1. Millimeter and far-IR study of the IRCD SDC 341.232-0.268
- Author
-
Carlos H. López-Caraballo, M. M. Vazzano, Monica Rubio, V. Firpo, Cristina Elisabeth Cappa, and N. U. Duronea
- Subjects
010504 meteorology & atmospheric sciences ,Ciencias Físicas ,_ CLUODS [ISM] ,FOS: Physical sciences ,ISM: clouds ,01 natural sciences ,individual objects: IRDC SDC341.232-0.268 [ISM] ,purl.org/becyt/ford/1 [https] ,0103 physical sciences ,010303 astronomy & astrophysics ,INDIVUDUAL OBJECTS: IRDC SDC 341.232-0.268 [ISM] ,molecules [ISM] ,0105 earth and related environmental sciences ,ISM: individual objects: IRDC SDC341.232-0.268 ,ISM: kinematics and dynamics ,Physics ,stars: formation ,formation [stars] ,Astronomy ,Astronomy and Astrophysics ,purl.org/becyt/ford/1.3 [https] ,Astrophysics - Astrophysics of Galaxies ,ISM: molecules ,Astronomía ,kinematics and dynamics [ISM] ,FORMATION [STAR] ,Space and Planetary Science ,Extinction (optical mineralogy) ,Astrophysics of Galaxies (astro-ph.GA) ,Millimeter ,dust, extinction ,) DUST, EXTINCTION [(ISM] ,clouds [ISM] ,CIENCIAS NATURALES Y EXACTAS - Abstract
We analyze the molecular gas and dust associated with the infrared dark cloud SDC341.232-0.268 in order to investigate the characteristics and parameters of the gas, determine the evolutionary status of four embedded EGO candidates, and es- tablish possible infall or outflow gas motions. We base our study on 12CO(2-1), 13CO(2-1), and C18O(2-1) data obtained with the APEX telescope, molecular data of high density tracers from the MALT90 survey and IR images from Spitzer, Herschel and ATLASGAL. The study reveals two clumps at −44 km s−1 towards the IRDC, with densities of > 104cm−3, typical of IRDCs, while high density tracers show H2 densities > 105. FIR images reveals the presence of cold dust linked to the molecular clumps and EGOs. A comparison of the spectra of the optically thin and optically thick molecular lines towards the EGOs suggests the existence of infall and outflow motions., Analizamos el gas molecular y el polvo asociado a la nube oscura infrarroja SDC341.232-0.268 con el fin de investigar las características y parámetros físicos del gas, determinar el estado evolutivo de los cuatro EGOs embebidos y establecer posibles movimientos de acreción o flujo molecular. Nos basamos en datos de 12CO(2-1), 13CO(2-1) y C18O(2-1) obtenidos con el telescopio APEX, trazadores de alta densidad extraídos de MALT90, e imágenes infrarrojas de Spitzer, Herschel y ATLASGAL. El estudio revela dos grumos moleculares a −44 km s−1 coincidentes con la IRDC con una densidad > 104cm−3, típica de IRDCs. Los trazadores de alta densidad arrojan densidades de H2 > 105. Las imágenes en el lejano IR muestran polvo frío asociado a los grumos moleculares y a los EGOs. La comparación de espectros moleculares ópticamente gruesos y finos sugiere la existencia de acreción y flujos moleculares., Facultad de Ciencias Astronómicas y Geofísicas
- Published
- 2019
- Full Text
- View/download PDF