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There is clear observational evidence that the main Class 0/I stages of the star formation process are associated with powerful collimated outflows (jets), which sometimes propagate up to distances as large as $10^{4-5}$ au scales in…

Solar and Stellar Astrophysics · Physics 2025-11-25 A. Rodríguez-González , P. R. Rivera-Ortiz , Z. Meliani , E. Alquicira-Peláez , A. Durán , Luis A. Zapata

We investigate the diagnostic capabilities of the iron lines for tracing the physical conditions of the shock-excited gas in jets driven by pre-main sequence stars. We have analyzed the 300-2500 nm X-shooter spectra of two jets driven by…

Astrophysics of Galaxies · Physics 2015-06-17 T. Giannini , B. Nisini , S. Antoniucci , J. M. Alcala' , F. Bacciotti , R. Bonito , L. Podio , B. Stelzer , E. T. Whelan

We present ${\sim}0.2$ arcsec ($\sim$80 au) resolution observations of the CO (2-1) and SiO (5-4) lines made with the Atacama large millimeter/submillimeter array toward an extremely young intermediate-mass protostellar source (t$_{\rm…

The HH 24 complex harbors five collimated jets emanating from a small protostellar multiple system. We have carried out a multi-wavelength study of the jets, their driving sources, and the cloud core hosting the embedded stellar system,…

Solar and Stellar Astrophysics · Physics 2023-04-26 Bo Reipurth , J. Bally , Hsi-Wei Yen , H. G. Arce , L. -F. Rodriguez , A. C. Raga , T. R. Geballe , R. Rao , F. Comeron , S. Mikkola , C. A. Aspin , J. Walawender

We present Space Telescope Imaging Spectrograph (STIS) spectral images of the HH~30 stellar jet taken through a wide slit over two epochs. The jet is unresolved spectrally, so the observations produce emission-line images for each line in…

Astrophysics · Physics 2011-02-11 P. Hartigan , J. Morse

We have used the axisymmetric chemo-hydrodynamical code WALKIMYA-2D to numerically model and reproduce the physical and CO emission properties of the jet-driven outflow from the intermediate-mass protostar Cep E, which was observed at $\sim…

Solar and Stellar Astrophysics · Physics 2023-04-12 P. R. Rivera-Ortiz , A. de A. Schutzer , B. Lefloch , A. Gusdorf

We present a survey of H2 jets from young protostars in the Vela-D molecular cloud (VMR-D), based on Spitzer -IRAC data between 3.6 and 8.0 micron. Our search has led to the identification of 15 jets and about 70 well aligned knots within…

Astrophysics of Galaxies · Physics 2015-06-15 T. Giannini , D. Lorenzetti , M. De Luca , F. Strafella , D. Elia , B. Maiolo , M. Marengo , Y. Maruccia , F. Massi , B. Nisini , L. Olmi , A. Salama , H. A. Smith

We report the detection of a broad 22 microns emission feature in the Carina nebula H II region by the Infrared Space Observatory (ISO) Short Wavelength Spectrometer. The feature shape is similar to that of the 22 microns emission feature…

Astrophysics · Physics 2009-10-31 K. -W. Chan , T. Onaka

The B335 protostar has undergone a major outburst detected in the scattered light of its outflow cavity that has not yet ended. B335 therefore offers the rare opportunity to study its effect on the jet of a protostellar object. Photometry…

We present molecular line observations of the protostellar outflow associated with HH270mms1 in the Orion B molecular cloud with ALMA. The 12CO(J = 3 - 2) emissions show that the outflow velocity structure consists of four distinct…

Astrophysics of Galaxies · Physics 2024-03-19 Mitsuki Omura , Kazuki Tokuda , Masahiro N. Machida

We have mapped [Ne II] (12.8um) and [S IV] (10.5um) emission from W51 IRS 2 with TEXES on Gemini North, and we compare these data to VLA free-free observations and VLT near-infrared images. With 0.5" spatial and 4 km/s spectral resolution…

We present observations from the Gaia-ESO Survey in the lines of H$\alpha$, [N II], [S II] and He I of nebular emission in the central part of the Carina Nebula. We investigate the properties of the two already known kinematic components…

We present new MUSE/VLT observations of a small globule in the Carina H II region that hosts the HH 900 jet+outflow system. Data were obtained with the GALACSI ground-layer adaptive optics system in wide-field mode, providing…

Astrophysics of Galaxies · Physics 2019-10-09 Megan Reiter , Anna F. McLeod , Pamela D. Klaassen , Andrés E. Guzmán , J. E. Dale , Joseph C. Mottram , Guido Garay

We present the first detection of spatially resolved protostellar outflows and jets in the outer Galaxy. We observed five star-forming regions in the outer Galaxy (Sh 2--283, NOMF05-16/19/23/63; galactocentric distance = 15.7--17.4 kpc)…

We present high sensitivity and high angular resolution images of the high velocity (vLSR>30kms^-1) CO emission in the J=1-0 and J=2-1 lines of the Orion KL region. These results reveal the morphology of the high-velocity CO emission at the…

Astrophysics · Physics 2007-05-23 A. Rodriguez-Franco , J. Martin-Pintado , T. L. Wilson

Optical and ultraviolet observations of the Type IIn supernova 1995N at epochs between 321 and 1799 days after the explosion show three distinct velocity components. The narrow lines come from circumstellar gas and show both low and high…

We report on the detection of an atomic jet associated with the protostellar source SMM1 (FIRS1) in Serpens. The jet is revealed in [FeII] and [NeII] line maps observed with Spitzer/IRS, and further confirmed in HiRes IRAC and MIPS images.…

Astrophysics of Galaxies · Physics 2014-03-05 O. Dionatos , J. K. Jørgensen , P. S. Teixeira , M. Güdel , E. Bergin

Context: High-resolution studies of class 0 protostars represent the key to constraining protostar formation models. VLA16234-2417 represents the prototype of class 0 protostars, and it has been recently identified as a triple non-coeval…

Astrophysics of Galaxies · Physics 2015-09-16 G. Santangelo , N. M. Murillo , B. Nisini , C. Codella , S. Bruderer , S. -P. Lai , E. F. van Dishoeck

We present new infrared data from a survey for embedded protostellar jets in the Orion A cloud. This survey makes use of the S(1) v = 1-0 line of molecular hydrogen at lambda = 2.12 mum to search for infrared jets deep inside the cloud and…

Astrophysics · Physics 2007-05-23 Thomas Stanke , Mark J. McCaughrean , Hans Zinnecker
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