scholarly journals TESTING THE HYPOTHESIS THAT METHANOL MASER RINGS TRACE CIRCUMSTELLAR DISKS: HIGH-RESOLUTION NEAR-INFRARED AND MID-INFRARED IMAGING

2012 ◽  
Vol 754 (2) ◽  
pp. 149 ◽  
Author(s):  
James M. De Buizer ◽  
Anna Bartkiewicz ◽  
Marian Szymczak
Keyword(s):  
High Resolution ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Circumstellar Disks ◽  
Mid Infrared ◽  
Methanol Maser

scholarly journals Adaptive Optics Imaging of Circumstellar Environments

2004 ◽  
Vol 221 ◽  
pp. 307-312
Author(s):  
Dániel Apai ◽  
Ilaria Pascucci ◽  
Hongchi Wang ◽  
Wolfgang Brandner ◽  
Thomas Henning ◽  
...  
Keyword(s):  
High Resolution ◽  
Adaptive Optics ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Circumstellar Disks ◽  
Circumstellar Envelope ◽  
High Contrast ◽  
Contrast Imaging ◽  
High Contrast Imaging ◽  
Circumstellar Environments

We present results from our high-resolution, high-contrast imaging campaign targeting the circumstellar environments of young, nearby stars of different masses. The observations have been conducted using the ALFA/CA 3.5m and NACO UT4/VLT adaptive optics systems. In order to enhance the contrast we applied the methods PSF-subtraction and polarimetric differential imaging (PDI). The observations of young stars yielded the identification of numerous new companion candidates, the most interesting one being ∼ 0.5″ from FU Ori. We also obtained high-resolution near-infrared imaging of the circumstellar envelope of SU Aur and AB Aur. Our PDI of the TW Hya circumstellar disk traced back the disk emission as close as 0.1″ ≃ 6 AU from the star, the closest yet. Our results demonstrate the potential of the adaptive optics systems in achieving high-resolution and high-contrast imaging and thus in the study of circumstellar disks, envelopes and companions.

HIGH-RESOLUTION MID-INFRARED IMAGING OF THE CIRCUMSTELLAR DISKS OF HERBIG Ae/Be STARS

2011 ◽  
Vol 737 (2) ◽  
pp. 57 ◽  
Author(s):  
N. Mariñas ◽  
C. M. Telesco ◽  
R. S. Fisher ◽  
C. Packham
Keyword(s):  
High Resolution ◽  
Infrared Imaging ◽  
Circumstellar Disks ◽  
Be Stars ◽  
Mid Infrared

scholarly journals 3.3. Circumnuclear regions of active and non-active barred galaxies

1998 ◽  
Vol 184 ◽  
pp. 93-94
Author(s):  
J.H. Knapen
Keyword(s):  
High Resolution ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Seyfert Galaxy ◽  
Active Galaxies ◽  
Necessary Condition ◽  
Nuclear Activity ◽  
Barred Galaxies ◽  
Galaxy Cores

I discuss the role of galactic bars in the fuelling of (circum)nuclear activity. Since the majority of all galaxies are barred, the presence of a bar in a Seyfert galaxy cannot be the sole reason for their activity, although it appears to be a necessary condition for activity. Two options for further work are being explored, high-resolution near-infrared imaging of samples of active and non-active galaxies, and detailed case studies of selected galaxy cores.

High-resolution mid-infrared imaging and astrometry of the nucleus of the Seyfert galaxy NGC 1068

1993 ◽  
Vol 409 ◽  
pp. L5 ◽  
Author(s):  
J. A. Braatz ◽  
A. S. Wilson ◽  
D. Y. Gezari ◽  
F. Varosi ◽  
C. A. Beichman
Keyword(s):  
High Resolution ◽  
Infrared Imaging ◽  
Seyfert Galaxy ◽  
Mid Infrared ◽  
Ngc 1068

The true nucleus of NGC 253 revealed by high-resolution near-infrared imaging

1994 ◽  
Vol 430 ◽  
pp. L33 ◽  
Author(s):  
Bruce J., III Sams ◽  
R. Genzel ◽  
A. Eckart ◽  
L. Tacconi-Garman ◽  
R. Hofmann
Keyword(s):  
High Resolution ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Near Infrared Imaging

scholarly journals HIGH-RESOLUTION NEAR-INFRARED IMAGING OF SUBMILLIMETER GALAXIES

2013 ◽  
Vol 768 (2) ◽  
pp. 164 ◽  
Author(s):  
Paula Aguirre ◽  
Andrew J. Baker ◽  
Felipe Menanteau ◽  
Dieter Lutz ◽  
Linda J. Tacconi
Keyword(s):  
High Resolution ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Near Infrared Imaging ◽  
Submillimeter Galaxies

scholarly journals High-Resolution Mid-Infrared Imaging of Radio Ultracompact HiiRegions

2007 ◽  
Vol 133 (2) ◽  
pp. 639-655 ◽  
Author(s):  
U. Giveon ◽  
M. J. Richter ◽  
R. H. Becker ◽  
R. L. White
Keyword(s):  
High Resolution ◽  
Infrared Imaging ◽  
Mid Infrared

scholarly journals The Morphologies of Massive Galaxies at 1

2012 ◽  
Vol 8 (S295) ◽  
pp. 49-52
Author(s):  
V. A. Bruce ◽  
J. S. Dunlop ◽  
M. Cirasuolo ◽  
R. J. McLure ◽  
T. A. Targett ◽  
...  
Keyword(s):  
Star Formation ◽  
High Resolution ◽  
Near Infrared ◽  
Infrared Imaging ◽  
Significant Fraction ◽  
Morphological Transformation ◽  
Massive Galaxies ◽  
Physical Mechanisms ◽  
Star Formation Activity ◽  
Simply Connected

AbstractWe have used high-resolution, HST WFC3/IR, near-infrared imaging to conduct a detailed bulge-disk decomposition of the morphologies of ≃ 200 of the most massive (M* > 1011 M⊙) galaxies at 1 < z < 3 in the CANDELS-UDS field. We find that, while such massive galaxies at low redshift are generally bulge-dominated, at redshifts 1<z<2 they are predominantly mixed bulge+disk systems, and by z > 2 they are mostly disk-dominated. Interestingly, we find that while most of the quiescent galaxies are bulge-dominated, a significant fraction (25–40%) of the most quiescent galaxies, have disk-dominated morphologies. Thus, our results suggest that the physical mechanisms which quench star-formation activity are not simply connected to those responsible for the morphological transformation of massive galaxies.

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