Fe Kαline emission from the Arches cluster region – evidence for ongoing particle bombardment?
نویسندگان
چکیده
منابع مشابه
Nonthermal Emission from the Arches Cluster (g0.121+0.017) and the Origin of Γ-ray Emission from 3eg J1746-2851
High resolution VLA observations of the Arches cluster near the Galactic center show evidence of continuum emission at λ3.6, 6, 20 and 90cm. The continuum emission at λ90cm is particularly striking because thermal sources generally become optically thick at longer wavelengths and fall off in brightness whereas non-thermal sources increase in brightness. It is argued that the radio emission from...
متن کاملDetection of X-Ray Emission from the Arches Cluster near the Galactic Center
The Arches cluster is an extraordinarily compact massive star cluster with a core radius of about 1000 ( 0.4 pc) and consisting of more than 150 O star candidates with initial stellar masses greater than 20 M near G0.12-0.02. X-ray observations of the radio Arc near the Galactic center at l 0=2, which contains the Arches cluster, have been carried out with the Advanced CCD Imaging Spectrometer ...
متن کاملElectron Emission from Inconel under Ion Bombardment
Electron yields from clean and oxydized Inconel 625 surfaces have been measured for H', H:, Hef, 0' and Ar+ ions at normal incidence in the energy range 1.5-40 keV. These measurements have been made under ultrahigh vacuum and the samples were freed of surface contaminants by bombarding with high doses of either 20 keV H l or 30 keV Ar+ ions. Differences in yields of oxydized versus clean surfac...
متن کاملThe Arches Cluster Mass Function
We have analyzed H and Ks–band images of the Arches cluster obtained using the NIRC2 instrument on Keck with the laser guide star adaptive optics (LGS AO) system. With the help of the LGS AO system, we were able to obtain the deepest ever photometry for this cluster and its neighborhood, and derive the background-subtracted present-day mass function (PDMF) down to 1.3M⊙ for the 5–9 annulus of t...
متن کاملGold-thiolate cluster emission from SAMs under keV ion bombardment: Experiments and molecular dynamics simulations
In this contribution the emission of gold-molecule cluster ions from self-assembled monolayers (SAMs) of alkanethiols on gold is investigated using time-of-flight secondary ion mass spectrometry (ToF-SIMS). Layers of alkanethiols [CH3(CH2)nSH] with various chain lengths (n 1⁄4 8, 12, 16) have been chosen because they form well-ordered molecular monolayers on gold. First, we compare and interpre...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2011
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201116574