194 citations · 743 across the 19 of their papers we have counts for
19 papers
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…
Magnetic fields in Herbig Ae stars
S. Hubrig, M. Schoeller, R. V. Yudin
Herbig Ae stars are young A-type stars in the pre-main sequence evolutionary phase with masses of ~1.5-3 M_o. They show rather intense surface activity (Dunkin et al. 1997) and inf…