I am sharing this 'as-is' the original fediverse post text is quoted below along with a link to the article.

A pair of X-ray telescopes have observed the messy aftermath of a star that came too close to a supermassive black hole 290 million light-years away. It's believed that the star had three times the mass of the Sun, so this was one of the largest tidal disruption events ever seen. Although the black hole consumed some of the star, most of its guts were thrown into the surrounding space, polluting the region with the chemicals that allowed astronomers to estimate its stellar mass.

• Article

Tags

#Science,#Astronomy,#Xray,#SuperMassive,#Blackhole

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On the 16th January there were two interesting posts from Omnium Gatherum to the fediverse regarding Neutron stars.

Fedi id: @omniumgatherum@hrmtc.io

Neutron Star Merger Simulation with Gamma-ray Observations

NASA’s Retired Compton Mission Reveals Superheavy Neutron Stars

Other Links * NASA * NASA Article * Science Forums

Tags

#NASA,#Space,#Astronomy.#Stars,#Neutron,#NeutronStars,#Merger, #Supermassive

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Citation

Angelo Ricarte, Michael Tremmel, Priyamvada Natarajan, Charlotte Zimmer, Thomas Quinn, Origins and demographics of wandering black holes, Monthly Notices of the Royal Astronomical Society, Volume 503, Issue 4, June 2021, Pages 6098–6111, https://doi.org/10.1093/mnras/stab866

From what I have managed to read on this, very interesting, there is so much out there yet to discover. Would be great to get access to the above paper, I will ask on the Open University forums if I have access given I am Alumni.

It does highlight the need for open access to science journals. A few posts on this coming up.

Links

• Article
• ScienceAlert
  • Paper

Tags

#Rogue,#Wanderer,#Supermassive,#Blackholes,#Astronomy, #Physics

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So following on from the post on December 1st this is a quick review of the active galaxies lecture from the Space Telescope Science Institute.

This lecture, presented by Dr Mitchell Revalski, is really interesting, looking at how supermassive black holes, despite their small size compared to the galaxy they reside in.

Energy from these can push away surrounding gas, and heat this up which reduces star formation as gas needs to cool to form stars.

so scales are pretty huge:

First lets look at what a light year is

Citation : spaceplace.nasa.gov

For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it! 

1 pc = 1 parsec = 3.26 light years

Supermassive black hole < 1pc

Bulge = 1 = 3 kpc (kilo parsec)

disk 30 kpc

circumgalactic area 50kpc

So even though these black holes are very small, they have a big influence on what surrounds them.

We know this is happening thanks to the research that led to the 2020 Nobel prize.

Well worth watching and the link is above.

Next lecture 19th Jan – The Darkest Secrets of the Universe Speaker: Raja Guhathakurta (UC Santa Cruz)

#astronomy,#science,#space,#telescope,#scsci,#talk, #solarsystem,#galaxy,#blackhole,#supermassive,#stars, #gravity,#light,#matter,#atoms,#emissions,#aabsorption, #spectrum,#gamma,#xray,#visible,#invisible,#parsec, #lightyear,#distance,#galactic,#bulge,#spacetelescope, #groundtelescope,#astronomers,#education,#public

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