CHARACTERIZING THE YOUNGESTHERSCHEL-DETECTED PROTOSTARS. I. ENVELOPE STRUCTURE REVEALED BY CARMA DUST CONTINUUM OBSERVATIONS
نویسندگان
چکیده
منابع مشابه
Very compact radio emission from high-mass protostars I. CRL 2136: Continuum and water maser observations
We report 5–43 GHz radio observations of the CRL 2136 region at 0.′′6 – 6′′ resolution. We detect weak (mJy intensity) radio emission from the deeply embedded high-mass protostar IRS 1, which has an optically thick spectrum up to frequencies of 22 GHz, flattening at higher frequencies, which might be explained by emission from a jet. Water maser mapping shows that the strong emission observed r...
متن کاملDust in the diffuse ISM as revealed by DIRBE observations
The weekly averaged DIRBE full sky images have been processed to separate the various components contributing to the total brightness in the various bands. The zodiacal emission, which dominates at 12 and 25 #m and the zodiacal dust scattering at ~ < 5 #m are both accounted for using an empirical fit to the data. The diffuse stellar emission which dominates at )~ < 5 #m is determined using the ...
متن کاملTesting the Evolutionary Sequence of High Mass Protostars with Carma
We present 1 resolution CARMA observations of the 3mm continuum and 95GHz CH3OH masers toward 14 candidate high mass protostellar objects (HMPOs). Dust continuum emission is detected toward seven HMPOs, and CH3OH masers toward 5 sources. The 3mm continuum sources have diameters < 2× 10AU, masses between 21 and 1200M⊙, and volume densities > 10 8 cm. Most of the 3mm continuum sources are spatial...
متن کاملCircumstellar Environments around the Youngest Protostars: Interferometric Observations and Modeling by Hsin-fang Chiang Dissertation
This thesis presents observations and modeling of nearby embedded sources in the earliest stage of protostellar evolution, i.e., Class 0 young stellar objects, using interferometric data of the Berkeley-Illinois-Maryland Association array and the Combined Array for Research in Millimeter-wave Astronomy. Protostars form through gravitational collapse inside their natal envelopes, and these circu...
متن کاملThe Evolution of Outflow-Envelope Interactions in Low-Mass Protostars
We present multi-line and continuum observations of the circumstellar environment within 10 AU of a sample of protostars to investigate how the effects of outflows on their immediate environment changes over time. CO(1-0) emission probes the high-velocity molecular outflows near the protostars and demonstrate that the outflow opening angle widens as the nascent star evolves. Maps of the CO(1-0)...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2015
ISSN: 1538-4357
DOI: 10.1088/0004-637x/798/2/128