J/ApJS/206/9 New EGOs from Spitzer GLIMPSE II survey. I. (Chen+, 2013) ================================================================================ Newly identified extended green objects (EGOs) from the Spitzer GLIMPSE II survey. I. Catalog. Chen X., Gan C.-G., Ellingsen S.P., He J.-H., Shen Z.-Q., Titmarsh A. =2013ApJS..206....9C ================================================================================ ADC_Keywords: Photometry, infrared ; Radio lines ; YSOs ; Interstellar medium Keywords: infrared: ISM - ISM: jets and outflows - radio lines: ISM - stars: formation Abstract: We have produced a catalog containing 98 newly identified massive young stellar object (MYSO) candidates associated with ongoing outflows (known as extended green objects, or EGOs). These have been identified from the Spitzer Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSE) II data set and our new identifications increase the number of known EGOs to ~400 in our Galaxy, adding to the ~300 previously identified EGOs reported by Cyganowski et al. (2008, Cat. J/AJ/136/2391) from the GLIMPSE I survey. The high detection rate (~70%) of 95 GHz class I methanol masers achieved in a survey toward 57 of these new EGOs with the Mopra 22m radio telescope demonstrates that the new EGOs are associated with outflows. Investigations of the mid-infrared properties and physical associations with other star formation tracers (e.g., infrared dark clouds, class I and II methanol masers, and millimeter Bolocam Galactic Plane Survey sources) reveal that the newly identified EGOs are very similar in nature to those in the sample of Cyganowski et al. All of the observational evidence supports the hypothesis that EGOs correspond to MYSOs at the earliest evolutionary stage, with ongoing outflow activity, and active rapid accretion. Description: We have adopted methods similar to those used by Cyganowski et al. (2008, Cat. J/AJ/136/2391) to compile a catalog of EGOs in the GLIMPSE II survey region. We displayed the archived GLIMPSE II Image Atlas mosaics (Version 3.5). We have constructed images in each of the IRAC bands (3.6, 4.5, 5.8, and 8.0um), as well as for the Spitzer Multiband Imaging Photometer (MIPS) 24um band (from the MIPS Galactic Plane Survey (MIPSGAL survey; Carey et al. 2009PASP..121...76C), and a three-color composite (3.6um-blue, 4.5um-green, and 8.0-m-red) for each of the 98 newly identified EGOs. To investigate the nature of the newly cataloged EGO sample from the GLIMPSE II survey region, we have performed a survey for molecular lines in the 3mm band toward ~60% of the sources with the ATNF Mopra 22m radio telescope. The Mopra observations consisted of a single pointing for each source and were undertaken in the period 2009 August 9-20. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 128 98 Mid-IR integrated flux densities of newly identified EGOs in the region -10{deg}