Tootfinder

Polluting White Dwarfs with Oort Cloud Comets
Dang Pham, Hanno Rein
https://arxiv.org/abs/2404.07160 https://arxiv.org/pdf/2404.07160…

Polluting White Dwarfs with Oort Cloud Comets
Observations point to old white dwarfs (WDs) accreting metals at a relatively constant rate over 8~Gyrs. Exo-Oort clouds around WDs have been proposed as potential reservoirs of materials, with galactic tide as a mechanism to deliver distant comets to the WD's Roche limit. In this work, we characterise the dynamics of comets around a WD with a companion having semi-major axes on the orders of 10 - 100 AU. We develop simulation techniques capable of integrating a large number ($10^8$) of objects…

Heute ist #gameday in der #ErimaGFL - Den Auftakt machen die Royals vs Invaders und Baltic Hurricanes vs Lions um 16:00 Uhr, die Spiele Unicorns vs Comets und Spiders vs Cowboys starten um 17:00 Uhr. In Paderborn spielen dann Dolphins vs Monarchs um 19:00 Uhr. Damit ist dann der erste Spieltag auch „in…

🔊 #NowPlaying on BBCRadio2's #SoundsOfThe60sWithTonyBlackburn
Bill Haley and His Comets:
🎵 Rock Around The Clock
#BillHaleyandHisComets
https://open.spotify.com/track/34AmZ4PMz9iNZVp9AMIGZj
https://invasivesound.bandcamp.com/track/bill-haley-his-comets-rock-around-the-clock

Multi-purpose InSTRument for Astronomy at Low-resolution: MISTRAL@OHP
J. Schmitt, C. Adami, M. Dennefeld, F. Agneray, S. Basa, J. C. Brunel, V. Buat, D. Burgarella, C. Carvalho, G. Castagnoli, N. Grosso, F. Huppert, C. Moreau, F. Moreau, L. Moreau, E. Muslimov, S. Pascal, S. Perruchot, D. Russeil, J. L. Beuzit, F. Dolon, M. Ferrari, B. Hamelin, A. LevanSuu, K. Aravind, D. Gotz, E. Jehin, E. LeFloc'h, J. Palmerio, A. Saccardi, B. Schneider, F. Sch\"ussler, D. Turpin, S. D. Verg…

Multi-purpose InSTRument for Astronomy at Low-resolution: MISTRAL@OHP
MISTRAL is the new Faint Object Spectroscopic Camera mounted at the folded Cassegrain focus of the 1.93m telescope of Haute-Provence Observatory. We describe the design and components of the instrument and give some details about its operation. We emphasise in particular the various observing modes and the performances of the detector. A short description is also given about the working environment. Various types of objects, including stars, nebulae, comets, novae, galaxies have been observed d…

This https://arxiv.org/abs/2403.02258 has been replaced.
link: https://scholar.google.com/scholar?q=a

Atacama Large Aperture Submillimeter Telescope (AtLAST) Science: Planetary and Cometary Atmospheres
The study of planets and small bodies within our Solar System is fundamental for understanding the formation and evolution the Earth and other planets. Compositional and meteorological studies of the giant planets provide a foundation for understanding the nature of the most commonly observed exoplanets, while spectroscopic observations of the atmospheres of terrestrial planets, moons, and comets provide insights into the past and present-day habitability of planetary environments, and the avai…

🔊 #NowPlaying on fip
Bill Haley & The Comets:
🎵 Rock around the clock
#BillHaley #TheComets
https://open.spotify.com/track/34AmZ4PMz9iNZVp9AMIGZj
https://deejayovi-redrums.bandcamp.com/track/bill-haley-his-comets-rock-around-the-clock-deejayovi-redrum

Cosmic cleaners: the scientists scouring English cathedral roofs for space dust
It was thought to be impossible to collect cosmic dust in the urban environment – it was confined to pristine places, such as the Antarctic, or in fossilised sediment. But in 2009, Norwegian jazz musician turned cosmic dust hunter Jon Larsen began combing through hundreds of kilograms of urban dust particles, searching for cosmic dust. In 2017, Larsen and colleagues, including Van Ginneken, published a semi…

