Publications (35)
ALMA observations of polarized emission toward the CW Tau and DG Tau protoplanetary disks: constraints on dust grain growth and settling
Francesca Bacciotti, Josep Miquel Girart, Marco Padovani +9
We present polarimetric data of CW Tau and DG Tau, two well-known Class II disk/jet systems, obtained with the Atacama Large Millimeter/submillimeter Array at 870 m and 0."2 av…
IR diagnostics of embedded jets: kinematics and physical characteristics of the HH46-47 jet
Rebeca Garcia Lopez, Brunella Nisini, Jochen Eisloeffel +3
We present an analysis of the kinematics and physical properties of the Class I driven jet HH46-47 based on IR medium and low resolution spectroscopy obtained with ISAAC on VLT. Ou…
PROJECT-J: the shocking H2 outflow from HH46
Maria Gabriela Navarro, Brunella Nisini, Teresa Giannini +14
We analyze the H2 emission observed in the HH46 Class I system as part of PROJECT-J (Protostellar Jets Cradle Tested with JWST), to investigate the origin and excitation of the war…
HST/STIS Observations of the Bipolar Jet from RW Aurigae: Tracing Outflow Asymmetries Close to the Source
Jens Woitas, Thomas P. Ray, Francesca Bacciotti +2
We have observed the bipolar jet from RW Aur A with STIS on board the HST. After continuum subtraction, morphological and kinematic properties of this outflow can be traced to with…
Recipes for stellar jets: results of combined optical/infrared diagnostics
Linda Podio, Francesca Bacciotti, Brunella Nisini +4
We examine the conditions of the plasma along a sample of 'classical' Herbig-Haro jets located in the Orion and Vela star forming regions, through combined optical-infrared spectra…
Probing jets from young embedded sources: clues from HST near-IR [Fe II] images
Jessica Erkal, Brunella Nisini, Deirdre Coffey +6
We present near-infrared [Fe II] images of four Class 0/I jets (HH 1/2, HH 34, HH 111, HH 46/47) observed with the Hubble Space Telescope Wide Field Camera 3. The unprecedented ang…
Searching for Jet Rotation in Class 0/I Sources observed with GEMINI/GNIRS
Deirdre Coffey, Francesca Bacciotti, Antonio Chrysostomou +2
In recent years, there has been a number of detections of gradients in the radial velocity profile across jets from young stars. The significance of these results is considerable.…
A Search for Consistent Jet and Disk Rotation Signatures in RY Tau
Deirdre Coffey, Catherine Dougados, Sylvie Cabrit +2
We present a radial velocity study of the RY Tau jet-disk system, designed to determine whether a transfer of angular momentum from disk to jet can be observed. Many recent studies…
Further Indications of Jet Rotation in New Ultraviolet and Optical HST/STIS Spectra
Deirdre Coffey, Francesca Bacciotti, Thomas P. Ray +2
We present survey results which suggest rotation signatures at the base of T-Tauri jets. Observations were conducted with the Hubble Space Telescope Imaging Spectrograph at optical…
HST/STIS observations of the RW Aurigae bipolar jet: mapping the physical parameters close to the source
Stanislav Melnikov, Jochen Eislöffel, Francesca Bacciotti +2
We present the results of new spectral diagnostic investigations applied to high-resolution long-slit spectra of the RW Aur bipolar jet obtained with HST/STIS. The spectra include…
A combined optical/infrared spectral diagnostic analysis of the HH1 jet
Brunella Nisini, Francesca Bacciotti, Teresa Giannini +4
Complete flux-calibrated spectra covering the spectral range from 6000 A to 2.5 um have been obtained along the HH1 jet and analysed in order to explore the potential of a combined…
Numerical simulations of radiative magnetized Herbig-Haro jets: the influence of pre-ionization from X-rays on emission lines
Ovidiu Tesileanu, Andrea Mignone, Silvano Massaglia +1
We investigate supersonic, axisymmetric magnetohydrodynamic (MHD) jets with a time-dependent injection velocity by numerical simulations with the PLUTO code. Using a comprehensive…
T Tauri Jet Physics Resolved Near The Launching Region with the Hubble Space Telescope
Deirdre Coffey, Francesca Bacciotti, Linda Podio
We present an analysis of the gas physics at the base of jets from five T Tauri stars based on high angular resolution optical spectra, using the Hubble Space Telescope Imaging Spe…
Three-fluid plasmas in star formation I. Magneto-hydrodynamic equations
Cecilia Pinto, Daniele Galli, Francesca Bacciotti
Interstellar magnetic fields influence all stages of the process of star formation, from the collapse of molecular cloud cores to the formation of protostellar jets. This requires…
Ionized gas emission in protoplanetary disks with the SKAO
Greta Guidi, Christian Rab, Barbara Ercolano +20
Protoplanetary disks represent a crucial stage in the evolution of Young Stellar Objects towards the formation of fully formed planetary systems. While substantial progress has bee…
ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT): I. CO, CS, CN, and H2CO around DG Tau B
Antonio Garufi, Linda Podio, Claudio Codella +7
The chemical composition of planets is inherited by the distribution of the various molecular species in the protoplanetary disk at thetime of their formation. As of today, only a…
ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT) V: Sample, overview, and demography of disk molecular emission
Antonio Garufi, Linda Podio, Claudio Codella +9
We present an overview of the ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT), a campaign devoted to the characterization of the molecular emission from partly em…
Rotation of Jets from Young Stars: New Clues from the Hubble Space Telescope Imaging Spectrograph
