4406 : a radio - infrared comparison
نویسنده
چکیده
IC 4406 is a large (about 100×30) southern bipolar planetary nebula, composed by two elongated lobes, extending from a bright central region, where there is evidence for the presence of a large torus of gas and dust. In this poster we show new observations of this source performed with IRAC (Spitzer Space Telescope) and the Australia Telescope Compact Array. Although the possibility for faint extended emission to be missing in the radio maps cannot be ruled out, flux from the ionized gas appears to be concentrated in the bright central region. Comparing ATCA to IRAC images, it seems that, like in other planetary nebulae, ionized and neutral components spatially coexist in IC 4406.
منابع مشابه
ar X iv : 0 71 0 . 21 35 v 1 [ as tr o - ph ] 1 0 O ct 2 00 7 IC 4406 : a radio - infrared view
IC 4406 is a large (about 100 × 30) southern bipolar planetary nebula, composed of two elongated lobes extending from a bright central region, where there is evidence for the presence of a large torus of gas and dust. We show new observations of this source performed with IRAC (Spitzer Space Telescope) and the Australia Telescope Compact Array. The radio maps show that the flux from the ionized...
متن کاملar X iv : 0 71 0 . 21 35 v 2 [ as tr o - ph ] 1 5 A pr 2 00 8 IC 4406 : a radio - infrared view
IC 4406 is a large (about 100 × 30) southern bipolar planetary nebula, composed of two elongated lobes extending from a bright central region, where there is evidence for the presence of a large torus of gas and dust. We show new observations of this source performed with IRAC (Spitzer Space Telescope) and the Australia Telescope Compact Array. The radio maps show that the flux from the ionized...
متن کاملIdentification of the 4406 Regulatory Region, a Developmental Promoter of Myxococcus xanthus, and a DNA Segment Responsible for Chromosomal Position-Dependent Inhibition of Gene Expression
When starved, Myxococcus xanthus cells send signals to each other that coordinate their movements, gene expression, and differentiation. C-signaling requires cell-cell contact, and increasing contact brought about by cell alignment in aggregates is thought to increase C-signaling, which induces expression of many genes, causing rod-shaped cells to differentiate into spherical spores. C-signalin...
متن کاملUltraviolet–to–far-infrared Properties of Local Star-forming Galaxies
We present the results of a multiwavelength study of nearby galaxies aimed at understanding the relation between the ultraviolet and far-infrared emission in star-forming galaxies. The data set comprises new ultraviolet (from HST STIS), ground-based H , and radio continuum observations, together with archival infrared data (from IRAS and ISO). The local galaxies are used as benchmarks for compa...
متن کاملThe Likelihood Ratio as a tool for Radio Continuum Surveys with SKA precursor telescopes
In this paper we investigate the performance of the likelihood ratio method as a tool for identifying optical and infrared counterparts to proposed radio continuum surveys with SKA precursor and pathfinder telescopes. We present a comparison of the infrared counterparts identified by the likelihood ratio in the VISTA Deep Extragalactic Observations (VIDEO) survey to radio observations with 6, 1...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006