On April 12, 1954, Bill Haley and His Comets record “(We're Gonna) Rock Around The Clock.” If rock and roll was a social and cultural revolution, then “(We're Gonna) Rock Around The Clock” was its Declaration of Independence
@…

Yay, picked #comet #12P #PonsBrooks out of super-bad skies over #Bochum, Germany, with a #superzoom camera - on a tripod with a few seconds exposure - an hour ago. According to https://cobs.si/obs/comet/484/ the total coma magnitude is ~5.9 right now. 11x70 binoculars, normally quite good with comets, showed exactly nothing in this "sky" with a naked-eye limiting magnitude of ~2.3 - but the €300 camera saved the day, err, evening. 12P could get another 2.5 mag. = a factor 10 brighter: yes, please ...!

A link between the size and composition of comets
James E. Robinson, Uri Malamud, Cyrielle Opitom, Hagai Perets, J\"urgen Blum
https://arxiv.org/abs/2403.15644

A link between the size and composition of comets
All cometary nuclei that formed in the early Solar System incorporated radionuclides and therefore were subject to internal radiogenic heating. Previous work predicts that if comets have a pebble-pile structure internal temperature build-up is enhanced due to very low thermal conductivity, leading to internal differentiation. An internal thermal gradient causes widespread sublimation and migration of either ice condensates, or gases released from amorphous ice hosts during their crystallisation…

A broken debris cascade as a possible source of hot dust emission in transitioning planet-forming disks
Niels Swinkels, Carsten Dominik
https://arxiv.org/abs/2404.17816

A broken debris cascade as a possible source of hot dust emission in transitioning planet-forming disks
Planet-forming disks turn from gas-rich, massive disks made of dust and gas into planetary systems containing only small amounts dust produced by collisions between smaller planetary objects like planetesimals, asteroids, or comets. Traditionally we talk about protoplanetary (age $\sim$1 Myr), transitional ($\sim$ 5-10 Myr), and debris disks ($\sim$ 10-hundreds of Myr), even though the overlap between these phases may be relevant. We aim to show that in the transition phase of a disk, when gas …

Crash Chronicles: relative contribution from comets and carbonaceous asteroids to Earth's volatile budget in the context of an Early Instability
Sarah Joiret, Sean N. Raymond, Guillaume Avice, Matthew S. Clement
https://arxiv.org/abs/2403.08545

Crash Chronicles: relative contribution from comets and carbonaceous asteroids to Earth's volatile budget in the context of an Early Instability
Recent models of solar system formation suggest that a dynamical instability among the giant planets happened within the first 100 Myr after disk dispersal, perhaps before the Moon-forming impact. As a direct consequence, a bombardment of volatile-rich impactors may have taken place on Earth before internal and atmospheric reservoirs were decoupled. However, such a timing has been interpreted to potentially be at odds with the disparate inventories of Xe isotopes in Earth's mantle compared to i…

The Active Asteroids Citizen Science Program: Overview and First Results
Colin Orion Chandler, Chadwick A. Trujillo, William J. Oldroyd, Jay K. Kueny, William A. Burris, Henry H. Hsieh, Jarod A. DeSpain, Nima Sedaghat, Scott S. Sheppard, Kennedy A. Farrell, David E. Trilling, Annika Gustafsson, Mark Jesus Mendoza Magbanua, Michele T. Mazzucato, Milton K. D. Bosch, Tiffany Shaw-Diaz, Virgilio Gonano, Al Lamperti, Jos\'e A. da Silva Campos, Brian L. Goodwin, Ivan A. Terentev, Charles…

The Active Asteroids Citizen Science Program: Overview and First Results
We present the Citizen Science program Active Asteroids and describe discoveries stemming from our ongoing project. Our NASA Partner program is hosted on the Zooniverse online platform and launched on 2021 August 31, with the goal of engaging the community in the search for active asteroids -- asteroids with comet-like tails or comae. We also set out to identify other unusual active solar system objects, such as active Centaurs, active quasi-Hilda asteroids, and Jupiter-family comets (JFCs). Ac…