منابع مشابه
CI and CO in the nearby spiral galaxies IC 342 and Maffei 2
We present J=2–1, J=3–2, J=4–3 CO and 492 GHz [CI] maps as well as J=2–1 and J=3–2 CO measurements of the central regions in the nearby Sc galaxies IC 342 and Maffei 2. In both galaxies. the distribution of CO and [CI] is strongly concentrated towards the center. These centers harbour modest starbursts. Both galaxies have nearly identical CO transitional ratios but the relative intensities of t...
متن کاملWater maser emission in IC 342
The detection of 22GHz water vapor emission from IC 342 is reported, raising the detection rate among northern galaxies with IRAS point source fluxes S100μm > 50 Jy to 16%. The maser, associated with a star forming region ∼10–15 west of the nucleus, consists of a single 0.5 kms wide feature and reaches an isotropic luminosity of 10 L⊙ (D=1.8Mpc). If the time variability is intrinsic, the maser ...
متن کاملMolecular Gas and Star Formation in the Nucleus of IC 342: CO and Millimeter Continuum Imaging
We present high resolution maps (∼ 2′′) maps of the J=1-0 and J=2-1 transitions of CO in the central ∼ 150 pc of the gas-rich nucleus of IC 342, made with the Owens Valley Millimeter Array. From the CO maps we are able to obtain the most accurate map of NH2 to date for IC 342. Due to their low opacities, the transitions of CO give a more reliable estimate of the true molecular gas column densit...
متن کاملCo-bandhead Spectroscopy of Ic 342: Mass and Age of the Nuclear Star Cluster
We have used the NASA Infra-Red Telescope Facility (IRTF) to observe the nuclear stellar cluster in the nearby, face-on, giant Scd spiral IC 342. From high resolution (λ/∆λ = 21500) spectra at the 12CO (2-0) bandhead at 2.3μm we derive a line-of-sight stellar velocity dispersion σ = (33 ± 3) km s−1. To interpret this observation we construct dynamical models based on the Jeans equation for a sp...
متن کاملDense gas in nearby galaxies XV . Hot ammonia in NGC 253 , Maffei 2 and IC 342
The detection of NH3 inversion lines up to the (J,K) = (6, 6) level is reported toward the central regions of the nearby galaxies NGC253, Maffei 2, and IC 342. The observed lines are up to 406K (for (J,K) = (6, 6)) and 848K (for the (9, 9) transition) above the ground state and reveal a warm (Tkin = 100 . . . 140K) molecular component toward all galaxies studied. The tentatively detected (J,K) ...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1994
ISSN: 0252-9211
DOI: 10.1017/s0252921100019837