18.118 Decoupling Theory Hw2
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منابع مشابه
Unveiling the Main Heating Sources in the Cepheus a Hw2 Region
We present high angular resolution PdBI images (beam of ∼0.33) of the J=27→26 line from several vibrational levels (v7=1 and v6=1) of HC3N toward Cepheus A HW2. These images reveal the two main heating sources in the cluster: one centered in the disk collimating the HW2 radio jet (the HW2 disk), and the other associated with a hot core 0.3 northeast HW2 (the HC). This is the first time that vib...
متن کاملA Pulsed, Precessing Jet in Cepheus A
We present near-infrared H2, radio CO, and thermal infrared observations of the nearby massive star-forming region Cepheus A (Cep A). From H2 bow shocks arranged along four distinct jet axes, we infer that the massive protostellar source HW2 drives a pulsed, precessing jet that has changed its orientation by about 45 in roughly 104 years. The current HW2 radio jet represents the most recent eve...
متن کاملMuch of the Solution Written by Afshin Rostami and Umar Syed
1. Implement AdaBoost with boosting stumps and apply the algorithm to the spambase data set of HW2 with the same training and test sets. Plot the average cross-validation error plus or minus one standard deviation as a function of the number of rounds of boosting T by selecting the value of this parameter out of {10, 102, . . . , 10k} for a suitable value of k, as in HW2. Let T ∗ be the best va...
متن کاملThe Magnetic Field in the Star-forming Region Cepheus A from H2O Maser Polarization Observations
We present linear and circular polarization observations of the H2O masers in 4 distinct regions spread over 1 × 2 arcseconds around the HW2 high-mass young stellar object in the Cepheus A star-forming region. We find magnetic fields between 100–500 mG in the central maser region, which has been argued to trace a circumstellar disk. The masers further from HW2 have field strengths between 30–10...
متن کاملHigh - resolution study of a star - forming cluster in the Cep - A HW 2 region
Context. Due to its relatively small distance (725 pc), the Cepheus A East star-forming region is an ideal laboratory to study massive star formation processes. Aims. Based on its morphology, it has been suggested that the flattened molecular gas distribution around the YSO HW2 may be a 350-AU-radius massive protostellar disk. Goal of our work is to ascertain the nature of this structure. Metho...
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تاریخ انتشار 2017