372 citations · 3k across the 72 of their papers we have counts for
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X-ray Irradiation of the Giant Planet Orbiting the T Tauri Star TAP 26
Stephen L. Skinner, Manuel Guedel
We present new Chandra X-ray observations of TAP 26, a ~17 Myr old magnetically-active weak-lined T Tauri star that has been reported to host a massive planet in a 10.8 day orbit.…
X-ray Observations of the Enigmatic Wolf-Rayet System Theta Mus: Two's Company But Three's a Crowd
Stephen L. Skinner, Svetozar A. Zhekov, Manuel Guedel +1
Theta Mus is a remarkable spectroscopic binary (SB) consisting of a carbon-type Wolf-Rayet star and OV companion (WC6+O6-7V) in a 19-day orbit. In addition an O-supergiant is visua…
HST UV Spectroscopy of the Planet-Hosting T Tauri Star PDS 70
Stephen L. Skinner, Marc Audard
We summarize Hubble Space Telescope (HST) UV observations of the weak-lined T Tauri star (wTTS) PDS 70 obtained with the Space Telescope Imaging Spectrograph (STIS). These observat…
Chandra X-ray Observations of V830 Tau: A T Tauri Star Hosting an Evanescent Planet
Stephen L. Skinner, Manuel Guedel
A radial velocity study by Donati et al. (2016) reported the detection of a close-in giant planet in a 4.93 d orbit around the ~2 Myr old weak-lined T Tauri star V830 Tau. Because…
Chandra Resolves the Double FU Orionis System RNO 1B/1C in X-rays
Stephen L. Skinner, Manuel Guedel
We present new Chandra X-ray observations of the close pair of young stars RNO 1B and 1C (6 separation) located in the L1287 cloud. RNO 1B erupted in 1978 - 1990 and is classif…
X-ray Emission and Disk Irradiation of HL Tau and HD 100546
Stephen L. Skinner, Manuel Guedel
We present new X-ray observations of the optically-obscured protostar HL Tau and the intermediate mass Herbig Be star HD 100546. Both objects are surrounded by spectacular disks sh…
High Energy Processes in Wolf-Rayet Stars
Stephen L. Skinner, Werner Schmutz, Manuel Guedel +1
Wolf-Rayet (WR) stars are massive (10 M) evolved stars undergoing advanced nuclear burning in their cores, rapidly approaching the end of their lives as supernovae.…
Chandra Observations of the Massive Star-Forming Region Onsala 2
Stephen L. Skinner, Kimberly R. Sokal, Manuel Guedel
Previous radio and infrared observations have revealed an obscured region of high-mass star formation in Cygnus known as Onsala 2 (ON 2). Within this region lies the optically-reve…
ALMA detects a radial disk wind in DG Tau
M. Guedel, C. Eibensteiner, O. Dionatos +7
Aims: We aim to use the high spatial resolution of the Atacama Large Millimeter/submillimeter Array (ALMA) to map the flow pattern of molecular gas near DG Tau and its disk, a youn…
Resolving the Inner Arcsecond of the RY Tau Jet With HST
S. L. Skinner, P. C. Schneider, M. Audard +1
Faint X-ray emission from hot plasma (T > 1 MK) has been detected extending outward a few arcseconds along the optically-delineated jets of some classical T Tauri stars including R…
XMM-Newton X-ray Observations of LkCa 15: A T Tauri Star With a Formative Planetary System
Stephen L. Skinner, Manuel Guedel
High-resolution ground-based images of the T Tauri star LkCa 15 have revealed multiple companions that are thought to comprise a formative planetary system. The candidate protoplan…
Radio emission and mass loss rate limits of four young solar-type stars
Bibiana Fichtinger, Manuel Güdel, Robert L. Mutel +5
Observations of free-free continuum radio emission of four young main-sequence solar-type stars (EK Dra, Pi1 UMa, Chi1 Ori; and Kappa1 Cet) are studied to detect stellar winds or a…
Chandra and XMM-Newton X-ray Observations of the Hyperactive T Tauri Star RY Tau
Stephen L. Skinner, Marc Audard, Manuel Guedel
We present results of pointed X-ray observations of the accreting jet-driving T Tauri star RY Tau using Chandra and XMM-Newton. We obtained high-resolution grating spectra and exce…
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,…
A Chandra Observation of the Eclipsing Wolf-Rayet Binary CQ Cep
S. L. Skinner, S. A. Zhekov, M. Guedel +1
The short-period (1.64 d) near-contact eclipsing WN6+O9 binary system CQ Cep provides an ideal laboratory for testing the predictions of X-ray colliding wind shock theory at close…
X-ray emission from an FU Ori star in early outburst: HBC 722
Armin Liebhart, Manuel Guedel, Stephen Skinner +1
Aims: We conducted the first X-ray observations of the newly erupting FU Ori-type outburst in HBC 722 (V2493 Cyg) with the aim to characterize its X-ray behavior and near-stellar e…
Chandra Resolves the T Tauri Binary System RW Aur
Stephen L. Skinner, Manuel Guedel
RW Aur is a multiple T Tauri system consisting of an early-K type primary (A) and a K5 companion (B) at a separation of 1.4 arcsec. RW Aur A drives a bipolar optical jet that is we…
An X-ray and Infrared Survey of the Lynds 1228 Cloud Core
Stephen Skinner, Luisa Rebull, Manuel Guedel
The nearby Lynds 1228 (L1228) dark cloud at a distance of ~200 pc is known to harbor several young stars including the driving sources of the giant HH 199 and HH 200 Herbig-Haro ou…
Episodic Accretion in Young Stars
Marc Audard, Péter Ábrahám, Michael M. Dunham +10
In the last twenty years, the topic of episodic accretion has gained significant interest in the star formation community. It is now viewed as a common, though still poorly underst…
An Analysis of the Environments of FU Orionis Objects with Herschel
Joel D. Green, Neal J. Evans, 'Agnes K'osp'al +13
We present Herschel-HIFI, SPIRE, and PACS 50-670 μm imaging and spectroscopy of six FU Orionis-type objects and candidates (FU Orionis, V1735 Cyg, V1515 Cyg, V1057 Cyg, V1331 Cyg,…
X-ray Irradiation of the LkCa 15 Protoplanetary Disk
Stephen L. Skinner, Manuel Guedel
LkCa 15 in the Taurus star-forming region has recently gained attention as the first accreting T Tauri star likely to host a young protoplanet. High spatial resolution infrared obs…
VLA Observations of DG Tau's Radio Jet: A highly collimated thermal outflow
C. Lynch, R. L. Mutel, M. Güdel +4
The active young protostar DG Tau has an extended jet that has been well studied at radio, optical, and X-ray wavelengths. We report sensitive new VLA full-polarization observation…
On the origin of [Ne II] emission in young stars: mid-infrared and optical observations with the Very Large Telescope
C. Baldovin-Saavedra, M. Audard, A. Carmona +5
{Abridged version for ArXiv}. We provide direct constraints on the origin of the [Ne II] emission in 15 young stars using high-spatial and spectral resolution observations with VIS…
New X-ray Detections of WNL Stars
Stephen L. Skinner, Svetozar A. Zhekov, Manuel Guedel +2
Previous studies have demonstrated that putatively single nitrogen-type Wolf-Rayet stars (WN stars) without known companions are X-ray sources. However, almost all WN star X-ray de…