Vialactea Visual Analytics Tool for Star Formation Studies of the Galactic Plane

Vitello, F.; Sciacca, Eva; Costa, Alessandro; Bandieramonte, Marilena; Benedettini, M.; Brescia, M.; Butora, Robert; Cavuoti, S.; Giorgio, A. M. Di; Elia, D.; Liu, S. J.; Molinari, S.; Molinaro, M.; Riccio, G.; Schisano, E.; Smareglia, R.

doi:10.1088/1538-3873/aac5d2

Cited by 3 publications

(3 citation statements)

References 32 publications

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“…Calibrated spectra for each 30 × 30 tile are packed into eight files in the GILDAS format, distinguishing between observed line ( 12 CO (1-0) or 13 CO (1-0)), scan direction (along l or b), and filter banks (FB250 and FB100). The FQS spectral cubes are made available to the community also in the framework of the VIALACTEA 3 knowledge base (Molinaro et al 2016), accessible through the VIALACTEA visual analytics tool (Vitello et al 2018), which allows the inspection of our data in combination with other continuum and spectroscopic data of the Galactic plane from many surveys from infrared to radio frequencies.…”

Section: Data Reduction Pipelinementioning

confidence: 99%

The Forgotten Quadrant Survey

Benedettini

Molinari

Baldeschi

et al. 2020

A&A

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Aims. We present the Forgotten Quadrant Survey (FQS), an ESO large project that used the 12 m antenna of the Arizona Radio Observatory to map the Galactic plane in the range 220° < l < 240° and −2.°5 < b < 0°, both in 12CO (1–0) and 13CO (1–0), at a spectral resolution of 0.65 km s−1 and 0.26 km s−1. Methods. We used the (1–0) transition of carbon monoxide to trace the molecular component of the interstellar medium. Our data set allows us to easily identify how the molecular dense gas is organised at different spatial scales: from the giant clouds with their denser filamentary networks, down to the clumps and cores that host the new-born stars and to obtain reliable estimates of their key physical parameters such as size and mass. Results. We present the first release of the data of the FQS survey and discuss their quality. Spectra with 0.65 km s−1 velocity channels have noise ranging from 0.8 K to 1.3 K for 12CO (1–0) and from 0.3 K to 0.6 K for 13CO (1–0). In this first paper, we used the 12CO (1–0) spectral cubes to produce a catalogue of 263 molecular clouds. The clouds are grouped in three main structures corresponding to the Local, Perseus, and Outer arms up to a distance of ∼8.6 kpc from the Sun. This is the first self-consistent statistical catalogue of molecular clouds of the outer Galaxy obtained with a subarcminute spatial resolution and therefore able to detect not only the classical giant molecular clouds, but also the small clouds and to resolve the cloud structure at the sub-parsec scale up to a distance of a few kiloparsec. We found two classes of objects: structures with sizes above a few parsecs that are typical molecular clouds and may be self-gravitating, and subparsec structures that cannot be in gravitational equilibrium and are likely transient or confined by external pressure. We used the ratio between the Herschel H2 column density and the integrated intensity of the CO lines to calculate the CO conversion factor and we found mean values of (3.3 ± 1.4) × 1020 cm−2 (K km s−1)−1 and (1.2 ± 0.4) × 1021 cm−2 (K km s−1)−1, for 12CO (1–0) and 13CO (1–0), respectively. Conclusions. The FQS contributes to the general effort in producing a new generation of high-quality spectroscopic data for the Galactic plane in the less-studied third Galactic quadrant toward the outer Galaxy. The FQS has produced a data set of great legacy value, largely improving the data quality both in terms of sensitivity and spatial resolution over previous data sets.

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Section: Data Reduction Pipelinementioning

confidence: 99%

The Forgotten Quadrant Survey

Benedettini

Molinari

Baldeschi

et al. 2020

A&A

Self Cite

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“…VisIVO Visual Analytics [9] is an integrated suite of tools focused on handling massive and heterogeneous volumes of data coming from cutting-edge Milky Way surveys that span the entire Galactic Plane, homogeneously sampling its emission over the whole electromagnetic spectrum. The tool access data previously processed by data mining algorithms and advanced analysis techniques, providing highly interactive visual interfaces that offer scientists the opportunity for in-depth understanding of massive, noisy, and high-dimensional data.…”

Section: Visivo Visual Analyticsmentioning

confidence: 99%

Towards Porting Astrophysics Visual Analytics Services in the European Open Science Cloud

Sciacca

Vitello

Bordiu

et al. 2020

Advances in Intelligent Systems and Computing

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The European Open Science Cloud (EOSC) aims to create a federated environment for hosting and processing research data to support science in all disciplines without geographical boundaries, such that data, software, methods and publications can be shared as part of an Open Science community of practice. This work presents the ongoing activities related to the implementation of visual analytics services, integrated into EOSC, towards addressing the diverse astrophysics user communities needs. These services rely on visualisation to manage the data life cycle process under FAIR principles, integrating data processing for imaging and multidimensional map creation and mosaicing, and applying machine learning techniques for detection of structures in large scale multidimensional maps.

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“…These new IR Galactic plane surveys are characterized by a few arcsecs angular resolution, matching the ASKAP angular resolution, and have a very good sensitivity and sky coverage, to allow IR and radio counteparts to be efficiently identified and studied. Studies of this kind will be facilitated by visual analytics tools that have been recently developed to assist scientists in managing, visualizing and analysing large amount of data (Vitello al. 2018).…”

Section: Synergies With Existing Galactic Plane Surveysmentioning

confidence: 99%

A first glimpse at the Galactic plane with the ASKAP: the SCORPIO field

Umana

Trigilio

Ingallinera

et al. 2021

Monthly Notices of the Royal Astronomical Society

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In the broad context of the Australian Square Kilometer Array Pathfinder (ASKAP) early-science phase and preparation for the related surveys, we report the first radio observations toward the Galactic plane. The targeted field was chosen to encompass the entire SCORPIO survey, one of the several pathfinder projects for the Evolutionary Map of the Universe survey planned with the ASKAP. The observations were carried out in January 2018 at a central frequency of 912 MHz, with 15 operational antennas, and covered a total area of about 40 square degrees in three different pointings. The final image has a resolution of 24.1 × 21.1 arcsec2 and a median rms of $541\ \mu \mathrm{Jy\ beam}^{-1}$. We were able to extract 3545 candidate sources, 75 percent of them point sources. For a preliminary validation, a comparison with the 843 MHz Molonglo Galactic Plane Survey is presented. Although the present observations were obtained with the ASKAP only partially deployed, its unique capability to map complex sources, such as those inhabiting the Galactic Plane, at different angular scales, is highlighted. Within the SCORPIO field all the previously classified H ii regions, Planetary Nebulae (PNe) and Supernovae remnants (SNRs), previously known to be radio sources, were detected. We also report new radio detections from several H ii regions previously classified as ‘candidates’ or ‘radio quiet’ and from half of all the PNe in the SCORPIO field with robust classification. Most notably, we find numerous unclassified, extended sources which constitute a promising sample of candidates H ii regions and SNRs.

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Vialactea Visual Analytics Tool for Star Formation Studies of the Galactic Plane

Cited by 3 publications

References 32 publications

The Forgotten Quadrant Survey

The Forgotten Quadrant Survey

Towards Porting Astrophysics Visual Analytics Services in the European Open Science Cloud

A first glimpse at the Galactic plane with the ASKAP: the SCORPIO field

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