karinavoggel - Network

So I'd say I am super sceptical on their deduced SMBH redshift evolution based on vastly different samples of SMBHs measured with vastly...

So I'd say I am super sceptical on their deduced SMBH redshift evolution based on vastly different samples of SMBHs measured with vastly different techniques. And on that one sample selection they base their grande conclusion of SMBHs being dark energy 😳

As usual the only conclusion I am getting is: exceptional claims need exceptional evidence. And based on that sample I am not even remotely convinced SMBHs are dark energy.

But the weirdest assumption of all is this one below. They assume almost no SMBH mass evolution from redshift 2 to today for Ellipticals....

But the weirdest assumption of all is this one below. They assume almost no SMBH mass evolution from redshift 2 to today for Ellipticals. The paper only seems to consider SMBHs grow from gas accretion (which is not true).

A former galaxy nuclei with a SMBHs can still merger into the center of a giant Elliptical long after the direct tidal features have resolved. This is also not tracked by cosmological simulations very well & thus they are not a good reference here.

What I find super worrisome though is that they used vastly different samples for this comparison. And while they try to account for those...

What I find super worrisome though is that they used vastly different samples for this comparison. And while they try to account for those it remains that high-redshift SMBH mass measurements ALL depend on the low-redshift direct stellar dynamical ones.

This is via the viral factor f that all high-redshift mass measurements use and its *calibrated* to low redshift direct stellar dynamical mass measurements.

OK I read the first paper that says the location of galaxies on the BH-Stellar mass relation changed with redshift. Thus they say you need...

OK I read the first paper that says the location of galaxies on the BH-Stellar mass relation changed with redshift. Thus they say you need an offset in SMBH mass that the blue & orange high redshift samples are consistent with the (red) local Universe ones.

So just came across this press release that claims super-massive black holes are the source of dark energy? Ummm whut? Thought this is some...

So just came across this press release that claims super-massive black holes are the source of dark energy? Ummm whut? Thought this is some misinformation but its actually based on two ApJ papers.

https://www.imperial.ac.uk/news/243114/scientists-find-first-evidence-that-black/

These are the source papers:
https://iopscience.iop.org/article/10.3847/1538-4357/acac2e
https://iopscience.iop.org/article/10.3847/2041-8213/acb704

I just learned about this paper on the new closest SMBH/AGN pair that was shown at the #AAS241 and highlighted in a press release.Absolutely...

I just learned about this paper on the new closest SMBH/AGN pair that was shown at the #AAS241 and highlighted in a press release.

Absolutely shocked by how the author do not even CITE the only previously known SMBH pair at sub-kpc separation. At this point its so flagrant I can only assume its intentional.

https://iopscience.iop.org/article/10.3847/2041-8213/aca8f0

Is my placebo playlist trying to give me subtle hints about this academic application season or am I just projecting 👀 🤔

Is my placebo playlist trying to give me subtle hints about this academic application season or am I just projecting 👀 🤔

And yes the building in the background is the European Parliament here in Strasbourg.

And yes the building in the background is the European Parliament here in Strasbourg.

Happy Winter solistice!The sun greeted me on my lunch run today but even then it’s not very high above the horizon anymore. So happy there...

Happy Winter solistice!

The sun greeted me on my lunch run today but even then it’s not very high above the horizon anymore. So happy there are longer days coming 😊
We went from a polar vortext deep freeze to what feels like spring weather in 48 hours.

Wait does Mastodon not do cite tweets where the original tweet gets displayed?

Wait does Mastodon not do cite tweets where the original tweet gets displayed?

She mostly watches the birds on the tree in front of that window. 😸 https://astrodon.social/@bether/109540096986414585

She mostly watches the birds on the tree in front of that window. 😸
https://astrodon.social/@bether/109540096986414585

The hardest part about applying for academic jobs is to convey full confidence when you’ve lost all hope. Merry application season to me...

The hardest part about applying for academic jobs is to convey full confidence when you’ve lost all hope. Merry application season to me 😒

If you have a iPhone what app do you prefer for mastodon?ToootMetatextMastodon App

If you have a iPhone what app do you prefer for mastodon?

Tooot
Metatext
Mastodon App

Twitter feels so icky these days I am glad we have this new corner here on mastodon but so far I am still using it less than twitter. Any...

Twitter feels so icky these days I am glad we have this new corner here on mastodon but so far I am still using it less than twitter. Any recs for iOS mastodon apps that are good? I have none yet.

And excuse my empty Profile picture but currently mastodon is not allowing me to upload any so I am stuck with the standard avatar. Still...

And excuse my empty Profile picture but currently mastodon is not allowing me to upload any so I am stuck with the standard avatar. Still better than being trapped in the M**k tweetverse forever.

So is this thing working? Let's do a quick #astrodon #instroduction shall we? I am an astronomer working on nuclear star clusters and...

So is this thing working? Let's do a quick #astrodon #instroduction shall we? I am an astronomer working on nuclear star clusters and their supermassive black holes. I am currently based in Strasbourg France. In my free time I am an avid runner and have completed several marathons!