New Study Addresses how Lunar Missions will Kick up Moondust. Before the end of this decade, NASA plans to return astronauts to the Moon for the first time since the Apollo Era. But this time, through the Artemis Program, it won’t be a “footprints and flags” affair. With other space agencies and commercial partners, the long-term aim is to create the infrastructure that will allow for a “sustained program of lunar exploration and development.” If all goes according to plan, multiple space agencies will have established bases around the South Pole-Aitken Basin, which will pave the way for lunar industries and tourism. For humans toRead More →

How Warm Are the Oceans on the Icy Moons? The Ice Thickness Provides a Clue. Scientists are discovering that more and more Solar System objects have warm oceans under icy shells. The moons Enceladus and Europa are the two most well-known, and others like Ganymede and Callisto probably have them too. Even the dwarf planet Ceres might have an ocean. But can any of them support life? That partly depends on the water temperature, which strongly influences the chemistry. We’re likely to visit Europa in the coming years and find out for ourselves how warm its ocean is. Others on the list we may neverRead More →

Wet Moons and Tippy landers This month our intrepid crew of the good ship Awesome investigate sub surface oceans on the moons of the solar system, smoking stars, distant blackholes, oversized structures and of course tippy over lunar landers. There is also the monthly skyguide and a look at the astro history of March! Awesome Astronomy Go to SourceRead More →

NASA Tests the New Starship Docking System The Apollo Program delivered 12 American astronauts to the surface of the Moon. But that program ended in 1972, and since then, no human beings have visited. But Artemis will change that. And instead of just visiting the Moon, Artemis’ aim is to establish a longer-term presence on the Moon. That requires more complexity than Apollo did. Astronauts will need to transfer between vehicles. All of that activity requires a reliable spacecraft docking system. When Artemis astronauts blast off from Earth, they’ll be in the four-seat Orion spacecraft. Orion will take them to lunar orbit, where two willRead More →

China Has Built a Huge Space Simulation Chamber Well it certainly caught my attention when I saw the headlines  “China’s first Space Environment Simulator” sounds like something right out of an adventure holiday. Whilst you can’t buy tickets to ‘have a go’ it’s actually for China to test spacecraft before launching them into the harsh environments of space. It allows researchers to simulate nine environmental factors; vacuum, high and low temperature, charged particles, electromagnetic radiation, space dust, plasma, weak magnetic field, neutral gasses and microgravity – and it even looks futuristic too! The Harbin Institute of Technology and the China Aerospace Science and Technology CorporationRead More →

Dynamics and potential origins of decimeter-sized particles around comet 67P/Churyumov-Gerasimenko Marius Pfeifer, Jessica Agarwal, Raphael Marschall, Bj"orn Grieger, Pablo Lemos arXiv:2402.18613v1 Announce Type: new Abstract: Methods. We algorithmically tracked thousands of individual particles through four OSIRIS/NAC image sequences of 67P’s near-nucleus coma. We then traced concentrated particle groups back to the nucleus surface, and estimated their potential source regions, size distributions, and projected dynamical parameters. Finally, we compared the observed activity to dust coma simulations. Results. We traced back 409 decimeter-sized particles to four suspected source regions. The regions strongly overlap and are mostly confined to the Khonsu-Atum-Anubis area. The activity may be linked toRead More →

How does the radio enhancement of broad absorption line quasars relate to colour and accretion rate? J. W. Petley, L. K. Morabito, A. L. Rankine, G. T. Richards, N. L. Thomas, D. M. Alexander, V. A. Fawcett, G. Calistro Rivera, I. Prandoni, P. N. Best, S. Kolwa arXiv:2402.18623v1 Announce Type: new Abstract: The origin of radio emission in different populations of radio-quiet quasars is relatively unknown, but recent work has uncovered various drivers of increased radio-detection fraction. In this work, we pull together three known factors: optical colour ($g-i$), CIV Distance (a proxy for $L/L_{Edd}$) and whether or not the quasar contains broad absorption linesRead More →

Using Rest-Frame Optical and NIR Data from the RAISIN Survey to Explore the Redshift Evolution of Dust Laws in SN Ia Host Galaxies Stephen Thorp, Kaisey S. Mandel, David O. Jones, Robert P. Kirshner, Peter M. Challis arXiv:2402.18624v1 Announce Type: new Abstract: We use rest-frame optical and near-infrared (NIR) observations of 42 Type Ia supernovae (SNe Ia) from the Carnegie Supernova Project at low-$z$ and 37 from the RAISIN Survey at high-$z$ to investigate correlations between SN Ia host galaxy dust, host mass, and redshift. This is the first time the SN Ia host galaxy dust extinction law at high-$z$ has been estimated using combinedRead More →

