makes this black hole exceptional it not just its size, but also that it does not seem to follow the relationship between most supermassive black holes and their host galaxies known as the M-sigma relation. The author’s discuss their findings and possible implications.

Where do supermassive black holes come from?

We know most galaxies host supermassive black holes at their centers, but how do they get so big? In this study, the authors investigate one of the smallest known supermassive black holes (weighing in at only 100,000 solar masses), to shed some light on what a young, accreting black hole might look like.

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 […]

A Star Screams While Being Devoured by Black Hole

If there was a cosmic play with the universe as its stage and the celestial bodies as its actors, undoubtedly there would be one character more notorious than the rest; a villain feared by all: the infamous Black Hole. They are truly the things of nightmares, and for one little star out there, that nightmare came true.

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.

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