• When you’re a JET…

    No, not the West Side Story musical kind… (although they are awesome) The Jets gang from West Side Story.  So our research group is called Jetset. We work on trying to figure out the physical processes that launch jets of matter and light from (very close to) black holes.  So what are these jets actually? In the astrophysical sense, jets are linear beams of charged particles like protons and electrons (aka plasma) that are emitted along the rotation axis of an astrophysical object, like a black hole. Jets launched from black holes reach speeds close to the speed of light. These super fast moving outflows of plasma exhibit the effects…

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  • From BIG to small, accretion built them all

    Our research group is composed almost entirely of theorists. They create models and simulations, based on physics, to try to figure out how black holes work. I’m an observational astronomer, I gather data from telescopes and try to figure out how black holes (and neutron stars) work. The thing that we’re all trying to figure out is this process called accretion. In other words, the process by which black holes pull matter from their surroundings or a companion star into themselves via gravity. This process increases the black hole mass, powers its rotation and is linked to the launching of jets of matter and light from around black holes. In…

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  • To be MAD or not to be MAD: problematic naming conventions in astronomy

    Last week’s blog post was entitled To be MAD or not to be MAD. In it, my colleague Doosoo Yoon did a good job of discussing two models used to describe the accretion disks of matter flowing onto a black hole. These models started a discussion in our research group meeting this week for a different reason: the names of the two models MAD and SANE are pretty ableist. As Doosoo pointed out, MAD stands for Magnetically Arrested Disk and SANE stands for Standard And Normal Evolution. Now the MAD model which was created first, about 20 years ago, has a simple acronym and is widely used in the astronomy…

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