Publications (53)
Launching the asymmetric bipolar jet of DO Tau
J. Erkal, C. Dougados, D. Coffey +5
The role of bipolar jets in the formation of stars, and in particular how they are launched, is still not well understood. We probe the protostellar jet launching mechanism, via hi…
ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT) III: The interplay between gas and dust in the protoplanetary disk of DG Tau
L. Podio, A. Garufi, C. Codella +9
Planets form in protoplanetary disks and inherit their chemical composition. It is therefore crucial to understand the disks molecular content. We aim to characterize the distribut…
Hot methanol from the inner region of the HH 212 protostellar system
S. Leurini, C. Codella, S. Cabrit +9
The mechanisms leading to the formation of disks around young stellar objects (YSOs) and to the launching of the associated jets are crucial to the understanding of the earliest st…
A highly-collimated SiO jet in the HH212 protostellar outflow
C. Codella, S. Cabrit, F. Gueth +4
We mapped the HH212 Class 0 outflow in SiO(2--1, 5--4) and continuum using the PdBI in its extended configurations. The unprecedented angular resolution (down to 0.34") allows accu…
ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT). IV. Thioformaldehyde (HCS) in protoplanetary disks: spatial distributions and binding energies
C. Codella, L. Podio, A. Garufi +10
Aims: To trace the radial and vertical spatial distribution of H2CS, a key species of the S-bearing chemistry, in protoplanetary disks. To analyse the observed distributions in lig…
Organic molecules in the protoplanetary disk of DG Tau revealed by ALMA
L. Podio, F. Bacciotti, D. Fedele +10
Planets form in protoplanetary disks and inherit their chemical compositions. It is thus crucial to map the distribution and investigate the formation of simple organics, such as f…
PdBI sub-arcsecond study of the SiO microjet in HH212 - Origin and collimation of Class 0 jets
S. Cabrit, C. Codella, F. Gueth +4
The bipolar HH 212 outflow has been mapped in SiO using the extended configuration of the Plateau de Bure Interferometer (PdBI), revealing a highly collimated SiO jet closely assoc…
The H line forming region of AB Aur spatially resolved at sub-AU with the VEGA/CHARA spectro-interferometer
K. Perraut, M. Benisty, D. Mourard +19
A crucial issue in star formation is to understand the physical mechanism by which mass is accreted onto and ejected by a young star. The visible spectrometer VEGA on the CHARA arr…
Empirical determination of Einstein A-coefficient ratios of bright [Fe II] lines
T. Giannini, S. Antoniucci, B. Nisini +6
The Einstein spontaneous rates (A-coefficients) of Fe^+ lines have been computed by several authors, with results that differ from each other up to 40%. Consequently, models for li…
Classical T Tauri-like Outflow Activity in the Brown Dwarf Mass Regime
E. T. Whelan, T. P. Ray, L. Podio +2
Over the last number of years spectroscopic studies have strongly supported the assertion that protostellar accretion and outflow activity persists to the lowest masses. In this pa…
IR diagnostics of embedded jets: velocity resolved observations of the HH34 and HH1 jets
R. Garcia Lopez, B. Nisini, T. Giannini +3
We present VLT-ISAAC medium resolution spectroscopy of the HH34 and HH1 jets. Our aim is to derive the kinematics and the physical parameters and to study how they vary with jet ve…
Physical Structure and Dust Reprocessing in a sample of HH Jets
L. Podio, S. Medves, F. Bacciotti +2
We investigate the physical structure and dust reprocessing in the shocks along the beam of a number of classical Herbig-Haro jets in the Orion and Lupus molecular cloud. Spectral…
GIARPS High-resolution Observations of T Tauri stars (GHOsT). I. Jet line emission
T. Giannini, B. Nisini, S. Antoniucci +9
The mechanism for jet formation in the disks of T Tauri stars is poorly understood. Observational benchmarks to launching models can be provided by tracing the physical properties…
Searching for Brown Dwarf Outflows
E. T. Whelan, T. P. Ray, F. Bacciotti +2
