OGHReS: star formation in the outer galaxy (ℓ=250°-280°)

Simple item page
dc.contributor.authorUrquhart, J. S.
dc.contributor.authorKoenig, C.
dc.contributor.authorColombo, D.
dc.contributor.authorKarska, A.
dc.contributor.authorWyrowski, F.
dc.contributor.authorMenten, K. M.
dc.contributor.authorMoore, T. J. T.
dc.contributor.authorBrand, J.
dc.contributor.authorElia, D.
dc.contributor.authorGiannetti, A.
dc.contributor.authorLeurini, S.
dc.contributor.authorFigueira, M.
dc.contributor.authorLee, M. -y
dc.contributor.authorDumke, M.
dc.date.accessioned2025-01-20T17:08:40Z
dc.date.available2025-01-20T17:08:40Z
dc.date.issued2024
dc.description.abstractWe have used data from the Outer Galaxy High-Resolution Survey (OGHReS) to refine the velocities, distances, and physical properties of a large sample of 3584 clumps detected in far-infrared/submillimetre emission in the Hi-GAL survey located in the & ell; = 250 degrees-280 degrees region of the Galactic plane. Using (CO)-C-12 and (CO)-C-13 spectra, we have determined reliable velocities to 3412 clumps (95 per cent of the sample). In comparison to the velocities from the Hi-GAL catalogue, we find good agreement for 80 per cent of the sample (within 5 km s(-1)). Using the higher resolution and sensitivity of OGHReS has allowed us to correct the velocity for 632 clumps and provide velocities for 687 clumps for which no velocity had been previously allocated. The velocities are used with a rotation curve to refine the distances to the clumps and to calculate the clumps' properties using a distance-dependent gas-to-dust ratio. We have determined reliable physical parameters for 3200 outer Galaxy dense clumps (similar to 90 per cent of the Hi-GAL sources in the region). We find a trend of decreasing luminosity-to-mass ratio with increasing Galactocentric distance, suggesting the star formation efficiency is lower in the outer Galaxy or that it is resulting in more lower mass stars than in the inner Galaxy. We also find a similar surface density for protostellar clumps located in the inner and outer Galaxy, revealing that the surface density requirements for star formation are the same across the Galactic disc.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stad3983
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stad3983
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90972
dc.identifier.wosidWOS:001164522700012
dc.issue.numero3
dc.language.isoen
dc.pagina.final4759
dc.pagina.inicio4746
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectstars: formation
dc.subjectstars: protostars
dc.subjectISM: molecules
dc.subjectGalaxy: structure
dc.subjectinfrared: stars
dc.titleOGHReS: star formation in the outer galaxy (ℓ=250°-280°)
dc.typeartículo
dc.volumen528
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
OGHReS.pdf
Size:
22.51 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas