Browsing by Title
Now showing items 12258-12277 of 24473
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Ionization-induced star formation - III. Effects of external triggering on the initial mass function in clusters
(2012-05-01)We report on smoothed particle hydrodynamics simulations of the impact on a turbulent ∼2 × 103 M star-forming molecular cloud of irradiation by an external source of ionizing photons. We find that the ionizing radiation ... -
The ionized nebula surrounding the red supergiant W26 in westerlund 1
(2014-01)We present Hα images of an ionized nebula surrounding theM2-5Ia red supergiant (RSG)W26 in the massive star cluster Westerlund 1. The nebula consists of a circumstellar shell or ring ̃0.1 pc in diameter and a triangular ... -
An Ionized Outflow in Orion-KL Source I?
(2023-03-01)We present images at 6 and 14 GHz of Source I (SrcI) in the Kleinmann–Low Nebula in Orion. At higher frequencies, from 43 to 340 GHz, images of this source are dominated by thermal emission from dust in a 100 au diameter ... -
Ionizing feedback from massive stars in massive clusters - II. Disruption of bound clusters by photoionization
(2012-07-21)We present a smoothed particle hydrodynamics parameter study of the dynamical effect of photoionization from O-type stars on star-forming clouds of a range of masses and sizes during the time window before supernovae ... -
The ionizing properties of two bright Ly$α$ emitters in the BDF reionized bubble at z=7
(2022-06-28)We investigate the ionizing properties of the pair of bright Ly$\alpha$ emitting galaxies BDF521 and BDF2195 at z=7.012 in order to constrain their contribution to the formation of the BDF "reionized bubble". We obtain ... -
Ionophores : potential toxicities
(1996)The ionophores are a group of antibiotics produced by the fermentation of fungal [i]Streptomyces[/i] species which have activity against some Gram-positive bacteria, coccidia, [i]Neospora[/i] and [i]Toxoplasma[/i]. The ... -
Ionospheric modelling using GPS to calibrate the MWA. 1 : Comparison of first order ionospheric effects between GPS models and MWA observations
(2015-08-10)We compare first order (refractive) ionospheric effects seen by the Murchison Widefield Array (MWA) with the ionosphere as inferred from Global Positioning System (GPS) data. The first order ionosphere manifests itself as ... -
Ionospheric Modelling using GPS to Calibrate the MWA. II : Regional ionospheric modelling using GPS and GLONASS to estimate ionospheric gradients
(2016-07-13)We estimate spatial gradients in the ionosphere using the Global Positioning System (GPS) and GLONASS (Russian global navigation system) observations, utilising data from multiple GPS stations in the vicinity of Murchison ... -
AN IOT BASED WEATHER STATION USING AN EMBEDDED SYSTEM
(2022-12-22)This paper is about the development of an internet-based weather station system to monitor temperature, humidity, light intensity and predict the possibility of whether it will rain or not. The realtime monitoring system ... -
IP from the Standpoint of SQP
(2001) -
IP, an interesting phenomenon : The relevance of patents for the design-led start-up business
(2013-12-01)In their book, ‘The Smart Entrepreneur’, Clarysse and Kiefer claim that ‘Patents are particularly important when your business is not close to market, because the exclusivity afforded by a solid patent can buy you some ... -
IPHAS and the symbiotic stars. II. New discoveries and a sample of the most common mimics
(2010)Context. Knowledge of the total population of symbiotic stars in the Galaxy is important for understanding basic aspects of stellar evolution in interacting binaries and the relevance of this class of objects in the formation ... -
The IPHAS catalogue of Hα emission-line sources in the northern Galactic plane
(2008)We present a catalogue of point-source Hα emission-line objects selected from the INT/WFC Photometric Hα Survey (IPHAS) of the northern Galactic plane. -
IPHAS discoveries of young stars towards Cyg OB2 and its southern periphery
(2008)We report on the discovery of over 50 strong Hα emitting objects towards the large OB association Cyg OB2 and the H ii region DR 15 on its southern periphery. This was achieved using the INT Photometric Hα Survey of the ... -
IPHAS extinction distances to planetary nebulae
(2011)Aims. The determination of reliable distances to planetary nebulae (PNe) is a major difficulty in the study of this class of objects in the Galaxy. The availability of new photometric surveys such as IPHAS (the INT/WFC ... -
An IPHAS-based search for accreting very low-mass objects using VO tools
(2009)Context. The main goal of this paper is to prove that accreting very low-mass stars and brown dwarfs can be identified in IPHAS, an H emission survey of the northern Milky Way. Full exploitation of the IPHAS database and ... -
The IPHAS-POSS-I proper motion survey of the Galactic plane
(2009)We present a proper motion survey of the Galactic plane, using Isaac Newton Telescope (INT) Photometric Hα Survey (IPHAS) data and Palomar Sky Survey (POSS)-I Schmidt plate data as a first epoch, that probes down to proper ...