scholarly journals Young massive stars and their environment in the mid-infrared at high angular resolution

2008 ◽  
Vol 131 ◽  
pp. 012022
Author(s):  
W J de Wit ◽  
M G Hoare ◽  
R D Oudmaijer ◽  
T Fujiyoshi
Keyword(s):  
Angular Resolution ◽  
Massive Stars ◽  
High Angular Resolution ◽  
Mid Infrared

scholarly journals The complex evolutionary paths of local infrared bright galaxies: a high-angular resolution mid-infrared view

2016 ◽  
Vol 463 (3) ◽  
pp. 2405-2424 ◽  
Author(s):  
A. Alonso-Herrero ◽  
R. Poulton ◽  
P. F. Roche ◽  
A. Hernán-Caballero ◽  
I. Aretxaga ◽  
...  
Keyword(s):  
Angular Resolution ◽  
High Angular Resolution ◽  
Mid Infrared ◽  
Evolutionary Paths

scholarly journals Taking the Measure of Massive Stars and their Environments with the CHARA Array Long-baseline Interferometer

2016 ◽  
Vol 12 (S329) ◽  
pp. 156-160
Author(s):  
Douglas R. Gies
Keyword(s):  
Angular Resolution ◽  
Massive Stars ◽  
High Angular Resolution ◽  
State University ◽  
Luminous Blue Variables ◽  
University Center ◽  
Long Baseline ◽  
Multiple Stars ◽  
Mount Wilson Observatory ◽  
Georgia State University

AbstractMost massive stars are so distant that their angular diameters are too small for direct resolution. However, the observational situation is now much more favorable, thanks to new opportunities available with optical/IR long-baseline interferometry. The Georgia State University Center for High Angular Resolution Astronomy Array at Mount Wilson Observatory is a six-telescope instrument with a maximum baseline of 330 meters, which is capable of resolving stellar disks with diameters as small as 0.2 milliarcsec. The distant stars are no longer out of range, and many kinds of investigations are possible. Here we summarize a number of studies involving angular diameter measurements and effective temperature estimates for OB stars, binary and multiple stars (including the σ Orionis system), and outflows in Luminous Blue Variables. An enlarged visitors program will begin in 2017 that will open many opportunities for new programs in high angular resolution astronomy.

scholarly journals Infrared Long Baseline Interferometry

1989 ◽  
Vol 8 ◽  
pp. 563-564
Author(s):  
W.C. Danchi ◽  
M. Bester ◽  
P.R. McCullough ◽  
C.H. Townes
Keyword(s):  
Delay Line ◽  
Angular Resolution ◽  
Spectral Characteristics ◽  
High Angular Resolution ◽  
Mid Infrared ◽  
Long Baseline ◽  
Interference Fringes ◽  
Infrared Spectral ◽  
New Instruments ◽  
Hgcdte Photodiodes

During the last few years, two new instruments using long baseline interferometry have been constructed for high angular resolution astronomy in the mid-infrared spectral region (8-12 μxm). One called SOIRDETE-Synthese d’Overture en InfraRouge a DEux TElescopes-was built by J. Gay and his collaborators at CERGA. SOIRDETE has a fixed E-W 15 m baseline and two 1 m diameter telescopes of conventional design. This instrument obtains interference fringes by adjusting an optical-precision delay line in discrete steps to compensate for the geometrical delay of the projected baseline. The interference fringe from the source is detected using HgCdTe photodiodes. Because the instrumental delay has discrete steps a time-domain interferogram is created. This interferogram, upon Fourier transformation to the frequency domain, yields information about the spectral characteristics of the source. First fringes have recently been obtained with this instrument (Gay, 1988).

scholarly journals A High Angular Resolution Survey of Massive Stars in Cygnus OB2: JHK Adaptive Optics Results from the Gemini Near-Infrared Imager

2020 ◽  
Vol 160 (3) ◽  
pp. 115
Author(s):  
S. M. Caballero-Nieves ◽  
D. R. Gies ◽  
E. K. Baines ◽  
A. H. Bouchez ◽  
R. G. Dekany ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Near Infrared ◽  
Angular Resolution ◽  
Massive Stars ◽  
High Angular Resolution ◽  
Infrared Imager

scholarly journals The sharpest view of the local AGN population at mid-infrared wavelengths

