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标题：ALMA Observations of the Extraordinary Carina Pillars: HH 901/902
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作者：Geovanni Cortes-Rangel ; Luis A.Zapata ; Jesús A.Toalá 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2020
卷号：159
期号：2
页码：864-871
DOI：10.3847/1538-3881/ab6295
语种：English
出版社：American Institute of Physics
摘要：We present Atacama Large Millimeter/Submillimeter Array 1.3 mm continuum and C18O(2−1), N2D+(3−2), 13CS(5−4), and 12CO(2−1) line sensitive and high angular resolution (~0farcs3) observations of the famous Carina pillars and protostellar objects HH 901/902.Our observations reveal for the first time, the bipolar CO outflows and the dusty disks (plus envelopes) that are energizing the extended and irradiated Herbig–Haro (HH) objects far from the pillars.We find that the masses of the disks+envelopes are about 0.1 M⊙ and that the bipolar outflows are between 10−3 and 10−4 M⊙, which suggests that they could be low- or maybe intermediate-mass protostars.Moreover, we suggest that these young low-mass stars are likely embedded Class 0/I protostars with high-accretion rates.We also show the kinematics of the gas in the pillars together with their respective gas masses (0.1–0.2 M⊙).We estimate that the pillars will be photoevaporated in 104 to 105 yr by the massive and luminous stars located in the Trumpler 14 cluster.Finally, given the short photoevaporated timescales and that the protostars in these pillars are still very embedded, we suggest that the disks inside of the pillars will be quickly affected by the radiation of the massive stars, forming proplyds, like those observed in Orion.
关键词：Proplyds;Interstellar molecules;Aperture synthesis;Stellar jets