Probing the dust grain alignment mechanisms in spiral galaxies with M51 as the case study Enrique Lopez-Rodriguez, Le Ngoc Tram arXiv:2402.18628v1 Announce Type: new Abstract: Magnetic fields (B-fields) in galaxies have recently been traced using far-infrared and sub-mm polarimetric observations with SOFIA, JCMT, and ALMA. The main assumption is that dust grains are magnetically aligned with the local B-field in the interstellar medium (ISM). However, the range of physical conditions of the ISM, dust grain sizes, and B-field strengths in galaxies where this assumption is valid has not been characterized yet. Here, we use the well-studied spiral galaxy M51 as a case study. We findRead More →

ALMA view of the L1448-mm protostellar system on disk scales: CH$_3$OH and H$^{13}$CN as new disk wind tracers P. Nazari, B. Tabone, A. Ahmadi, S. Cabrit, E. F. van Dishoeck, C. Codella, J. Ferreira, L. Podio, {L}. Tychoniec, M. L. van Gelder arXiv:2402.18631v1 Announce Type: new Abstract: Protostellar disks are known to accrete, however, the exact mechanism that extracts the angular momentum and drives accretion in the low-ionization “dead” region of the disk is under debate. In recent years, magneto-hydrodynamic (MHD) disk winds have become a popular solution. Yet, observations of these winds require both high spatial resolution (${sim}10$s au) and high sensitivity, which hasRead More →

A toy model for gas sloshing in galaxy clusters Elke Roediger, Iraj Vaezzadeh, Paul Nulsen arXiv:2402.18632v1 Announce Type: new Abstract: We apply a toy model based on ‘pendulum waves’ to gas sloshing in galaxy clusters. Starting with a galaxy cluster potential filled with a hydrostatic intra-cluster medium (ICM), we perturb all ICM by an initial small, unidirectional velocity, i.e., an instantaneous kick. Consequently, each parcel of ICM will oscillate due to buoyancy with its local Brunt-V”ais”al”a (BV) period, which we show to be approximately proportional to the cluster radius. The oscillation of gas parcels at different radii with different periods leads to a characteristic, outwards-movingRead More →

Mass scaling relations for dark halos from an analytic universal outer density profile Giorgos Korkidis, Vasiliki Pavlidou arXiv:2402.18634v1 Announce Type: new Abstract: The average matter density within the turnaround scale, which demarcates where galaxies shift from clustering around a structure to joining the expansion of the Universe, is an important cosmological probe. However, a measurement of the mass enclosed by the turnaround radius is difficult. Analyses of the turnaround scale in simulated galaxy clusters place the turnaround radius at about three times the virial radius in a (Lambda CDM) universe and at a (present-day) density contrast with the background matter density of the Universe ofRead More →

El Gordo needs El Anzuelo: Probing the structure of cluster members with multi-band extended arcs in JWST data A. Galan, G. B. Caminha, J. Knollm"uller, J. Roth, S. H. Suyu arXiv:2402.18636v1 Announce Type: new Abstract: Gravitational lensing by galaxy clusters involves hundreds of galaxies over a large redshift range and increases the likelihood of rare phenomena (supernovae, microlensing, dark substructures, etc.). Characterizing the mass and light distributions of foreground and background objects often requires a combination of high-resolution data and advanced modeling techniques. We present the detailed analysis of El Anzuelo, a prominent quintuply imaged dusty star forming galaxy ($z_{rm s}=2.29$), mainly lensed by threeRead More →

Constraining the hadronic properties of star-forming galaxies above $1, rm GeV$ with 15-years Fermi-LAT data Antonio Ambrosone, Marco Chianese, Antonio Marinelli arXiv:2402.18638v1 Announce Type: new Abstract: Star-forming and starburst galaxies (SFGs and SBGs) are considered to be powerful emitters of non-thermal gamma-rays and neutrinos. On this regard, the Fermi-LAT collaboration has found a correlation between the gamma-ray and infrared luminosities for a sample of local sources. Yet, the physics behind these non-thermal emissions is still under debate. Using the publicly-available fermitools, we analyse 15.3 years of gamma-ray between 1-1000 GeV data for 70 sources, 56 of which were not previously detected. We relate this emissionRead More →

Chemical Diagnostics to Unveil Environments Enriched by First Stars Irene Vanni, Stefania Salvadori, Valentina D’Odorico, George D. Becker, Guido Cupani arXiv:2402.18640v1 Announce Type: new Abstract: Unveiling the chemical fingerprints of the first (Pop III) stars is crucial for indirectly studying their properties and probing their massive nature. In particular, very massive Pop III stars explode as energetic Pair-Instability Supernovae (PISNe), so their chemical products might escape in the diffuse medium around galaxies, opening the possibility to observe their fingerprints in distant gas clouds. Recently, three z > 6.3 absorbers with abundances consistent with an enrichment from PISNe have been observed with JWST. In this Letter,Read More →