As outflow activity in low mass protostars is strongly connected to ac- cretion it is reasonable to expect accreting brown dwarfs to also be driving out- flows. In the last three y…
Proper motions of radiative knots in simulations of stellar jets - An alternative to pulsating inflow conditions
F. Rubini, S. Lorusso, L. Del Zanna +1
Elongated jets from young stellar objects typically present a nodular structure, formed by a chain of bright knots of enhanced emission with individual proper motions. Though it is…
ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT) VI: Accretion shocks in the disk of DG Tau and HL Tau
A. Garufi, L. Podio, C. Codella +9
Planet-forming disks are not isolated systems. Their interaction with the surrounding medium affects their mass budget and chemical content. In the context of the ALMA-DOT program,…
ALMA polarimetric studies of rotating jet/disk systems
F. Bacciotti, J. M. Girart, M. Padovani +9
We have recently obtained polarimetric data at mm wavelengths with ALMA for the young systems DG Tau and CW Tau, for which the rotation properties of jet and disk have been investi…
POISSON project - I - Emission lines as accretion tracers in young stellar objects: results from observations of Chamaeleon I and II sources
S. Antoniucci, R. Garcia Lopez, B. Nisini +8
We present the results of the analysis of LR optical-NIR spectra (0.6-2.4 um) of a sample 47 YSOs in the ChaI and II star-forming clouds. These data are part of the POISSON project…
Time-dependent MHD shocks and line intensity ratios in the HH 30 jet: A focus on cooling function and numerical resolution
O. Tesileanu, S. Massaglia, A. Mignone +2
The coupling between time-dependent, multidimensional MHD numerical codes and radiative line emission is of utmost importance in the studies of the interplay between dynamical and…
The accretion-ejection connection in the asymmetric Th 28 jet revealed by MUSE-NFM
A. Murphy, E. T. Whelan, F. Bacciotti +5
Mass loss through stellar jets is closely tied to the process of accretion through the disk. Understanding phenomena such as episodic ejections and outflow asymmetries can thus she…
Accretion-ejection connection in the young brown dwarf candidate ISO-Cha1 217
E. T. Whelan, J. M. Alcala, F. Bacciotti +7
As the number of observed brown dwarf outflows is growing it is important to investigate how these outflows compare to the well studied jets from young stellar objects. A key point…
A MUSE Spectro-imaging Study of the Th 28 Jet: Precession in the Inner Jet
A. Murphy, C. Dougados, E. T. Whelan +5
Context: Th 28 is a Classical T Tauri star in the Lupus 3 cloud which drives an extended bipolar jet. Previous studies of the inner jet identified signatures of rotation around the…
Disks, Jets and the dawn of planets, Proceedings of the 2nd JEDI meeting
J. M. Alcala', S. Antoniucci, K. Biazzo +13
This booklet contains a collection of contributions to the meeting of the JEts and Disks at INAF (JEDI) group, which took place at the Capodimonte Observatory during 9-10 April 201…
Deuterated methanol on Solar System scale around the HH212 protostar
E. Bianchi, C. Codella, C. Ceccarelli +13
Context: Methanol is thought to be mainly formed during the prestellar phase and its deuterated form keeps memory of the conditions at that epoch. Thanks to the unique combination…
The SPHERE view of the jet and the envelope of RY Tau
A. Garufi, L. Podio, F. Bacciotti +40
Jets are rarely associated with pre-main-sequence intermediate-mass stars. Optical and near-IR observations of jet-driving sources are often hindered by the presence of a natal env…
ALMA observations of the Th 28 protostellar disk - A new example of counter-rotation between disk and optical jet
F. Louvet, C. Dougados, S. Cabrit +8
Recently, differences in Doppler shifts across the base of four close classical T Tauri star jets have been detected with the HST in optical and near-ultraviolet (NUV) emission lin…
ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT) II: Vertical stratification of CO, CS, CN, HCO, and CHOH in a Class I disk
