NAM 2018 NEWS FROM NAM Making the news from NAM 2018 The combined EWASS and NAM meetings were larger than usual, with more stories released to the press – here are some of the highlights. New age estimates for Solar Dynamics Observatory appear to show tall, twisting structures stars in Milky Way bar in the Sun’s plasma, described as STAR FORMATION The first tornadoes based on the similarity of large-scale age map of stars in their appearance to tornado funnels the Milky Way has shown that on Earth. But Lebrosse and the team stars in the galactic bulge formed have added velocities derived using 11–7 billion years ago. Marina the Doppler ee ff ct and shown that Rejkuba (European Southern the 3D pattern is die ff rent. “Despite Observatory) and team used how prominences and tornadoes data from the VISTA Variables appear in images, the magnetic field in the Via Lactea (VVV) infrared is not vertical, and the plasma mostly survey. They compared simula- moves horizontally along magnetic tions with VVV data and spectra e fi ld lines,” said Labrosse. “However, of 6000 stars from the GIRAFFE/ we see tornado-like shapes in the FLAMES instrument on ESO’s images because of projection ee ff cts, Don’t believe what you see on the Sun Very Large Telescope. “Our where the line-of-sight information findings were not consistent with SDO 2D images of structures on an inter national team from Glasgow, is compressed onto the plane of the a purely old Milky Way bulge,” the Sun such as prominences and Paris Observatory, the University of sky.” The picture shows an erupt- said Rejkuba, “but require star solar tornadoes give a mislead- Toulouse and the Czech Academy ing solar prominence observed by formation lasting around 4 billion ing impression of the movement of Sciences. Data from the multi- SDO on 31 August 2012. (NASA/SDO/ years and starting around 11 bil- involved, according to Nicolas wavelength Atmospheric Imaging GSFC) lion years ago. The youngest stars Labrosse (University of Glasgow) and Assembly (AIA) instrument on NASA’s http://bit.ly/2HGWvgI are at least 7 billion years old, which is older than some previ- ous studies had suggested.” Their lensing is in accord with the Pursiainen (University of South- data do not allow discrimination standard cold dark matter model ampton) noted that the transients between stars in the bar and the of the universe. In 2015, the same are as bright as some supernovae, bulge, but indicate that the bar group found signs that one of the but fade faster, lasting weeks had formed by 7 billion years ago. four galaxies at the heart of the rather than months. They are http://bit.ly/2KqOQAR cluster had an odd distribution hot, 10 000–30 000 K, and big, of mass, offset from the visible from a few to ~100 au. Their light part of the galaxy. This could curves suggest that they cool and Milky Way is growing, be ascribed to self-interactions expand as they age, consistent little by little between dark matter that held it 1 Large rhinos might be relatively easy with an explosive origin. The sig- GALAXY EXPANSION Our galaxy back from normal matter as the to identify in infrared, but the project nals could come from a cloud of is probably growing – but slowly, galaxies came together. Now the has had success with rare rabbits too. ejected matter, not the star itself. getting bigger by about 500 m same team has added Atacama (Endangered Wildlife Trust/LJMU) http://bit.ly/2FwRIse every second. The growth comes Large Millimetre/submillimetre from starbirth in the outer parts Array data to their armoury, held a e fi ld trial in South Africa Car emission chemistry of the disc, according to Cristina together with more spectroscopy last September to detect riverine for exoplanets Martínez-Lombilla (Instituto de from the VLT MUSE instru- rabbits, one of the most endan- Astrofísica de Canarias in Tener- ment. The infrared signal proved gered mammals in the world,” EXOCHEMISTRY Olivia Venot ife) and collaborators. They com- crucial to the improved model, said Claire Burke (LJMU). “They (Laboratoire Interuniversitaire bined optical data from the Sloan which shows the mass distribu- are very small, but we managed des Systèmes Atmosphérique in Digital Sky Survey, ultraviolet tion aligned with the stars for v fi e sightings. Given that there Paris) and Eric Hébrard (Uni- data from GALEX and infrared all four galaxies. The results are have only been about 1000 sight- versity of Exeter) have turned to data from the Spitzer Space Tele- published by Massey et al. in ings ever, it was a real success.” chemical models designed for car scope to identify young stars in Monthly Notices of the RAS. The team has now modelled the engines to track chemical path- spiral galaxies like our own. They http://doi.org/10.1093/mnras/sty630 effects of vegetation, so that they ways in hot Jupiters and warm measured the stars’ velocities can detect animals hidden by Neptunes. “Chemical networks and calculated how quickly they trees or plants. Further e fi ld tests developed for car engines are Astro tools help were moving apart and thus how will look for orangutans, spider very robust as a result of years of protect rare animals quickly the galaxies would grow. monkeys and river dolphins. intense R&D, lab studies and vali- http://bit.ly/2JEGiFk ECOLOGY A project using astro- http://bit.ly/2joh8zP dation,” said Venot. “Car models nomical tools and thermal imag- are valid for temperatures up to ing is helping to detect rare and over 2000 °C and a wide range of No interacting dark Bright transients endangered animals. A team of pressures, so are relevant to the matter in Abell 3827 surprisingly transient astronomers and ecologists from study of a large diversity of warm GRAVITATIONAL LENSING Dark Liverpool John Moores University DARK ENERGY SURVEY A survey and hot exoplanet atmospheres.” matter is not interacting with has combined machine-learning has found 72 very bright, very http://bit.ly/2rcFzEm itself in the Abell 3827 cluster, algorithms and tools for astro- fast and really quite odd transient after all. New data on this unu- nomical detection with thermal stars. They look like super novae, sual galaxy cluster reported by infrared cameras on drones (g fi - but don’t match any model. ▶ Turn over for more News from Richard Massey (University of ure 1). The goal is an automated The data come from the Dark NAM, and see page 3.16 for a Durham) and colleagues suggest system that can find and track Energy Survey, which includes report from the conference floor. that the pattern of gravitational animals – and poachers. “We a supernova search. Miika A&G • June 2018 • Vol. 59 • aandg.org 3.9 Downloaded from https://academic.oup.com/astrogeo/article-abstract/59/3/3.9/4995417 by Ed 'DeepDyve' Gillespie user on 20 June 2018
Astronomy & Geophysics – Oxford University Press
Published: Jun 1, 2018
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