The DESI Early Data Release White Dwarf Catalogue Christopher J. Manser, Paula Izquierdo, Boris T. G"ansicke, Andrew Swan, Detlev Koester, Akshay Robert, Siyi Xu, Keith Inight, Ben Amroota, N. P. Gentile Fusillo, Sergey E. Koposov, Bokyoung Kim, Arjun Dey, Carlos Allende Prieto, J. Aguilar, S. Ahlen, R. Blum, D. Brooks, T. Claybaugh, A. P. Cooper, K. Dawson, A. de la Macorra, P. Doel, J. E. Forero-Romero, E. Gazta~naga, S. Gontcho A Gontcho, K. Honscheid, T. Kisner, A. Kremin, A. Lambert, M. Landriau, L. Le Guillou, Michael E. Levi, T. S. Li, A. Meisner, R. Miquel, J. Moustakas, J. Nie, N. Palanque-Delabrouille, W. J. Percival, C.Read More →

[Ne v] emission from a faint epoch of reionization-era galaxy: evidence for a narrow-line intermediate mass black hole J. Chisholm, D. A. Berg, R. Endsley, S. Gazagnes, C. T. Richardson, E. Lambrides, J. Greene, S. Finkelstein, S. Flury, N. G. Guseva, A. Henry, T. A. Hutchison, Y. I. Izotov, R. Marques-Chaves, P. Oesch, C. Papovich, A. Saldana-Lopez, D. Schaerer, M. G. Stephenson arXiv:2402.18643v1 Announce Type: new Abstract: Here we present high spectral resolution $textit{JWST}$ NIRSpec observations of GN42437, a low-mass (log(M$_ast/M_odot)=7.9$), compact ($r_e arXiv:2402.18643v1 Announce Type: new Abstract: Here we present high spectral resolution $textit{JWST}$ NIRSpec observations of GN42437, a low-mass (log(M$_ast/M_odot)=7.9$), compact ($r_eRead More →

The frequency of metal-enrichment of cool helium-atmosphere white dwarfs using the DESI Early Data Release Christopher J. Manser, Boris T. G"ansicke, Paula Izquierdo, Andrew Swan, Joan Najita, C. Rockosi, Andreia Carrillo, Bokyoung Kim, Siyi Xu, Arjun Dey, J. Aguilar, S. Ahlen, R. Blum, D. Brooks, T. Claybaugh, K. Dawson, A. de la Macorra, P. Doel, E. Gazta~naga, S. Gontcho A Gontcho, K. Honscheid, R. Kehoe, A. Kremin, M. Landriau, L. Le Guillou, Michael E. Levi, T. S. Li, A. Meisner, R. Miquel, J. Nie, M. Rezaie, G. Rossi, E. Sanchez, M. Schubnell, G. Tarl’e, B. A. Weaver, Z. Zhou, H. Zou arXiv:2402.18644v1 Announce Type: newRead More →

Design of the 50-meter Atacama Large Aperture Submm Telescope Tony Mroczkowski, Patricio A. Gallardo, Martin Timpe, Aleksej Kiselev, Manuel Groh, Hans Kaercher, Matthias Reichert, Claudia Cicone, Roberto Puddu, Pierre Dubois-dit-Bonclaude, Daniel Bok, Erik Dahl, Mike Macintosh, Simon Dicker, Isabelle Viole, Sabrina Sartori, Guillermo Andr’es Valenzuela Venegas, Marianne Zeyringer, Michael Niemack, Sergio Poppi, Rodrigo Olguin, Evanthia Hatziminaoglou, Carlos De Breuck, Pamela Klaassen, Francisco Montenegro-Montes, Thomas Zimmerer arXiv:2402.18645v1 Announce Type: new Abstract: Submillimeter and millimeter wavelengths can reveal a vast range of objects and phenomena that are either too cold, too distant, or too hot and energetic to be measured at visible wavelengths. For decades the astronomicalRead More →

CHEX-MATE: Robust reconstruction of temperature profiles in galaxy clusters with XMM-Newton M. Rossetti, D. Eckert, F. Gastaldello, E. Rasia, G. W. Pratt, S. Ettori, S. Molendi, M. Arnaud, M. Balboni, I. Bartalucci, R. M. Batalha, S. Borgani, H. Bourdin, S. De Grandi, F. De Luca, M. De Petris, W. Forman, M. Gaspari, S. Ghizzardi, A. Iqbal, S. Kay, L. Lovisari, B. J. Maughan, P. Mazzotta, E. Pointecouteau, G. Riva, J. Sayers, M. Sereno arXiv:2402.18653v1 Announce Type: new Abstract: The “Cluster HEritage project with xmm: Mass Assembly and Thermodynamics at the Endpoint of structure formation” (CHEX-MATE) is a multi-year Heritage program, to obtain homogeneous XMM-Newton observationsRead More →