Radio Galaxy Zoo Talk

Suppression of star formation in early-type galaxies by feedback from supermassive black holes

  • 42jkb by 42jkb scientist, admin

    An article by one of our scientists discusses the interaction between the supermassive black holes and star-formation within galaxies. The supermassive black holes that are in RGZ will expand on this study to help us understand the causal link between black holes and their host galaxies.

    Suppression of star formation in early-type galaxies by feedback from supermassive black holes by K. Schawinski et al. (2006)

    Posted

  • JeanTate by JeanTate in response to 42jkb's comment.

    The paper itself is behind a paywall (I do hope no zooite shelled out their own money for access! 😮).

    Here is a link to the preprint abstract: http://arxiv.org/abs/astro-ph/0608517

    There is the following text in the Comments on that page: "Nature, in press. 27 pages, 4 Figures. Article & supplements with high-resolution figures can be downloaded at: this http URL" this http URL is http://www-astro.physics.ox.ac.uk/~kevins/PAPERS/AGN_feedback.pdf However, clicking it gives "The requested URL /~kevins/PAPERS/AGN_feedback.pdf was not found on this server."

    You can get a PDF version of the preprint by clicking on the "PDF" link in the right-hand panel, under "Download:" I do not know how this differs from the published version (other than, I guess, the obvious typos being fixed); however, the figures have poor resolution.

    Posted

  • 42jkb by 42jkb scientist, admin

    Sorry that the paper is behind a pay wall. Here is the link that shouldn't be a paywall.

    http://arxiv.org/abs/astro-ph/0608517

    Posted

  • planetaryscience by planetaryscience

    a link to a comment from the GZ forum mainly because I don't want to have to rewrite the entire thing here: http://www.galaxyzooforum.org/index.php?topic=281941.msg661611#msg661611

    Posted

  • JeanTate by JeanTate in response to planetaryscience's comment.

    Welcome planetaryscience!

    Here's your comment:

    I've noticed that a large portion of the sources for radio emission in RGZ are from distant quasars rather than nearby ellipticals or spirals as we would expect. Sine so many of these distant objects seem to increase in average radio emission the further out they are, I think it might be safe to assume that, bringing together rick's topic of whether QSOs are first generation events, and I would say for a small degree of certainty, yes. You find many quasars around Z=1+, several billion light-years away, yet in your picture of a nearby spiral and another spiral ~7x further out, you find that the spiral has much less emission than the other, more distant, galaxy, which in turn has much, much less emission than the nearly-invisible distant quasar. Frankly, I think that galaxies have some sort of material that early-stage black holes feed off of, possibly hydrogen, that early galaxies will shoot of extreme amounts of early in their life, sort of as a christening of a new galaxy if you will. Images of ours and other galaxies show there to be a cavity of gas and absence of stars in close vicinity to a supermassive black hole, and it's typically thought to be caused by the 'wind' emitted from it, but could it simply be the absence of gas that was pulled into the black hole early in its life, and later pushed out? These are all just speculation based on a small amount of observation, but it's possible some of this could have some real scientific grounding, and is something to be considered.

    May I ask, what does this have to do with the Schawinski+ 2006 paper (that is the topic of this thread)?

    Posted