How we caught a glimpse of a supermassive black hole having a meal – The Conversation

Galaxy clusters such as Abell 2597 build up an extremely hot plasma around them, which some predict can gradually cool and rain down to feed the central supermassive black hole. We know from previous work that the black hole in this object is currently devouring material, so it seemed like an excellent place to look if we wanted to find out what it had on the menu.
To our delight we found the signatures of three cold clouds, backlit against the light emitted from the compact jets around the central black hole. We were able to determine that these clouds are within 350 light years of the black hole itself, and rushing towards it at over 537,000 miles an hour – essentially teetering on the edge of being devoured.

Each of these clouds is around a million times more massive than our sun and thus provides a significant snack, even for a very large black hole. While ALMA was only able to detect these three clouds, there may be thousands like them in the vicinity, which are not backlit by the bright jet.

Commenter Ignore Button by CK's Plug-Ins

Leave a Reply

Your email address will not be published. Required fields are marked *

*

Related

Noted & Quoted

TV pundits and op-ed writers of every major newspaper epitomize how the Democratic establishment has already reached a consensus: the 2020 nominee must be a centrist, a Joe Biden, Cory Booker or Kamala Harris–type, preferably. They say that Joe Biden should "run because [his] populist image fits the Democrats’ most successful political strategy of the past generation" (David Leonhardt, New York Times), and though Biden "would be far from an ideal president," he "looks most like the person who could beat Trump" (David Ignatius, Washington Post). Likewise, the same elite pundit class is working overtime to torpedo left-Democratic candidates like Sanders.

For someone who was not acquainted with Piketty's paper, the argument for a centrist Democrat might sound compelling. If the country has tilted to the right, should we elect a candidate closer to the middle than the fringe? If the electorate resembles a left-to-right line, and each voter has a bracketed range of acceptability in which they vote, this would make perfect sense. The only problem is that it doesn't work like that, as Piketty shows.

The reason is that nominating centrist Democrats who don't speak to class issues will result in a great swathe of voters simply not voting. Conversely, right-wing candidates who speak to class issues, but who do so by harnessing a false consciousness — i.e. blaming immigrants and minorities for capitalism's ills, rather than capitalists — will win those same voters who would have voted for a more class-conscious left candidate. Piketty calls this a "bifurcated" voting situation, meaning many voters will connect either with far-right xenophobic nationalists or left-egalitarian internationalists, but perhaps nothing in-between.

Comment →

Understanding Trump’s charisma offers important clues to understanding the problems that the Democrats need to address. Most important, the Democratic candidate must convey a sense that he or she will fulfil the promise of 2008: not piecemeal reform but a genuine, full-scale change in America’s way of thinking. It’s also crucial to recognise that, like Britain, America is at a turning point and must go in one direction or another. Finally, the candidate must speak to Americans’ sense of self-respect linked to social justice and inclusion. While Weber’s analysis of charisma arose from the German situation, it has special relevance to the United States of America, the first mass democracy, whose Constitution invented the institution of the presidency as a recognition of the indispensable role that unique individuals play in history.

Comment →

[E]ven Fox didn’t tout Bartiromo’s big scoops on Trump’s legislative agenda, because 10 months into the Trump presidency, nobody is so foolish as to believe that him saying, “We’re doing a big infrastructure bill,” means that the Trump administration is, in fact, doing a big infrastructure bill. The president just mouths off at turns ignorantly and dishonestly, and nobody pays much attention to it unless he says something unusually inflammatory.On some level, it’s a little bit funny. On another level, Puerto Rico is still languishing in the dark without power (and in many cases without safe drinking water) with no end in sight. Trump is less popular at this point in his administration than any previous president despite a generally benign economic climate, and shows no sign of changing course. Perhaps it will all work out for the best, and someday we’ll look back and chuckle about the time when we had a president who didn’t know anything about anything that was happening and could never be counted on to make coherent, factual statements on any subject. But traditionally, we haven’t elected presidents like that — for what have always seemed like pretty good reasons — and the risks of compounding disaster are still very much out there.

Comment →
CK's WP Plugins

Categories

Extraordinary Comments

CK's WP Plugins