Year: 2022

“RADIO JETS from active galactic nuclei (AGNs) are thought to play a key role in the coevolution of supermassive black holes and their host galaxies, as well as in the early growth of massive black holes.” https://lnkd.in/ds58Spd View in LinkedIn

QUIET QUASARS. “Yet, strong radio emission seems to be a rare or at least short-lived phenomenon. Only about 10% of all quasars are strong radio emitters, almost independent of their redshifts up to z ~ 6.” https://lnkd.in/ds58Spd View in LinkedIn

LOUD QUASARS, “Radio-loud sources at the highest accessible redshifts are of particular interest for multiple reasons. For example, radio galaxies are known to be good tracers of overdense environments, and at high redshift these overdensities could be the progenitors of the galaxy clusters seen in the present-day universe.” https://lnkd.in/ds58Spd View in LinkedIn

QUASARS AND DARK MATTER. “Furthermore, radio-loud sources deep in the epoch of reionization would enable crucial absorption studies of the intergalactic medium (IGM) at this critical epoch and they could potentially also constrain the nature of dark matter particles by detecting neutral hydrogen in absorption in the radio spectrum.” https://lnkd.in/ds58Spd View in LinkedIn

EXPANDING KNOWLEDGE. “The number of astronomical objects known within the first billion years of the universe has increased dramatically over the last few years, with galaxies being discovered up to z ~ 11 and quasars up to z ~ 7.5.” https://lnkd.in/ds58Spd View in LinkedIn

RARE COMBO. “On the other hand, identifying strong radio emitters at high redshift has been difficult. The highest-redshift radio galaxy lies at z = 5.7, with the previous record at z = 5.2. Out of the 200 published quasars at z > 6, only three are known to be radio-loud.” https://lnkd.in/ds58Spd View in LinkedIn

“LANGUAGE flows like a stream from distant sources of the early Stone Age, connecting our mind with the mind of our ancestors...[but] we do everything possible to forget the messages that come to us from the past.” Theodore Thepienemann-Thass (1967) The Subconscious Language. https://lnkd.in/dpZWtHc View in LinkedIn

Classic sleepy town in the summer heat (Portbo, Catalonia). View in LinkedIn

FEW RADIO-LOUD QUASARS. “For the large majority of the remainder, the existing radio data are too shallow to robustly classify them as radio-quiet or radio-loud, although there are on-going efforts to obtain deeper radio observations of these objects.” https://lnkd.in/ds58Spd View in LinkedIn

THREE SO FAR. “The three z > 6 radio-loud quasars currently known, listed by increasing redshift, are: J0309+2717 at z = 6.10, J1427+3312 at z = 6.12, and J1429+5447 at z = 6.18.” https://lnkd.in/ds58Spd View in LinkedIn