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dc.contributor.authorCamargo, Denilso da Silvapt_BR
dc.contributor.authorBica, Eduardo Luiz Damianipt_BR
dc.contributor.authorBonatto, Charles Josept_BR
dc.contributor.authorSalerno, Gustavo Maltapt_BR
dc.date.accessioned2015-04-17T01:58:08Zpt_BR
dc.date.issued2015pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/115407pt_BR
dc.description.abstractMolecular clouds at very high latitude (b > 60°) away from the Galactic plane are rare and in general are expected to be non-star-forming. However, we report the discovery of two embedded clusters (Camargo 438 and Camargo 439) within the high-latitude molecular cloud HRK 81.4−77.8 using WISE. Camargo 439 with Galactic coordinates = 81°.11 and b = −77°.84 is an ∼2 Myr embedded cluster (EC) located at a distance from the Sun of d๏ = 5.09 ± 0.47 kpc. Adopting the distance of the Sun to the Galactic Centre R๏ = 7.2 kpc, we derive for Camargo 439 a Galactocentric distance of RGC = 8.70 ± 0.26 kpc and a vertical distance from the plane of −4.97 ± 0.46 kpc. Camargo 438 at = 79°.66 and b = −78°.86 presents similar values. The derived parameters for these two ECs put HRK 81.4−77.8 in the halo at a distance from the Galactic Centre of ∼8.7 kpc and ∼5.0 kpc from the disc. Star clusters provide the only direct means to determine the high-latitude molecular cloud distances. The present study shows that the molecular cloud HRK 81.4−77.8 is currently forming stars, apparently an unprecedented event detected so far among high-latitude clouds. We carried out a preliminary orbit analysis. It shows that these ECs are the most distant known ECs from the plane and both cloud and clusters are probably falling ballistically from the halo on to the Galactic disc, or performing a flyby.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the Royal Astronomical Society. Oxford. Vol. 448, no. 2 (Apr. 2015), p. 1930-1936pt_BR
dc.rightsOpen Accessen
dc.subjectISM: cloudsen
dc.subjectAglomerados estelarespt_BR
dc.subjectNuvens moleculares interestelarespt_BR
dc.subjectISM: kinematics and dynamicsen
dc.subjectCinemáticapt_BR
dc.subjectOpen clusters and associations: generalen
dc.titleDiscovery of two embedded clusters with WISE in the high Galactic latitude cloud HRK 81.4−77.8pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000963655pt_BR
dc.type.originEstrangeiropt_BR


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