@_MarcoSimonte_

PhD student in astrophysics at @HambObs 🌌 📍Pordenone, Bologna 🇮🇹 📍Hamburg 🇩🇪

 Hamburg, Germany
Joined April 2021
  • Tweets20
  • Following74
  • Followers92
10Media
#paperday Aligned radio galaxies in the ELAIS-N1 field? Apparently no! Why is that important? Have a look at my new paper (arxiv.org/abs/2303.00773) 🧵
1
4
17
718
Pretty spiral galaxies that keep fooling a poor student looking for radio galaxies. I will present the catalogue of 1600+ radio galaxies I compiled in the @LOFAR Deep Fields at the next LOFAR Family Meeting #LFM23
1
18
577
Further, we proved that likely the alignment was not present in the TJ16 sample as well. In particular, we show that the redshift distribution of RGs spans a range between 0-1.5, strongly arguing against the idea of a 3D (i.e. physical) alignment.
1
2
85
The cosmology is safe (for now)! We can go back to the black holes as source of dark energy.
1
87
Delighted to share my first review paper on our understanding of #giant radio sources (#GRSs). It also highlights the importance of the @SKAO. Thanks @skaindia_epo for the opportunity. D.J Saikia @MousumiMahato10 @AstrophyJournal arxiv.org/abs/2208.02130
1
8
1
33
MarcoSimonte retweeted
Henrik Edler@hen_edler25 Jul 2022
Paper day! We studied the cluster Abell 1033 featuring the GReET, one of the steepest spectrum radio sources known. What happens if you observe the ultra-steep spectrum emission at ultra-low frequencies (54 MHz)? Find out in the paper! -> arxiv.org/pdf/2207.11040.pdf
1
6
1
28
Cluster community: we study the largest structures in the universe. GRG people: hold my beer. 70+ new very large radio galaxies in the Boötes field. Check them out! arxiv.org/abs/2207.01648 In collaboration with @HambObs et al. #paperday
1
7
31
1st and 2nd go to the University of Hamburg.
2
16
Just gave my first live talk on giant radio galaxies in the Boötes deep field at the LFM in Cologne. Such an amazing experience! #LFM22
11
German taster evening with fish 🐠 Brötchen, 🍺 and Aquavit ⁦@HambObs⁩
3
13
Some of the giant radio galaxies we found in the Boötes field. Soon.. 👀
4
60
Here is the press release on our recent paper " The Deepest Chandra View of RBS 797: Evidence for Two Pairs of Equidistant X-ray Cavities", published today on ApJ Letters: see iopscience.iop.org/article/1… 🎉🎉

The Deepest Chandra View of RBS 797: Evidence for Two Pairs of Equidistant X-ray Cavities

The Deepest Chandra View of RBS 797: Evidence for Two Pairs of Equidistant X-ray Cavities, Ubertosi, F., Gitti, M., Brighenti, F., Brunetti, G., McDonald, M., Nulsen, P., McNamara, B., Randall, S.,...

iopscience.iop.org
Chandra Observatory
@chandraxray16 Dec 2021
⚫⚫Two supermassive #BlackHoles, separated by only about 250 light years, may have erupted and generated jets at close to the same time! More on the discovery: chandra.harvard.edu/photo/20…
Two images of the same galaxy cluster, RBS 797, presented side-by-side. Left is an optical image from NASA’s Hubble Space Telescope. Right is an X-ray image from the Chandra X-ray Observatory. The optical image on features short streaks of golden light and golden stars of varying sizes set against a black background. While many of the stars resemble small roundish specks, others feature shafts of light bursting from brilliant, round cores. At the center of the image is a small fuzzy oval, surrounded by a glowing ring and a patch of golden haze. This is the large galaxy in the center of RBS 797. The X-ray image does not show the clustered galaxies, rather the hot gas that envelopes them. The image is royal blue in color, and somewhat mottled or cloudy. At the center is a pair of irregular black ovals, ringed with white and pale blue. These side-by-side shapes are X-ray cavities, thought to be a byproduct of eruptions from a giant black hole at the center of the cluster.

ALT Two images of the same galaxy cluster, RBS 797, presented side-by-side. Left is an optical image from NASA’s Hubble Space Telescope. Right is an X-ray image from the Chandra X-ray Observatory. The optical image on features short streaks of golden light and golden stars of varying sizes set against a black background. While many of the stars resemble small roundish specks, others feature shafts of light bursting from brilliant, round cores. At the center of the image is a small fuzzy oval, surrounded by a glowing ring and a patch of golden haze. This is the large galaxy in the center of RBS 797. The X-ray image does not show the clustered galaxies, rather the hot gas that envelopes them. The image is royal blue in color, and somewhat mottled or cloudy. At the center is a pair of irregular black ovals, ringed with white and pale blue. These side-by-side shapes are X-ray cavities, thought to be a byproduct of eruptions from a giant black hole at the center of the cluster.

2
3
1
14
#paperday: My first paper, in collaboration with @franco_vazza, @fabriziobrighe1, @HambObs and @MatteoAnge, is out! We used ENZO simulation to investigate whether density fluctuations can trace turbulent fluctuations in a stratified ICM. (arxiv.org/abs/2112.00774)
1
6
1
26
more replies
We did not find a strong relation between the density fluctuations and the Richardson number, which previous studies reported (arxiv.org/pdf/2001.06494.pdf).
2
3
The turbulent anisotropy parameter, β, shows the effects of radial accretion, which appears to be the dominant driver for the gas fluctuations in our simulations. As a consequence, the Richardson number does not act as a good proxy of the dynamics and gas fluctuations of the ICM.
3
Load more