Deirdre Coffey, Francesca Bacciotti, Jens Woitas +2
We report findings from the first set of data in a current survey to establish conclusively whether jets from young stars rotate. We observed the bi-polar jets from the T Tauri sta…
Jets and Outflows in Young Stellar Objects with the SKAO
Giovanni Sabatini, Gemma Busquet, Carlos Carrasco-González +48
Jets and outflows are ubiquitous phenomena associated with the formation of young stellar objects (YSOs). They play a crucial role in removing angular momentum from the accreting s…
HST/STIS spectroscopy of the optical outflow from DG Tau: structure and kinematics on sub-arcsecond scales
Francesca Bacciotti, Reinhard Mundt, Thomas P. Ray +3
We have carried out a spatio-kinematic study of the outflow from the classical T Tauri star DG Tau using the Space Telescope Imaging Spectrograph (STIS) on board the Hubble Space T…
Brown Dwarf Jets: Investigating the Universality of Jet Launching Mechanisms at the Lowest Masses
Emma Teresa Whelan, Francesca Bacciotti, Tom Ray +1
Recently it has become apparent that proto-stellar-like outflow activity extends to the brown dwarf (BD) mass regime. While the presence of accretion appears to be the common ingre…
Numerical simulations of stellar jets and comparison between synthetic and observed maps: clues to the launch mechanism
Francesco Rubini, Lorenzo Maurri, Gabriele Inghirami +2
High angular resolution spectra obtained with the Hubble Space Telescope Imaging Spectrograph (HST/STIS) provide rich morphological and kinematical information about the stellar je…
Jet rotation: launching region, angular momentum balance and magnetic properties in the bipolar outflow from RW Aur
Jens Woitas, Francesca Bacciotti, Thomas P. Ray +3
Using STIS on board the HST we have obtained a spectroscopic map of the bipolar jet from RW Aur. We find signatures of rotation within the first 300 AU of the jet (1.''5 from RW Au…
Protostellar Outflows at the EarliesT Stages (POETS). IV. Statistical properties of the 22 GHz H2O masers
Luca Moscadelli, Alberto Sanna, Ciriaco Goddi +3
We wish to perform a statistical study of the location and motion of individual 22 GHz water maser cloudlets, characterized by sizes that are within a few au, with respect to the r…
Polarization in Disks
Ian Stephens, Zhi-Yun Li, Haifeng Yang +24
Polarized dust emission outside of disks reveal the magnetic field morphology of molecular clouds. Within disks, however, polarized dust emission can arise from very different mech…
Spatially Resolved Observations of the Bipolar Optical Outflow from the Brown Dwarf 2MASSJ12073347-3932540
Emma Whelan, Tom Ray, Fernando Comeron +2
Studies of brown dwarf (BD) outflows provide information pertinent to questions on BD formation, as well as allowing outflow mechanisms to be investigated at the lowest masses. Her…
A resolved outflow of matter from a Brown Dwarf
Emma T. Whelan, Thomas P. Ray, Francesca Bacciotti +3
The birth of stars involves not only accretion but also, counter-intuitively, the expulsion of matter in the form of highly supersonic outflows. Although this phenomenon has been s…
Jet rotation investigated in the near-ultraviolet with HST/STIS
Deirdre Coffey, Elisabetta Rigliaco, Francesca Bacciotti +2
We present results of the second phase of our near-ultraviolet investigation into protostellar jet rotation using HST/STIS. We obtain long-slit spectra at the base of five T Tauri…
SHARK-NIR, the coronagraphic camera for LBT, moving toward construction
Jacopo Farinato, Francesca Bacciotti, Carlo Baffa +37
SHARK-NIR is one of the two coronagraphic instruments proposed for the Large Binocular Telescope. Together with SHARK-VIS (performing coronagraphic imaging in the visible domain),…
A HST study of the environment of the Herbig Ae/Be star LkHa 233 and its bipolar jet
Stanislav Yu. Melnikov, Jens Woitas, Jochen Eislöffel +3
We present the results of HST/STIS and WFPC2 observations of LkHa 233 and its environment. LkHa233 is a Herbig Ae/Be star with a collimated bipolar jet. We investigate optical forb…
Hydrogen permitted lines in the first near-IR spectra of Th 28 microjet: accretion or ejection tracers?
Deirdre Coffey, Francesca Bacciotti, Linda Podio +1
We report the first near-infrared detection of the bipolar microjet from TTauri star ThA 15-28 (aka Th 28). Spectra were obtained with VLT/ISAAC for the slit both perpendicular and…
The First X-shooter Observations of Jets from Young Stars
Francesca Bacciotti, Emma T. Whelan, Juan M. Alcala' +5
We present the first pilot study of jets from young stars conducted with X-shooter, on ESO/VLT. As it offers simultaneous, high quality spectra in the range 300-2500 nm X-shooter i…
Toward Resolving the Outflow Engine: An Observational Perspective
Tom Ray, Catherine Dougados, Francesca Bacciotti +2
Jets from young stars represent one of the most striking signposts of star formation. The phenomenon has been researched for over two decades and there is now general agreement tha…
Protostellar Outflows at the EarliesT Stages (POETS). III. H2O masers tracing disk-winds and jets near luminous YSOs
Luca Moscadelli, Alberto Sanna, Ciriaco Goddi +3
The goal of the Protostellar Outflows at the EarliesT Stages (POETS) survey is to image the disk-outflow interface on scales of 10-100 au in a statistically significant sample (36)…
Tracing kinematical and physical asymmetries in the jet from DG Tau B
Linda Podio, Jochen Eisloeffel, Stanislav Melnikov +2
Stellar jets can be highly asymmetric and have multiple velocity components. To clarify the origin of jet asymmetries and constrain their launch mechanism we study the physical and…