Thread by @El_Lobo_Rayado

Busy day today: @ARC_ASTRO3D Science Meeting at @CSIRO_ATNF, @MQPhysAstro fortnight meeting, lecturing at @MQSciEng & @pintofscienceAU tonight... and where am I right now? Walking Pyrmont Bridge in Sydney’s Darling Harbour... #youdontneedtoknowthedetails #A3Dscimeet19 #Pint19AU

Meeting done, now lecturing /tutoring basics of optics & lens for @MQSciEng PHYS149 Physics for Life Sciences. I’ll be attending #A3Dscimeet19 all the afternoon so expect my MANY tweets about amazing @ARC_ASTRO3D science. And tonight... @pintofscienceAU #Pint19AU What a Day!

Important: even when you’re having a busy day full of things, you’re a human being and YOU NEED TO EAT AND DRINK WATER after a long meeting and 2 hours class... almost done having lunch, on my way (late) to @ARC_ASTRO3D #A3Dscimeet19

My first talk at #A3Dscimeet19 is Kate Harborne @ICRAR talking about SimSpin: a code for constructing mock IFU datacubes, already available on GitHub @ARC_ASTRO3D

Chris Power @ICRAR provides a quick status update about the Genesis Simulations programme. Something important to consider is the feedback. Also develop sophisticated models that can be directly compared to observables #A3Dscimeet19 @ARC_ASTRO3D

During today’s #A3Dscimeet19 afternoon coffee break I could get this nice photo of important @galahsurvey people checking their talks :-)

Amazing @_sarahmartell_ chairs this #A3Dscimeet19 session featuring @galahsurvey

First talk is Gayandhi De Silva @AAOMacquarie @MQSciEng providing an overview of the @galahsurvey survey: it uses 2dF + HERMES spectrograph at the AAT @scienceANU , 4 independent channels, example spectra included #A3Dscimeet19

Gayandhi De Silva @AAOMacquarie @MQSciEng: @galahsurvey using HERMES provide data that allow us to measure the chemical abundance of 29 elements, including alpha-e, iron peak e, s-process and r-process. Plenty of observations, needing robust pipelines #A3Dscimeet19

Well, actually 30 elements! The Data Release 2 published in 2018 contains +342 thousand stars! Thus is ~1/3 of all the stars @galahsurvey wants to observe, A MILLION! These data are providing “the Milky Way Stellar DNA” #A3Dscimeet19

Gayandhi De Silva @AAOMacquarie @MQSciEng summarises in 2 slides the main results obtained by the @galahsurvey so far #A3Dscimeet19

Some final comments about @galahsurvey: context of the survey when compared with similar past/ongoing/future stellar surveys and now with @ESAGaia data GALAH will focus on MSTO (main sequence turn off) and sub-giants stars #A3Dscimeet19

Next Shourya Khanna @Sydney_Science talks about linking ridges, arches and vertical waves in the kinematics of the Milky Way using @ESAGaia data. Check comparison of Hipparcos survey vs. Gaia for astrometry #A3Dscimeet19

Of course, combining 6D (position+velocity in 3D) and the chemical abundances provided by the @galahsurvey survey, Shourya Khanna @Sydney_Science can investigate better all these features #A3Dscimeet19

Final slide by Shourya Khanna @Sydney_Science in #A3Dscimeet19 : a particular substructure in the Milky Way known as R-Vphi could be EXTERNAL but also INTERNAL following this analysis, as consequence of transient spiral arms

Now Michael Hayden @Sydney_Science talks about chemodynamics of the Solar Neighbourhood with @galahsurvey. Main problem: stars move!! We can use chemical abundances to help us to understand this, e.g, from where metal-rich stars close to the Sun are coming? #A3Dscimeet19

Michael Hayden @Sydney_Science uses @galahsurvey + @ESAGaia to study radial mixing in the Solar Neighbourhood: >80% metal rich stars can be explained by migration #A3Dscimeet19

Michael Hayden @Sydney_Science emphasises that alpha-element are also good for tracing ages of stars, using that previous studies suggested past mergers but much better quality @galahsurvey + @ESAGaia data do not support that #A3Dscimeet19

Next @JossBlandHawtho @Sydney_Science presents @galahsurvey : giant waves in the Galaxy #A3Dscimeet19

Joss @JossBlandHawtho @Sydney_Science summarises his latest @galahsurvey + @ESAGaia paper dissecting the stellar disc’s phase space by location, chemistry, age and action #A3Dscimeet19

Joss @JossBlandHawtho summary slide in #A3Dscimeet19 : observed phase spiral mostly confined in the “alpha-0” disk (also attached slide where he explains definitions of alpha-cero)

Last talk in todays’s #A3Dscimeet19 is Martin Asplund @scienceANU talking about the hunting of the first stars of the Universe, i.e. the oldest stars, measured by metallicity [Fe/H]. They use @SkyMapper data & metallicity dependence of colors to get candidates

But candidates need follow-up observations first at 2.3m ANU @scienceANU telescope and later @ESO VLT & @GMTelescope. Martin Asplund @scienceANU et al have found a star with the lowest [Fe/H] ever measured, but still it is a second-generation star #A3Dscimeet19

The day continues. Now #Pint19AU is ON in Sydney. For our first night at the Botanic View Hotel we first have Gideon Meyerowitz-Katz (Epidemiologist at University of Wollongong / @westernsydneyu ) talking about “Our diabetes problem”

After the break & funny quiz, Professor Seán O'Donoghue (Laboratory Head, Garvan Institute of Medical Research, @CSIROnews ) talks about “Surveying the proteins” in Sydney’s #Pint19AU at the BoTania View Hotel

I just arrived home after a very long day today... but it feels so great to be full action again! Great 1st #Pint19AU event besides missing @AstroKirsten Ah! Y escuché a @javierarmentia hablando de #Pint19ES en @La_SER, gracias @HoyPorHoy @PepaBueno por incluir @pintofscienceES

And the magic for Monday thread... @threadreaderapp unroll please!