2013 ◽  
Vol 9 (S304) ◽  
pp. 225-226
Author(s):  
Daniel Asmus ◽  
Sebastian F. Hönig ◽  
Poshak Gandhi ◽  
Alain Smette ◽  
Wolfgang J. Duschl
Keyword(s):  
Active Galactic Nuclei ◽  
Angular Resolution ◽  
Spatial Scales ◽  
Galactic Nuclei ◽  
High Angular Resolution ◽  
Mid Infrared ◽  
X Ray ◽  
Infrared Wavelengths ◽  
Photometric Measurements

AbstractWe present the largest mid-infrared (MIR) atlas of active galactic nuclei at sub-arcsec spatial scales containing 253 objects with a median redshift of 0.016. It comprises all available ground-based high-angular resolution MIR observations performed to date with 8-meter class telescopes and includes 895 photometric measurements. All types of AGN are present in the atlas, which also includes 80 per cent of the 9-month BAT AGN sample. Therefore, this atlas and its subsamples are very well-suited for AGN unification studies. A first application of the atlas is the extension of the MIR–X-ray luminosity correlation for AGN.

High angular resolution broad-band imaging in the mid-infrared - The infrared bright galaxy NGC 34

1991 ◽  
Vol 374 ◽  
pp. L29 ◽  
Author(s):  
Eric Keto ◽  
Garrett Jernigan ◽  
John Arens ◽  
Margaret Meixner ◽  
Roger Ball
Keyword(s):  
Angular Resolution ◽  
Broad Band ◽  
High Angular Resolution ◽  
Bright Galaxy ◽  
Mid Infrared

scholarly journals Mid-infrared properties of nearby low-luminosity AGN at high angular resolution

2011 ◽  
Vol 536 ◽  
pp. A36 ◽  
Author(s):  
D. Asmus ◽  
P. Gandhi ◽  
A. Smette ◽  
S. F. Hönig ◽  
W. J. Duschl
Keyword(s):  
Angular Resolution ◽  
High Angular Resolution ◽  
Mid Infrared

scholarly journals THE HIGH ANGULAR RESOLUTION MULTIPLICITY OF MASSIVE STARS

2009 ◽  
Vol 137 (2) ◽  
pp. 3358-3377 ◽  
Author(s):  
Brian D. Mason ◽  
William I. Hartkopf ◽  
Douglas R. Gies ◽  
Todd J. Henry ◽  
John W. Helsel
Keyword(s):  
Angular Resolution ◽  
Massive Stars ◽  
High Angular Resolution

scholarly journals Interferometry of massive stars: the next step

2014 ◽  
Vol 9 (S307) ◽  
pp. 480-489
Author(s):  
Ph. Stee ◽  
A. Meilland ◽  
O. L. Creevey
Keyword(s):  
Differential Rotation ◽  
Angular Resolution ◽  
Massive Stars ◽  
High Angular Resolution ◽  
Third Generation ◽  
Optical Interferometer ◽  
Large Telescope ◽  
Very Large Telescope ◽  
Beam Combiner ◽  
Radial Pulsations

AbstractWe present some new and interesting results on the complementarity between asteroseismology and interferometry, the detection of non-radial pulsations in massive stars and the possibility for evidencing differential rotation on the surface of Bn stars. We also discuss the curretn interferometric facilities, namely the Very Large Telescope Interferometer (VLTI)/AMBER, VLTI/MIDI, VLTI/PIONIER within the European Southern Observatory (ESO) context and the Center for High Angular Resolution Astronomy (CHARA) array with their current limitations. The forthcoming second-generation VLTI instruments GRAVITY and MATISSE are presented as well as the FRIEND prototype in the visible spectral domain and an update of the Navy Precision Optical Interferometer (NPOI). A conclusion is presented with a special emphasis on the foreseen difficulties for a third generation of interferometric instruments within the (budget limited) Extremely Large Telescope framework and the need for strong science cases to push a future visible beam combiner.

scholarly journals High-angular resolution observations of the Pistol star

2010 ◽  
Vol 6 (S272) ◽  
pp. 616-617
Author(s):  
Christophe Martayan ◽  
Ronny Blomme ◽  
Jean-Baptiste Le Bouquin ◽  
Anthony Merand ◽  
Guillaume Montagnier ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Angular Resolution ◽  
Massive Stars ◽  
High Angular Resolution ◽  
Near Ir ◽  
First Results ◽  
Formation And Evolution ◽  
Luminous Blue Variable

AbstractFirst results of near-IR adaptive optics (AO)-assisted imaging, interferometry, and spectroscopy of this Luminous Blue Variable (LBV) are presented. They suggest that the Pistol Star is at least double. If the association is physical, it would reinforce questions concerning the importance of multiplicity for the formation and evolution of extremely massive stars.

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