Multiwavelength investigation of extended green object G19.88-0.53: revealing a protocluster. Issue 4 (5th August 2020)

• Record Type: Journal Article
• Authors: Issac, Namitha; Tej, Anandmayee; Liu, Tie; Varricatt, Watson; Vig, Sarita; Ishwara Chandra, C H; Schultheis, Mathias; Nandakumar, Govind
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 497:Issue 4(2020)
• Page Start: 5454
• Page End: 5472
• Publication Date: 2020-08-05
• Subjects: stars: formation -- ISM: jets and outflows -- ISM: individual objects (G19.88-0.53) -- infrared: ISM -- infrared: stars; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/staa2301
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: A multiwavelength analysis of star formation associated with the extended green object, G19.88-0.53 is presented in this paper. With multiple detected radio and millimetre components, G19.88-0.53 unveils as harbouring a protocluster rather than a single massive young stellar object. We detect an ionized thermal jet using the upgraded Giant Meterwave Radio Telescope, India, which is found to be associated with a massive, dense and hot ALMA 2.7 mm core driving a bipolar CO outflow. Near-infrared spectroscopy with UKIRT–UIST shows the presence of multiple shock-excited H2 lines concurrent with the nature of this region. Detailed investigation of the gas kinematics using ALMA data reveals G19.88-0.53 as an active protocluster with high-mass star-forming components spanning a wide evolutionary spectrum from hot cores in accretion phase to cores driving multiple outflows to possible UCH ii regions.