L. Podio, A. Garufi, C. Codella +8
The chemical composition of planets is inherited from that of the protoplanetary disk at the time of planet formation. Increasing observational evidence suggests that planet format…
The kinematic relationship between disk and jet in the DG Tauri system
L. Testi, F. Bacciotti, A. I. Sargent +2
We present high angular resolution millimeter wavelength continuum and 13CO(2-1) observations of the circumstellar disk surrounding the TTauri star DG Tauri. We show that the veloc…
Investigating the nature of the extended structure around the Herbig star RCrA using integral field and high-resolution spectroscopy
E. Rigliaco, R. Gratton, D. Mesa +24
We present a detailed analysis of the extended structure detected around the young and close-by Herbig Ae/Be star RCrA. This is a young triple system with an intermediate mass cent…
Jets and Outflows From Star to Cloud: Observations Confront Theory
A. Frank, T. P. Ray, S. Cabrit +10
In this review we focus on the role jets and outflows play in the star and planet formation process. Our essential question can be posed as follows: are jets/outflows merely an epi…
PROJECT-J: JWST observations of HH46~IRS and its outflow. Overview and first results
B. Nisini, M. G. Navarro, T. Giannini +23
We present the first results of the JWST program PROJECT-J (PROtostellar JEts Cradle Tested with JWST ), designed to study the Class I source HH46 IRS and its outflow through NIRSp…
Investigating the transport of angular momentum from young stellar objects: do H2 jets from Class I YSOs rotate?
A. Chrysostomou, F. Bacciotti, B. Nisni +4
In this pilot study, we examine molecular jets from the embedded Class I sources, HH 26 and HH 72, to search, for the first time, for kinematic signatures of jet rotation from youn…
Tracing the origins of permitted emission lines in RU Lupi down to AU scales
L. Podio, P. J. V. Garcia, F. Bacciotti +4
Most of the observed emission lines and continuum excess from young accreting low mass stars (Classical T Tauri stars -- CTTSs) take place in the star-disk or inner disk region. Th…
Pre-main-sequence binaries with tidally disrupted discs: the Br gamma in HD 104237
P. J. V. Garcia, M. Benisty, C. Dougados +6
Active pre-main-sequence binaries with separations of around ten stellar radii present a wealth of phenomena unobserved in common systems. The study of these objects is extended fr…
ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT) VII: the layered molecular outflow from HL Tau and its relationship with the ringed disk
F. Bacciotti, T. Nony, L. Podio +6
The ringed disk around HL Tau stands out as the iconic signature of planet formation, but the origin of the substructures is still debated. The HL Tau system also drives a powerful…
Solving the excitation and chemical abundances in shocks: the case of HH1
T. Giannini, S. Antoniucci, B. Nisini +2
We present deep spectroscopic (3600 - 24700 A) X-shooter observations of the bright Herbig-Haro object HH1, one of the best laboratories to study the chemical and physical modifica…
Multi-scale view of star formation in IRAS 21078+5211: From clump fragmentation to disk wind
L. Moscadelli, H. Beuther, A. Ahmadi +23
In the massive star-forming region IRAS 21078+5211, a highly fragmented cluster (0.1~pc in size) of molecular cores is observed, located at the density peak of an elongated (1~pc i…
Uncovering the Outflow Driven by the Brown Dwarf LS-RCr A1: H-alpha as a Tracer of Outflow Activity in Brown Dwarfs
E. T. Whelan, T. P. Ray, F. Bacciotti
It is now apparent that classical T Tauri-like outflows commonly accompany the formation of young brown dwarfs. To date two optical outflows have been discovered and results presen…
Field Camera Unit for WSO-UV: Phase A Study Report
I. Pagano, F. Bacciotti, L. Bedin +33
World Space Observatory UltraViolet (WSO-UV) is a multipurpose space observatory, made by a 170 cm aperture telescope, capable of UV high-resolution spectroscopy, long slit low-res…
Sub-0.1" optical imaging of the Z CMa jets with SPHERE/ZIMPOL
S. Antoniucci, L. Podio, B. Nisini +15
