منابع مشابه
50 μ as resolution VLBI images of AGN ’ s at λ 3 mm
We present 15 images from the global mmVLBI sessions in 1990 April at 100 GHz and 1993 April at 86 GHz. These observations probe the central engines of the 16 observed AGN’s with up to 50 μas resolution. Among other sources previously observed with λ3 mm VLBI we present the first λ3 mm maps of 0735+178, 0748+126, 1055+018, 2145+067, and CTA 102, in total we have been able to image 13 out of the...
متن کامل7 Mm Λ Vlba Observations of Sagittarius A*
We present 7 mm λ VLBA observations of the compact nonthermal radio source in the Galactic Center, Sgr A*. These observations confirm the hypothesis that the image of Sgr A* is a resolved elliptical Gaussian caused by the scattering of an intervening thermal plasma. The measured major axis of Sgr A* is 0.76 ± 0.04 mas, consistent with the predicted scattering size of 0.67 ± 0.03. We find an axi...
متن کاملSub - mm and near - IR observations of galaxies selected at 170 μ
We present results from JCMT sub-mm observations of sources selected from the ISO FIRBACK (Far-IR BACKground) survey, along with UKIRT near-IR imaging of a sub-sample. This gives valuable insight into the brightest ∼10% of galaxies which contribute to the Cosmic Infrared Background (CIB). We estimate the photometric redshifts and luminosities of these sources by fitting their Spectral Energy Di...
متن کاملHigh - resolution observations at λ = 3 mm of the OH 231 . 8 + 4 . 2 molecular outflow
We present high spatial resolution observations of HCO+ (J=1–0), SO (J=22–11), H13CN (J=1–0), SiO (v = 1, J = 2–1), and the continuum at 3 mm from OH 231.8+4.2, taken with the IRAM interferometer at Plateau de Bure. We also report the first detection of NS in circumstellar envelopes. The overall distribution of the emission of all molecules (except for HCO+ and the SiO maser) is similar to that...
متن کاملQuadrotor Control Using Fractional-Order PI^λ D^μ Control
Quadrotor control has been noted for its trouble as the consequence of the high maneuverability, system nonlinearity and strongly coupled multivariable. This paper deals with the simulation depend on proposed controller of a quadrotor that can overcome this trouble. The mathematical model of quadrotor is determined using a Newton-Euler formulation. Fractional Order Proportional Integral Derivat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 1964
ISSN: 0004-6256
DOI: 10.1086/109427