Atacama Cosmology Telescope
@ACT_Pol
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...a six-meter telescope located at 5190 meters on Cerro Toco in northern Chile, dedicated to observing the structure and evolution of the universe...
Cerro Toco, Atacama Desert
Joined June 2012
Another paper release!.
The distortions in the images of galaxies and the CMB by gravitational lensing due to matter in the universe are related. Our new paper measures this correlation with observations from @theDESurvey and @ACT_Pol.
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Video summary of our paper release led by the awesome @farren_gerrit.
Watch us discuss our analysis in this video (. 6/6.
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RT @farren_gerrit: !!!New Paper out on arxiv today!!!. We measure structure formation from the cross-correlation of CMB lensing and galaxy….
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RT @BLSchmitt: 📡Proud to be part of @Penn who will extend the @SimonsObs scope to investigate the early Universe with the #AdvancedSimonsOb….
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Interesting new opportunity for those interested in #astronomy! #SoftwareEngineer #SoftwareDeveloper.
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RT @ermcalabrese: We (@ACT_Pol) have a groundbreaking new image revealing the most detailed map of dark matter distributed across a quarter….
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The seminar is starting now - join us!.
Join us for a 1 hour webinar Tuesday, April 11 at 10am Eastern on zoom (pre-registration required): including Q&A about cosmology from a new measurement of gravitational lensing of the CMB, using ACT 2017-21 data. #cmb #cosmology @NSF.
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The results are based on three papers that will be posted to the ACT website ( on April 11, and will then appear on the arXiv. The speakers will include lead authors from those papers. Make sure to register #cmb #cosmology.
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Join us for a 1 hour webinar Tuesday, April 11 at 10am Eastern on zoom (pre-registration required): including Q&A about cosmology from a new measurement of gravitational lensing of the CMB, using ACT 2017-21 data. #cmb #cosmology @NSF.
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RT @EveVavagiakis: I'll be presenting on our SZ results with @ACT_Pol today at #AAS238, in Session 211 starting at 12pm ET. .
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The Tornado is thought to be a supernova remnant, but the long tail is difficult to explain. We see the tail in total emission (left) but not polarized emission (right), and note that the magnetic field lines do change in the transition from head to tail. (7/n)
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The Brick (insert brick emoji if there is one) is a massive, dense molecular cloud that has surprisingly little star formation. We find a well-ordered magnetic field in the Brick roughly aligned with its bean-like shape. (6/n) @ACT_Pol #molecularcloud
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ACT also maps polarized radiation that allows us to infer the structure of magnetic fields. Most of the field lines run parallel to the Galactic plane, except in the very center where a strong vertical radio filament dominates the emission. (4/n)
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The three ACT frequencies are sensitive to different emission mechanisms at work in the Galactic center. Red highlights emission from relativistic electrons while emission from dust grains appears blue. Look at how many familiar objects we are able to see! (3/n)
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@yilun_guan @suzIQUV @brandonshensley ACT data fills in the details of the lower-resolution Planck maps, revealing a wealth of structure! (2/n)
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