Lorentz Workshop: Tuning to the high frequency ALMA Universe

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In the week of September 4-8, an ALMA-dedicated workshop will take place at the Lorentz Center in Leiden.  The workshop aims at gathering the ALMA community to discuss and further develop the unique science that can be achieved at the highest frequencies offered (Bands 8, 9, and 10).  ALMA is the only ground-based interferometer that can routinely observe at frequencies > 350 GHz, making it a truly unique instrument. At the workshop, we aim to discuss the status of high frequency observations for galactic and extragalactic science and to explore which questions have arisen in the field that can be answered with high frequency observations. We will also discuss future developments, technologies, and the ALMA upgrade. The overall goal is to create new ideas, collaborations and synergies within our community and the observatory that will enhance the discovery space of ALMA.

The workshop will be attended by 50 participants from several relevant scientific areas from all ALMA regions, the executives and the Joint ALMA observatory. 

For more information visit: https://www.lorentzcenter.nl/tuning-to-the-high-frequency-alma-universe.html

IAU I-HOW Radio Astronomy Workshop

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A joint Iran and Türkıye radio astronomy workshop is set to take place at Erciyes University in Kayseri in Türkıye in the next two weeks (Sep. 4-15). The workshop is part of the IAU Hands-On Workshops (I-HOW) initiative that aims to train young scientists in developing countries in accessing, analyzing and using the vast amounts of astronomical data currently available in archives for their research projects. The workshop will focus on teaching students and young researchers how to analyze radio data from arrays such as VLA, ALMA, MeerKAT, and LOFAR. The two-week workshop will provide ample time for lectures, tutorials, scientific talks of a wide range of topics, and hands-on projects. The students are also given an opportunity to present their own scientific works and request assistance on their own projects from the team of lecturers. Experts from Allegro as well as the Italian and UK ALMA Regional Centre Nodes will be at the workshop training students on how to access, calibrate, image, and analyze ALMA observations. For more information, see the website of I-HOW Radio Astronomy Workshop.

Science Highlight: All quiet at z=4.5

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Standard galaxy formation models expect that young galaxies should be highly turbulent and kinematically chaotic, as a result of violent gas accretion and frequent mergers. Observations appear to tell a very different story. In this paper, Roman-Oliveira (Kapteyn Institute), Fraternali and Rizzo (2023, MNRAS 521, 1045) show archival ALMA data of the [C II] 158 micron line of five galaxies at z ~ 4.5 at 0.1-0.2 arcsec resolution (~1 kpc). All these galaxies show clear velocity gradients in the [C II] line. Four of these can be explained as rotationally supported disk, and only one is a likely unresolved merger. Turbulent velocities are low, showing that quiescent disks are common even at z ~ 4.5. This paper also shows that the high resolutions offered by ALMA are essential to separate the quiescent disks from localized kinematic features such as inflow/outflow. It also illustrates the potential for discovery through publicly accessible ALMA archival data, even for previously published data that were never interpreted together.

 

Figure: Observed and modeled velocity patterns of ALMA archival [C II] line emission of the five galaxies at z~4.5 studied by Roman-Oliveira et al. (2023).

First fringes for the ALMA Band-2 pre-production receivers

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Over the next few years, ALMA will open up the 2.6-4.5 mm wavelength range for scientific observations with its slew of newly developed Band 2 receivers. The first three Band-2 ‘pre-production’ receivers were recently installed at ALMA, developed and built by the NOVA submillimeter group at the University of Groningen together with GARD/Chalmers University, Sweden, INAF Italy, NAOJ Japan, the University of Chile, and ESO. ‘First fringes’ were obtained with this set of receivers, marking the moment when ALMA opens its eyes at these wavelengths. [more information]

ALMA Proposal Preparation Day 2023

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The Allegro ALMA Regional Centre node is organising a proposal preparation workshop on Thursday the 20th of April 2023 in advance of the upcoming ALMA proposal deadline (expected to be the 10th of May 2023). We would like to invite you to attend online or in person at Leiden Observatory.

The workshop will have two sessions:

  1. Morning (10:00 – 12:00): Introduction to writing and preparing ALMA proposals.
  2. Afternoon (13:00 – 14:00): Summary of new features and changes in Cycle 10.

The morning session will introduce attendees to writing and preparing ALMA proposals. The topics covered will include the dual anonymous review process, distributed peer review, accessing the ALMA archive and using the ALMA Observing Tool (OT) to prepare your observing programme. No prior ALMA experience is necessary for attendance.

The afternoon session will cover the differences between Cycle 10 and Cycle 9. In particular, we will highlight the new capabilities of ALMA in this cycle, including the new ALMA Band 1 and the new availability of joint proposals with JWST, the VLA and the VLT. The afternoon session is designed for returning ALMA users and is also suitable for attendees of the morning session.

Both sessions will have time for your questions, and tea, coffee and biscuits will be provided for in person attendees. You can register to attend online or in person for one or both of the sessions before Thursday, April 13, 2023 using our registration form. For more information about the expected dates and what will be on offer in Cycle 10, please see the ALMA Cycle 10 Pre-announcement. 

In addition to this proposal preparation day, you can request a meeting with the Allegro staff (e-mail us) to discuss your proposal or come to our drop-in sessions (April 24, May 1, and May 8 at HL-1122 from 14:00-16:00).

