Stellar remains of 1987 supernova found at last
Tue 27 Feb 13:00: Protoplanetary disc: what can we learn by combining theory and observations?
Protoplanetary discs serve as the cradle for planetary formation and evolution. It is then fundamental to study their evolution to gain a comprehensive understanding of exoplanetary system formation. These discs can be studied using two distinct approaches.
On one side, they can be analysed as a set of single sources, allowing for a detailed analysis of the mechanisms behind the diversity of observed morphologies using gas and dust tracers such as rings, gaps and asymmetries.
On the other side, it is crucial to study star-forming regions, understanding which physical processes are governing the global disc evolution.
In this talk, I will firstly describe results from the modelling of single sources, underlining the information we can obtain by comparing multi-wavelengths observations with results from the hydrodynamical models of specific sources (e.g., HD169142 , PDS70, GG Tau A). In particular, I will focus on how simulations can help in constraining the mass and position of the candidate proto-planets that may be responsible for the ALMA and SPHERE observational results, as well as how they can support future observational strategies.
I will then summarize some of the results obtained by testing disc evolution models by comparing them with the Lupus star forming region. In these works, we tested the secular evolution of the observed dust and gas radius of disc populations and their ratio, to test the efficiency of radial drift and the viscous evolution theory.
- Speaker: Claudia Toci (ESO)
- Tuesday 27 February 2024, 13:00-14:00
- Venue: Ryle seminar room + ONLINE - Details to be sent by email.
- Series: Exoplanet Seminars; organiser: Dr Emily Sandford.
Distinguishing oceans of water from magma on mini-Neptune K2-18b
Tue 27 Feb 11:15: Real-time pipelines for SKA — Progress and challenges
The Square Kilometre Array (SKA) will be the largest interferometric radio telescope to date, with unprecedented resolution and sensitivity to study various phenomena of the universe. In data processing pipelines for radio telescopes, real time calibration, such as beam former and pointing offset calibration, are crucial for obtaining high-quality interferometric data from the observations. As an example, I will discuss the design and ongoing implementation of the pointing offset calibration pipeline within SKA ’s data processing software, describing the steps carried out to integrate the pipeline into telescope execution control and data queue system, as well as outlining challenges and greater implications on the data processing algorithm and software within the radio astronomy community.
- Speaker: Dr. Ying-He Celeste Lü (Cavendish Astrophysics)
- Tuesday 27 February 2024, 11:15-12:00
- Venue: Coffee area, Battcock Centre.
- Series: Hills Coffee Talks; organiser: Charles Walker.
How AI is helping the search for extraterrestrial life
Rare isotopes formed in prelude to γ-ray burst
Nature, Published online: 21 February 2024; doi:10.1038/d41586-024-00310-6
The afterglow of a long burst of γ-rays suggests that the events leading to these explosions can be sizeable sources of some of the Universe’s rare isotopes — and that classifications of γ-ray bursts are too simplistic.A lanthanide-rich kilonova in the aftermath of a long gamma-ray burst
Nature, Published online: 21 February 2024; doi:10.1038/s41586-023-06979-5
A modelling analysis shows that an unusually long gamma-ray burst gave rise to a lanthanide-rich kilonova following the merger of a neutron star–neutron star or of a neutron star–black hole.'Grandfather satellite' due to fall to Earth
Astronomers discover universe’s brightest object – a quasar powered by a black hole that eats a sun a day
Light from the celestial object, which is 500tn times brighter than our sun, travelled for more than 12bn years to reach Earth
- Follow our Australia news live blog for latest updates
- Get our morning and afternoon news emails, free app or daily news podcast
The brightest known object in the universe, a quasar 500tn times brighter than our sun, was “hiding in plain sight”, researchers say.
Australian scientists spotted a quasar powered by the fastest growing black hole ever discovered. Its mass is about 17bn times that of our solar system’s sun, and it devours the equivalent of a sun a day.
This article was amended to correct the size of the primary mirror of the European Southern Observatory’s Very Large Telescope, which is 8 metres, not 39m as previously stated.
Continue reading...The tidal deformation and atmosphere of WASP-12b from its phase curve
Galactic Archaeology with Gaia
Ashes to ashes, dust to dust: the cosmic fertiliser that fuelled the origins of life
The origin of life is an event so rare that, to the best of our knowledge, it has only happened once: here on Earth. The questions of how life developed and in what environments geochemical reactions took place are fundamental questions that span the fields of astrobiology, organic chemistry, and geology. One key...
Quantum computers are constantly hampered by cosmic rays
On the Ocean Conditions of Hycean Worlds
Cosmic dust fertilization of glacial prebiotic chemistry on early Earth
Mon 13 May 13:00: Title to be confirmed
Abstract not available
- Speaker: Jean-Luc Lehners (MPI for Gravitational Physics, Potsdam)
- Monday 13 May 2024, 13:00-14:00
- Venue: CMS, Pav. B, CTC Common Room (B1.19) [Potter Room].
- Series: Cosmology Lunch; organiser: Thomas Colas.