As the pandemic continued throughout 2021, the Allegro staff also continued working from home for most of the year. However, despite of this, the group remained operational with activities divided into three main categories:

• user support (e.g., contact scientist activities, face-to-face requests and training events)
• development of expertise areas
• carrying out independent scientific research.

It is particularly worth noting that Allegro had a full staff turnover in the past two years! With the exception of Michiel Hogerheijde (the Program Director) a whole new team was formed between 2020 and 2021, with the last three group members joining just over one year ago. This means that a good part of this year was dedicated to defining our internal workflows, updating our documentation and why not, getting to know each other (over Zoom!).

We would like to highlight here some of the most outstanding activities of Allegro from 2021, starting with our community events: we carried out a proposal preparation day in March and two Science Days and CASA training days in January and November. We featured presentations from the broad ALMA science community in the Netherlands, and also carried out dedicated trainings with hands-on components (for the most recent one, please read more here). Note that you can find recording of all these events on our Allegro YouTube channel and please remember to subscribe!

As mentioned previously, our Allegro postdocs also spend a significant fraction of their time on expertise areas. For 2021, most notably, we would like to mention two of those projects which were finalized this year: an easy-to-use and flexible-to-be-customized ALMA archival search tool, called ALminer¹ and a new ALMA tracker² (aka, the Dashboard) which is already being used by most of the EU ARC nodes to keep a regular overview of ALMA projects in the current queue, with data directly imported from the telescope.

As a look forward in 2022, we would like to advertise two very exciting new activities led by Allegro. The first is an outreach program in collaboration with the Leiden City of Science program and the Old Observatory: we will create a virtual ALMA telescope within the city of Leiden and demonstrate how large ALMA really is but also how interferometry works. Our program will also feature special Leiden walks, and games!

The second new activity will involve students at other Universities, who will be our new emissaries and will be kept “in the know” about ALMA-related activities throughout the year. More information will be distributed in the next newsletter, so please stay tuned to find out more!

We also continued to help our users with their approved projects and with their ALMA data as needed. You can contact us at any time at alma@strw.leidenuniv.nl.

¹ALminer was developed by Aida Ahmadi in collaboration with Alvaro Hacar.

²The ALMA tracker was developed by Andres Pérez Sánchez in collaboration with Carmen Toribio Perez.

The 5th Netherlands ALMA Science day was hosted by the Allegro team on the 29th November, 2021. For the second time in a row this was a fully on-line version.

The scientific program included invited and contributed talks highlighting results of projects with all or part of the data taken by the ALMA telescope. The invited speakers for this special day were Dr. Alice Booth (Leiden Observatory – The Netherlands), Dr. Eva Schinnerer (MPIA – Germany), and Dr. Gergö Popping (ESO – Germany).

They presented results from ALMA observations of molecular gas: Dr. Booth presented results from deep observations of molecular gas at planet-forming scales taken with ALMA, showing both spatial distribution and the kinematics of the molecular gas detected. Later on, Dr. Schinnerer presented results from high resolution observations of nearby massive star-forming galaxies, and the analysis of a multi-wavelength data set including ALMA observations.

Then, Dr. Popping presented the current status of the ALMA telescope, including a summary of the return-to-science-operation-process, the end of Cycle 7 and the beginning of Cycle 8, as well as results of the analysis from the Proposal handling team of the proposal review process for ALMA observing Cycle 8.

Moreover, the program included 10 contributed talks by researchers from MPIfR, Leiden Observatory, ASTRON & Kapteyn Astronomical Institute. The contributed talks spanned over topics, frequencies (wavelengths), and spatial scales: Results from measurements towards the gaps of planet-forming disks to observations of molecular gas interacting in the circumnuclear disk of Active Galactic Nuclei using ALMA and also MATISSE were presented. The program also had contributed talks showing results of observations of high-z, massive, and active ultra luminous infrared galaxies or zooming in on the environment around the most famous black hole thanks to the Event Horizon Telescope project.

In total, approximately 35 participants (researchers and graduate students) from different institutions, including University of Groningen, KU Leuven, Nicolas Copernicus University, University of Amsterdam, SRON, ASTRON, Kapteyn Astronomical Institute, Leiden Observatory, and the Max Plank Institute for Astronomy (MPIA), and National Institute of Science Education and Research (India), attended the science talks, discussion and virtual social program organized by the Allegro Team.

P.d. The records of the Science day will be edited and made available for public access on the Allegro social media channels.

Using Cycle 6 ALMA observations of the far-infrared bright radio galaxy PKS0023-26, Morganti et al. study the impact of the jet that is driven by the black hole powering the Active Galactic Nucleus on the interstellar gas. The 0.13-0.4” resolution images of 1.7 mm continuum and 12CO(2-1) emission reveal that the jet only strongly perturbs the inner sub-kpc regions. On scales of a few kpc, the action is limited to a more gentle “pushing aside” of the gas. Currently, this galaxy is forming stars at a clip pace of 25 M_sun/year; in another few x 10⁷ year, this rate may drop as the jet and lobes have expanded across the galaxy. This works shows that the feedback of the AGN on galaxy ISM and star formation acts on long time scales. The results will be published in Astronomy & Astrophysics and are already available on arXiv.