Infrared Observations of Magnetic Fields on Young Stars

2006 ◽  
pp. 325-330
Author(s):  
Jeff A. Valenti ◽  
Christopher M. Johns-Krull
Keyword(s):  
Magnetic Fields ◽  
Young Stars ◽  
Infrared Observations

scholarly journals X‐Ray and Infrared Observations of Embedded Young Stars in NGC 2264

2005 ◽  
Vol 618 (2) ◽  
pp. 795-809 ◽  
Author(s):  
Theodore Simon ◽  
S. E. Dahm
Keyword(s):  
Young Stars ◽  
Infrared Observations ◽  
X Ray

Fossil magnetic fields and activity of young stars

1991 ◽  
pp. 151-153
Author(s):  
A. E. Dudorov ◽  
E. E. Gorbenko
Keyword(s):  
Magnetic Fields ◽  
Young Stars

scholarly journals Solar System Size Proto-Stellar Sources Embedded in the ρ Oph Dark Cloud

1987 ◽  
Vol 115 ◽  
pp. 71-74
Author(s):  
H. Zinnecker ◽  
A. Chelli ◽  
C. Perrier
Keyword(s):  
Solar System ◽  
Spatial Structure ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
System Size ◽  
Young Stars ◽  
Dark Cloud ◽  
Infrared Observations ◽  
Stellar Sources

High spatial resolution infrared observations (mostly at L, some at K) of several young stars in the ρ Oph dark cloud were obtained with the specklegraph at the ESO 3.6m telescope in Chile in July 1985. Sources included EL29, EL21, EL14 and EL9 (Elias 1978, Table 2), and were all measured in two orthogonal directions, W-E (PA=90°) and N-S (PA=180°). Here we shall present visibility functions for EL29 and EL21 and indicate the spatial structure and dimension of these objects. We refer to Elias (1978, p.468/69) for earlier studies of EL29 and EL21.

scholarly journals Mid-infrared Observations of Magnetic Fields in the Disks of Bi-Polar Outflow Sources

1997 ◽  
Vol 163 ◽  
pp. 799-800
Author(s):  
Craig H. Smith ◽  
Christopher M. Wright ◽  
David K. Aitken ◽  
Patrick F. Roche
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Field Configuration ◽  
Field Direction ◽  
Magnetic Field Direction ◽  
Poloidal Field ◽  
Mid Infrared ◽  
Infrared Observations ◽  
Polarization Mechanism ◽  
The Magnetic Field

AbstractWe present the results from mid-infrared spectro-polarimetric observations of a number of bi-polar outflow sources. The specto-polarimetric data provides information on the polarization mechanism and the magnetic field direction. The field direction in the disks of the observed sources is most often normal to the ambient field direction and lies in the plane of the disk, indicating a toroidal rather than poloidal field configuration.

Milliarcsecond resolution infrared observations of young stars in Taurus and Ophiuchus

1987 ◽  
Vol 320 ◽  
pp. 344 ◽  
Author(s):  
M. Simon ◽  
R. R. Howell ◽  
A. J. Longmore ◽  
B. A. Wilking ◽  
D. M. Peterson ◽  
...  
Keyword(s):  
Young Stars ◽  
Infrared Observations

scholarly journals SPIRou: NIR velocimetry and spectropolarimetry at the CFHT

2020 ◽  
Vol 498 (4) ◽  
pp. 5684-5703 ◽  
Author(s):  
J-F Donati ◽  
D Kouach ◽  
C Moutou ◽  
R Doyon ◽  
X Delfosse ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Near Infrared ◽  
Planetary Systems ◽  
Young Stars ◽  
Central Position ◽  
M Dwarfs ◽  
Testing Phase ◽  
First Results ◽  
New Generation ◽  
Final Acceptance

ABSTRACT This paper presents an overview of SPIRou, the new-generation near-infrared spectropolarimeter/precision velocimeter recently installed on the 3.6-m Canada–France–Hawaii Telescope (CFHT). Starting from the two main science goals, i.e., the quest for planetary systems around nearby M dwarfs and the study of magnetized star/planet formation, we outline the instrument concept that was designed to efficiently address these forefront topics, and detail the in-lab and on-sky instrument performances measured throughout the intensive testing phase that SPIRou was submitted to before passing the final acceptance review in early 2019 and initiating science observations. With a central position among the newly started programmes, the SPIRou Legacy Survey (SLS) Large Programme was allocated 300 CFHT nights until at least mid 2022. We also briefly describe a few of the first results obtained in the various science topics that SPIRou started investigating, focusing in particular on planetary systems of nearby M dwarfs, transiting exoplanets and their atmospheres, magnetic fields of young stars, but also on alternate science goals like the atmospheres of M dwarfs and the Earth’s atmosphere. We finally conclude on the key role that SPIRou and the CFHT can play in coordination with forthcoming major facilities like the JWST, the ELTs, PLATO, and ARIEL over the decade.

scholarly journals Bright X‐Ray Flares in Orion Young Stars from COUP: Evidence for Star‐Disk Magnetic Fields?

2005 ◽  
Vol 160 (2) ◽  
pp. 469-502 ◽  
Author(s):  
F. Favata ◽  
E. Flaccomio ◽  
F. Reale ◽  
G. Micela ◽  
S. Sciortino ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Young Stars ◽  
X Ray

scholarly journals Dynamo and Fossil Magnetic Field in Young Stars

1993 ◽  
Vol 157 ◽  
pp. 171-175
Author(s):  
A.E. Dudorov
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Main Sequence ◽  
Young Stars ◽  
Small Scale ◽  
Scaling Relations ◽  
Main Sequence Stars ◽  
Nonlinear Stabilization ◽  
Turbulent Dynamo ◽  
Solar Type

The theory of fossil magnetic fields shows that new born stars may have internal magnetic fields of more than 1 million gauss. Convection inside young solar type stars will tangle any strong fossil magnetic field. The small scale magnetic field rises to the surface and determines the young stars activity attenuating with their age. When a fossil field is diminished a turbulent dynamo may begin to work in the condition of nonlinear stabilization. The scaling relations for the turbulent αω dynamo show that the strength of the generated “fossil” magnetic field inside the main sequence stars is stabilized on the level one tenth — 10 millions gauss, depending on the mass of the stars.

scholarly journals Luminosity function, star density, and star formation efficiency in regions of star formation - near infrared observations -

1991 ◽  
Vol 147 ◽  
pp. 289-292
Author(s):  
Klaus-Werner Hodapp ◽  
John Rayner ◽  
Hua Chen
Keyword(s):  
Star Formation ◽  
Luminosity Function ◽  
Near Infrared ◽  
Hii Regions ◽  
Young Stars ◽  
Young Age ◽  
Infrared Observations ◽  
Star Density ◽  
Many Sources ◽  
Formation Efficiency

Clusters of young stars have been found near a number of compact HII regions. These clusters do not show a turnover in the K-band luminosity and are probably several million years old. In L 1641 only moderate clustering tendency has been observed and many sources show signs of extremely young age.

scholarly journals Discovering young stars in the Gum 31 region with infrared observations

2013 ◽  
Vol 552 ◽  
pp. A14 ◽  
Author(s):  
H. Ohlendorf ◽  
T. Preibisch ◽  
B. Gaczkowski ◽  
T. Ratzka ◽  
J. Ngoumou ◽  
...  
Keyword(s):  
Young Stars ◽  
Infrared Observations
Sign in / Sign up

Export Citation Format

Share Document