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Related papers: Multi-wavelength spectroscopy of the bipolar outfl…

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Long slit spectra of the molecular outflow Herbig-Haro (HH) 46/47 has been taken in the J and K near-infrared bands. The observed H2 line emission confirms the existence of a bright and extended redshifted counter-jet outflow southwest of…

Astrophysics · Physics 2009-10-31 Amadeu Fernandes

We have mapped the proto-binary source IRAS 16293-2422 in CO 2-1, 13CO 2-1, and CO 3-2 with the Submillimeter Array (SMA). The maps with resolution of 1".5-5" reveal a single small scale (~3000 AU) bipolar molecular outflow along the…

The opening angles of some protostellar outflows appear too narrow to match the expected core-star mass efficiency SFE = 0.3-0.5 if outflow cavity volume traces outflow mass, with a conical shape and a maximum opening angle near 90 deg.…

Astrophysics of Galaxies · Physics 2023-05-31 Philip C. Myers , Michael M. Dunham , Ian W. Stephens

As part of the ALMA Large Program "Early Planet Formation in Embedded Disks" (eDisk), 12CO (2 - 1) was observed towards 19 nearby low-mass protostars. Of these objects, 15 sources are found to show molecular outflow emission. Based on their…

Context. A small group of bipolar protostellar outflows display strong emission from shock-tracer molecules such as SiO and CH3OH, and are generally referred to as "chemically active." The best-studied outflow from this group is the one in…

Astrophysics of Galaxies · Physics 2015-06-15 M. Tafalla , A. Hacar

We report the results of spectroscopic mapping observations carried out toward protostellar outflows in the BHR71, L1157, L1448, NGC 2071, and VLA 1623 molecular regions using the Infrared Spectrograph (IRS) of the Spitzer Space Telescope.…

We want to investigate the influence of the powerful outflow driven by the hot core Sgr B2(N1) on the gas molecular inventory of the surrounding medium. We used the data taken as part of the 3 mm imaging spectral-line survey ReMoCA…

Astrophysics of Galaxies · Physics 2024-11-26 Laura A. Busch , Arnaud Belloche , Robin T. Garrod , Holger S. P. Müller , Karl M. Menten

We present the first results of the unbiased survey of the L1157-B1 bow shock, obtained with HIFI in the framework of the key program Chemical Herschel surveys of star forming regions (CHESS). The L1157 outflow is driven by a low-mass Class…

Astrophysics of Galaxies · Physics 2015-05-19 C. Codella , B. Lefloch , C. Ceccarelli , CHESS Team , HIFI Team

We present near infrared (IR) spectra (0.98--2.5 mu m) from the group of Herbig-Haro (HH) objects comprising HH99: a series of knots forming a bow, HH99B, and a separate knot, HH99A. Observations of H2, [Fe II] and [C I] are used to…

Astrophysics · Physics 2009-11-10 C. McCoey , T. Giannini , D. R. Flower , A. Caratti o Garatti

We present Northern Extended Millimeter Array (NOEMA) observations of the CO (2-1) molecular gas kinematics in the nearby Compton-thick Seyfert 2 galaxy NGC 3079, with an angular resolution of 0.5" ($\sim$40 pc). To interpret the observed…

Aims. Young stars interact vigorously with their surroundings, as evident from the highly rotationally excited CO (up to Eup=4000 K) and H2O emission (up to 600 K) detected by the Herschel Space Observatory in embedded low-mass protostars.…

Solar and Stellar Astrophysics · Physics 2015-05-30 R. Visser , L. E. Kristensen , S. Bruderer , E. F. van Dishoeck , G. J. Herczeg , C. Brinch , S. D. Doty , D. Harsono , M. G. Wolfire

We report the detection of a molecular outflow driven by the brown dwarf binary FU Tau. Using the IRAM 30 m telescope we observed the $^{12}$CO(2-1) (CO) emission in the vicinity of FU Tau and detected a bipolar outflow by examining the…

Solar and Stellar Astrophysics · Physics 2015-06-12 J. -L. Monin , E. Whelan , B. Lefloch , C. Dougados , C. Alves de Oliveira

Motivated by the observations of several infrared-excess bow-shock sources and proplyd-like objects near the Galactic centre, we analyse the effect of a potential outflow from the centre on bow shock properties. We show that due to the…

We present the results of a multiline survey at mm-wavelengths of the Cepheus A star forming region. Four main flows have been identified: three pointing in the SW, NE, and SE directions and accelerating high density CS clumps. The fourth…

Astrophysics · Physics 2009-11-11 C. Codella , R. Bachiller , M. Benedettini , P. Caselli , S. Viti , V. Wakelam

Outflows generated by protostars heavily affect the kinematics and chemistry of the hosting molecular cloud through strong shocks that enhance the abundance of some molecules. L1157 is the prototype of chemically active outflows, and a…

We present high sensitivity 12/13CO(1-0) molecular line maps covering the full extent of the parsec scale L1551 molecular outflow, including the redshifted east-west (EW) flow. We also present 12CO(3-2) data that extends over a good…

Astrophysics · Physics 2008-11-26 Irena Stojimirović , Gopal Narayanan , Ronald L. Snell , John Bally

Outflows play a key role in the star and planet formation processes. Some outflows show discrete clumps of cold molecular gas moving at extremely high velocities (EHVs) of $\sim$100 km s$^{-1}$, known as ''molecular bullets'', that are…

We present new 230 GHz Submillimeter Array observations of the candidate first hydrostatic core Per-Bolo 58. We report the detection of a 1.3 mm continuum source and a bipolar molecular outflow, both centered on the position of the…

Astrophysics of Galaxies · Physics 2015-05-30 Michael M. Dunham , Xuepeng Chen , Hector G. Arce , Tyler L. Bourke , Scott Schnee , Melissa L. Enoch

We report here our latest search for molecular outflows from young brown dwarfs and very low-mass stars in nearby star-forming regions. We have observed three sources in Taurus with the Submillimeter Array and the Combined Array for…

Solar and Stellar Astrophysics · Physics 2015-06-22 Ngoc Phan-Bao , Chin-Fei Lee , Paul T. P. Ho , Cuong Dang-Duc , Di Li

We present far-infrared maps and spectroscopy for a number of deeply embedded protostellar objects (CepE, HH211-MM, IC1396W, L1157, L1211, and RNO15FIR) from data that we acquired with the ISO instruments PHOT and LWS. Several previously…

Astrophysics · Physics 2009-11-10 D. Froebrich , M. D. Smith , K. W. Hodapp , J. Eislöffel