Program April 20, 2023 (Tentative)
10:00-12:00 Introduction to Proposal Preparation (slides) (GOB/EM1.09) Allegro Team
12:00-13:00 Lunch
13:00-14:00 ALMA’s New Capabilities in Cycle 10 (slides) (GOB/EM1.09) Allegro Team
 
Directions to Leiden Observatory

The address of Leiden Observatory is Niels Bohrweg 2, 2333 CA Leiden. Note that this is not the old observatory in the center of Leiden. Instructions on how to get to Leiden Observatory, including transportation from Schiphol Airport or the central trains station, can be found here. Leiden Observatory is located on the 4-5th floors of the Oort building (seen on the right in the photo below), and the Huygens building (the taller building seen on the left in the photo below). Allegro offices are located on the 11th floor of the Huygens building.

The workshop will take place in room EM 1.09 in the New Gorlaeus building. We will have signs and there is also a reception at the entrance of the building where they can provide you with directions.

For those joining us online, connection details will be sent to you by email before the start of the event.

lorentzcenter

 

Useful resources:

Hands up for a community assembly!

Sixth European ALMA Regional Centre community assembly

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The Sixth European ALMA Regional Centre community assembly meeting will take place virtually on the 17th of April at 11:00 CEST and can be accessed via this Microsoft Teams link. During the meeting, staff from the European ALMA Regional Centre will present updates on ALMA Cycle 10, in particular the procedures for Joint Proposals with other facilities including the European Southern Observatory’s Very Large Telescope, the Space Telescope Science Institute’s James Webb Space Telescope, and the National Radio Astronomy Observatory’s Karl G. Jansky Very Large Array. In addition, you will hear about the new capabilities offered in Cycle 10, including ALMA Band 1, and the support that the European ARC network offers the community. 

Crowdfunding campaign to establish a planetarium in San Pedro de Atacama

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Former ALMA director, Thijs de Graauw, and the Fondacion “Planetarios Educativos para Chile” have launched a crowdfunding campaign to construct and operate a public planetarium in San Pedro de Atacama, ALMA’s host community. This provides the opportunity to include the people of San Pedro de Atacama in the celebrations of 10 years of ALMA science operations, and express appreciation for the Licanantai communities upon whose sacred lands the ALMA Observatory is situated. The planetarium will open the ALMA universe for this local community, and will provide a window to the world of science and technology for schools and colleges that will help inspire young people to learn and participate in the STEM fields.

For more information and to donate, visit https://gofund.me/7efdfcf4

ALMA Cycle 10 proposal preparation workshop

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The Allegro ALMA Regional Centre node is organising a proposal preparation workshop on the 20th of April 2023 in advance of the upcoming ALMA proposal deadline (expected to be the 10th of May 2023). The workshop will have two sessions: In the morning there will be an introduction to writing and preparing ALMA proposals for new users. In the afternoon there will be a summary of new features and changes in Cycle 10 for experienced users as well as the attendees of the morning session. You are welcome to attend online or in person at Leiden Observatory. For more information about the workshop, visit the workshop website. Registration deadline is April 13, 2023.

In addition to this proposal preparation day, you can request a meeting with the Allegro staff to discuss your proposal or come to our drop-in sessions (April 24, May 1, and May 8 at HL-1122 from 14:00-16:00). We especially encourage anybody who is considering submitting a Large Programme to contact us at Allegro early so that we can explore the many ways we can support your project and help optimise your program.

If you want to get a head start on thinking about writing an ALMA proposal, Allegro’s Program Manager Violette Impellizzeri gave a presentation last year, available to view as a YouTube video, about writing and reviewing ALMA proposals. It includes guidelines for writing dual anonymous proposals and useful tips and tricks.

More about Cycle 10:

It is expected that antenna configurations C-1 to C-8 will be available in Cycle 10. There will also be several new capabilities offered by ALMA in this cycle, including the new ALMA Band 1 and the new availability of joint proposals with JWST, the VLA and the VLT. For more information about the expected dates and what will be on offer in Cycle 10, please see the ALMA Cycle 10 Pre-announcement.

Science highlight: Tracing galaxy mass loss via OH absorption at high redshift

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Mass loss from high-redshift galaxies is crucial in quenching star formation and enriching the intergalactic medium. Only limited information is available on the gas mass loss of galaxies at z>6. Using ALMA observations of OH 119 μm doublet toward a small sample of high-redshift unobscured QSO host galaxies, Butler et al. (2023, ApJ 944, 134) trace the outflows blueshifted absorption. Estimating the mass loss rate, the authors conclude that the mass loss is likely driven by star formation alone, with only a small contribution from the AGN. Viewing geometry and coverage factor are important factors in the interpretation of the absorption lines and inference of the mass loss rates. Higher resolution follow-up observations with ALMA, and data on a larger sample, will further strengthen the presented results. This work included contributions from astronomers from Leiden, Delft, Heidelberg and Bologna.

Above Figure: ALMA continuum (left) and OH absorption (right) observations of one of the unobscured QSO host galaxies studied by Butler et al. (2023). Blueshifted OH 119 μm absorption traces star-formation driven mass-loss from this z=6 galaxy.