Crucial information on the mass accretion-ejection in young stars can be obtained from high spatial resolution images of jets in sources with recurrent accretion outbursts. Using t…
The small-scale HH34 IRS jet as seen by X-shooter
B. Nisini, T. Giannini, S. Antoniucci +3
Very little information has been so far gathered on atomic jets from young embedded low mass sources (class I stars), especially in the inner jet region. We exploit multiwave spect…
Investigating the asymmetry of young stellar outflows: Combined MUSE-X-shooter study of the Th 28 jet
A. Murphy, E. T. Whelan, F. Bacciotti +7
Characterising stellar jet asymmetries is key to setting robust constraints on jet launching models and improving our understanding of the underlying mechanisms behind jet launchin…
The Bipolar X-Ray Jet of the Classical T Tauri Star DG Tau
M. Guedel, M. Audard, F. Bacciotti +18
We report on new X-ray observations of the classical T Tauri star DG Tau. DG Tau drives a collimated bi-polar jet known to be a source of X-ray emission perhaps driven by internal…
ESO-H~574 and Par-Lup3-4 Jets: Exploring the spectral, kinematical and physical properties
E. T. Whelan, R. Bonito, S. Antoniucci +7
In this paper a comprehensive analysis of VLT / X-Shooter observations of two jet systems, namely ESO-H 574 a K8 classical T Tauri star and Par-Lup 3-4 a very low mass (0.13~\M…
Water and interstellar complex organics associated with the HH 212 protostellar disc - On disc atmospheres, disc winds, and accretion shocks
C. Codella, E. Bianchi, B. Tabone +14
The HH 212 protostellar system, in Orion B, has been mapped thanks to ALMA-Band 7 Cycle 1 and Cycle 4 observations of dueterated water (HDO) and acetaldehyde (CHCHO) emission w…
PENELLOPE: the ESO data legacy program to complement the Hubble UV Legacy Library of Young Stars (ULLYSES) I. Survey presentation and accretion properties of Orion OB1 and -Orionis
C. F. Manara, A. Frasca, L. Venuti +69
The evolution of young stars and disks is driven by the interplay of several processes, notably accretion and ejection of material. Critical to correctly describe the conditions of…
An HST Imaging Survey of Low-Mass Stars in the Chamaeleon I Star Forming region
M. Robberto, L. Spina, N. Da Rio +7
We present new HST/WFPC2 observations of 20 fields centered around T Tauri stars in the Chamaeleon I star forming region. Images have been obtained in the F631N ([OI]6300A), F656N…
Physical properties of the jet from DG Tauri on sub-arcsecond scales with HST/STIS
L. Maurri, F. Bacciotti, L. Podio +5
We derive the physical properties at the base of the jet from DG Tau both along and across the flow and as a function of velocity. We analysed seven optical spectra of the DG Tau j…
Interacting Jets from Binary Protostars
G. C. Murphy, T. Lery, S. O'Sullivan +3
We investigate potential models that could explain why multiple proto-stellar systems predominantly show single jets. During their formation, stars most frequently produce energeti…
A Global Jet/Circulation Model for Young Stars
T. Lery, R. N. Henriksen, J. D. Fiege +3
Powerful, highly collimated jets, surrounded by bipolar molecular outflows, are commonly observed near Young Stellar Objects (YSOs). In the usual theoretical picture of star format…
Relating jet structure to photometric variability: the Herbig Ae star HD 163296
L. E. Ellerbroek, L. Podio, C. Dougados +21
Herbig Ae/Be stars are intermediate-mass pre-main sequence stars surrounded by circumstellar dust disks. Some are observed to produce jets, whose appearance as a sequence of shock…
HST/STIS Spectroscopy of the Optical Outflow from DG Tau: Indications for Rotation in the Initial Jet Channel
F. Bacciotti, T. P. Ray, R. Mundt +2
We have carried out a kinematical, high angular resolution (~ 0".1) study of the jet from DG Tau within 0."5 from the source (or 110 AU along this flow). We analysed line profiles…
The diagnostic potential of Fe lines applied to protostellar jets
T. Giannini, B. Nisini, S. Antoniucci +6
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 analyze…