47 citations · 306 across the 20 of their papers we have counts for
20 papers
Long-Term X-ray Variability on the Benchmark YSO HL Tau
Steven M. Silverberg, Scott J. Wolk, David A. Principe +4
HL Tau is one of the most well-studied Class I young stellar objects, including frequent observations at near- and mid-infrared, (sub-) millimeter, and X-ray wavelengths. We presen…
Discovery of a jet from the single HAe/Be star HD 100546
P. C. Schneider, C. Dougados, E. T. Whelan +6
Young accreting stars drive outflows that collimate into jets, which can be seen hundreds of au from their driving sources. Accretion and outflow activity cease with system age, an…
The UV Perspective of Low-Mass Star Formation
P. C. Schneider, H. M. Günther, K. France
The formation of low-mass stars in molecular clouds involves accretion disks and jets, which are of broad astrophysical interest. Accreting stars represent the closest examples of…
Spatially resolved velocity structure in jets of DF Tau and UY Aur A
Anastasiia V Uvarova, Hans Moritz Günther, David A. Principe +1
Young stars accrete mass and angular momentum from their circumstellar disks. Some of them also drive outflows, which can be distinguished in optical forbidden emission lines (FELs…
Probing UV-Sensitive Pathways for CN and HCN Formation in Protoplanetary Disks with the Hubble Space Telescope
Nicole Arulanantham, K. France, P. Cazzoletti +6
The UV radiation field is a critical regulator of gas-phase chemistry in surface layers of disks around young stars. In an effort to understand the relationship between photocataly…
Optical dimming of RW Aur associated with an iron rich corona and exceptionally high absorbing column density
Hans Moritz Günther, T. Birnstiel, D. P. Huenemoerder +7
RW Aur is a binary system composed of two young, low-mass stars. The primary, RW Aur A, has undergone visual dimming events (~mag) in 2011, 2014-16, and 2017-2018. Visual…
Multiepoch, multiwavelength study of accretion onto T Tauri: X-ray versus optical and UV accretion tracers
P. C. Schneider, H. M. Günther, J. Robrade +2
Classical T Tauri stars (CTTSs) accrete matter from the inner edge of their surrounding circumstellar disks. The impact of the accretion material on the stellar atmosphere results…
A UV-to-NIR Study of Molecular Gas in the Dust Cavity Around RY Lupi
N. Arulanantham, K. France, K. Hoadley +10
We present a study of molecular gas in the inner disk around RY Lupi, with spectra from HST-COS, HST-STIS, and VLT-CRIRES. We model the radial d…
Violent environment of the inner disk of RW Aur A probed by the 2010 and 2015 dimming events
S. Facchini, C. F. Manara, P. C. Schneider +5
RW Aur is a young binary system showing strong signatures of a recent tidal encounter between the circumprimary disk and the secondary star. The primary star has recently undergone…
The nature of the 2014-2015 dim state of RW Aur revealed by X-ray, optical, and NIR observations
P. C. Schneider, H. M. Günther, J. Robrade +7
The binary system RW Aur consists of two classical T~Tauri stars (CTTSs). The primary recently underwent its second observed major dimming event (mag). We present new,…
Recollimation boundary layers as X-ray sources in young stellar jets
Hans Moritz Günther, Zhi-Yun Li, P. C. Schneider
Young stars accrete mass from circumstellar disks and in many cases, the accretion coincides with a phase of massive outflows, which can be highly collimated. Those jets emit predo…
HST FUV monitoring of TW Hya
H. M. Günther, N. S. Brickhouse, A. K. Dupree +3
Classical T Tauri stars (CTTS) are young (< 10 Myr), cool stars that actively accrete matter from a disk. They show strong, broad and asymmetric, atomic FUV emission lines. Neither…
HST FUV imaging of DG Tau: Fluorescent molecular hydrogen emission from the wide angle outflow
P. C. Schneider, J. Eisloeffel, M. Guedel +4
One of the best-studied jets from all young stellar objects is the jet of DG Tau, which we imaged in the FUV with HST for the first time. These high spatial resolution images were…
The evolution of the jet from Herbig Ae star HD 163296 from 1999 to 2011
H. M. Günther, P. C. Schneider, Z. -Y. Li
Young A and B stars, the so-called Herbig Ae/Be stars (HAeBe), are surrounded by an active accretion disk and drive outflows. We study the jet HH 409, which is launched from the HA…
HST FUV C IV observations of the hot DG Tauri jet
P. C. Schneider, J. Eisloeffel, M. Guedel +4
Protostellar jets are tightly connected to the accretion process and regulate the angular momentum balance of accreting star-disk systems. The DG Tau jet is one of the best-studied…
The evolution of the X-ray emission of HH 2 - Investigating heating and cooling processes
P. C. Schneider, H. M. Guenther, J. H. M. M. Schmitt
Young stellar objects often drive powerful bipolar outflows which evolve on time scales of a few years. An increasing number of these outflows has been detected in X-rays implying…
The X-ray puzzle of the L1551 IRS 5 jet
P. C. Schneider, H. M. Guenther, J. H. M. M. Schmitt
Protostars are actively accreting matter and they drive spectacular, dynamic outflows, which evolve on timescales of years. X-ray emission from these jets has been detected only in…
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…
The Chandra X-ray view of the power sources in Cepheus A
P. C. Schneider, H. M. Guenther, J. H. M. M. Schmitt
The central part of the massive star-forming region Cepheus A contains several radio sources which indicate multiple outflow phenomena, yet the driving sources of the individual ou…
Chandra observation of Cepheus A: The diffuse emission of HH 168 resolved
P. C. Schneider, H. M. Guenther, J. H. M. M. Schmitt
X-ray emission from massive stellar outflows has been detected in several cases. We present a Chandra observation of HH 168 and show that the soft X-ray emission from a plasma of 0…