194 citations · 743 across the 19 of their papers we have counts for
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X-Shooter spectroscopy of young stellar objects - VI - HI line decrements
S. Antoniucci, B. Nisini, T. Giannini +4
Hydrogen recombination emission lines commonly observed in accreting young stellar objects represent a powerful tracer for the gas conditions in the circumstellar structures. Here…
X-ray variability of cool stars: Magnetic activity and accretion
B. Stelzer
This article provides a review of X-ray variability from late-type stars with particular focus on the achievements of XMM-Newton and its potential for future studies in this field.
The Multiple Young Stellar Objects of HBC 515: An X-ray and Millimeter-wave Imaging Study in (Pre-main Sequence) Diversity
D. A. Principe, G. G. Sacco, J. H. Kastner +3
We present Chandra X-ray Observatory and Submillimeter Array (SMA) imaging of HBC 515, a system consisting of multiple young stellar objects (YSOs). The five members of HBC 515 rep…
A path towards understanding the rotation-activity relation of M dwarfs with K2 mission, X-ray and UV data
B. Stelzer, M. Damasso, A. Scholz +2
We study the relation between stellar rotation and magnetic activity for a sample of 134 bright, nearby M dwarfs observed in the Kepler Two-Wheel (K2) mission during campaigns C0 t…
Spectroscopic signatures of magnetospheric accretion in Herbig Ae/Be stars. I. The case of HD101412
M. Schöller, M. A. Pogodin, J. A. Cahuasqui +10
Models of magnetically-driven accretion and outflows reproduce many observational properties of T Tauri stars. This concept is not well established for the more massive Herbig Ae/B…
First X-ray dectection of the young variable V1180 Cas
S. Antoniucci, A. A. Nucita, T. Giannini +8
V1180 Cas is a young variable that has shown strong photometric fluctuations (Delta_I~6mag) in the recent past, which have been attributed to events of enhanced accretion. The sour…
Variability of young stellar objects: accretion, disks, outflows and magnetic activity
B. Stelzer
This article represents a short review of the variability characteristics of young stellar objects. Variability is a key property of young stars. Two major origins may be distingui…
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~\Ms…
Magnetic fields of Herbig Ae/Be stars
S. Hubrig, I. Ilyin, M. Schoeller +5
We report on the status of our spectropolarimetric studies of Herbig Ae/Be stars carried out during the last years. The magnetic field geometries of these stars, investigated with…
X-Shooter spectroscopy of young stellar objects III. Photospheric and chromospheric properties of Class III objects
B. Stelzer, A. Frasca, J. M. Alcala +7
We analyzed X-Shooter/VLT spectra of 24 ClassIII sources from three nearby star-forming regions (sigmaOrionis, LupusIII, and TWHya). We determined the effective temperature, surfac…
The UV and X-ray activity of the M dwarfs within 10pc of the Sun
B. Stelzer, A. Marino, G. Micela +2
We systematically study the X-ray and ultraviolet emission of a subsample of M dwarfs from a recent proper-motion survey, selecting all M dwarfs within 10pc to obtain a nearly volu…
Measuring the mass accretion rates of Herbig Ae/Be stars with X-shooter
M. A. Pogodin, S. Hubrig, R. V. Yudin +3
We present the results of our observations of eight magnetic Herbig Ae/Be stars obtained with the X-shooter spectrograph mounted on UT2 at the VLT. X-shooter provides a simultaneou…
The ultracool dwarf DENIS-P J104814.7-395606. Chromospheres and coronae at the low-mass end of the main-sequence
B. Stelzer, J. Alcala, K. Biazzo +8
We have obtained an XMM-Newton observation and a broad-band spectrum from the ultraviolet to the near infrared with X-Shooter for one of the nearest M9 dwarfs, DENIS-P J1048-3956 (…
X-ray view of IC348 in the light of an updated cluster census
B. Stelzer, T. Preibisch, F. Alexander +4
We study the properties of the coronae of the low-mass stars in the young (~2-3Myr), nearby (~310pc) open cluster IC348 combining X-ray and optical/infrared data. The four existing…
Characterising the magnetic fields of the Herbig Ae/Be stars HD97048, HD150193, HD176386, and MWC480
S. Hubrig, M. Schoeller, I. Ilyin +6
Our knowledge of the presence and the role of magnetic fields in intermediate-mass pre-main-sequence stars remains very poor. We present the magnetic properties of four Herbig Ae/B…
Search of X-ray emission from roAp stars: The case of gamma Equulei
B. Stelzer, C. A. Hummel, M. Schöller +2
The detection of X-ray emission from Ap stars can be an indicator for the presence of magnetic activity and dynamo action, provided different origins for the emission, such as wind…
Searching for a link between the magnetic nature and other observed properties of Herbig Ae/Be stars and stars with debris disks
S. Hubrig, B. Stelzer, M. Schoeller +6
Among the 21 Herbig Ae/Be stars studied, new detections of a magnetic field were achieved in six stars. For three Herbig Ae/Be stars, we confirm previous magnetic field detections.…
Searching for a link between the magnetic nature and other observed properties of Herbig Ae/Be stars
S. Hubrig, C. Grady, M. Schoeller +5
We present the results of a new magnetic field survey of Herbig Ae/Be and A debris disk stars. They are used to determine whether magnetic field properties in these stars are corre…