scholarly journals Spitzer Observations of M33 & M83 and the Hot Star, Hii Region Connection

2006 ◽  
Vol 2 (S235) ◽  
pp. 328-328
Author(s):  
R. Rubin ◽  
J. Simpson ◽  
S. Colgan ◽  
R. Dufour ◽  
R. Citron ◽  
...  
Keyword(s):  
Emission Line ◽  
Stellar Atmosphere ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Spitzer Space Telescope ◽  
Space Telescope ◽  
Hii Region

AbstractEmission-line observations made with the Spitzer Space Telescope are used to test the predicted ionizing spectral energy distributions of various stellar atmosphere models.

scholarly journals Optical–Radio Connections AGN Illumination or Jet/cloud Interactions?

1996 ◽  
Vol 175 ◽  
pp. 217-222
Author(s):  
Clive N. Tadhunter
Keyword(s):  
Emission Line ◽  
Optical Emission ◽  
Radio Galaxies ◽  
Spectral Energy ◽  
Radio Sources ◽  
Early Type ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Extragalactic Radio Sources ◽  
Radio Power

Many of the most important discoveries in the study of extragalactic radio sources have resulted from investigations of the relationships between optical and radio properties. The optical/radio connections include: correlations between optical emission line luminosity and radio power; alignments between optical/UV and radio structures; and UV excesses in the spectral energy distributions of radio galaxies compared with normal early-type galaxies.

scholarly journals Spitzer finds cosmic neon's and sulfur's sweet spot: part III, NGC 6822

2009 ◽  
Vol 5 (S265) ◽  
pp. 249-250
Author(s):  
R. H. Rubin ◽  
I. A. McNabb ◽  
J. P. Simpson ◽  
R. J. Dufour ◽  
A. W. A. Pauldrach ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Spectral Energy Distribution ◽  
Stellar Atmosphere ◽  
Abundance Ratio ◽  
Spectral Energy ◽  
Sweet Spot ◽  
Irregular Galaxy ◽  
Spitzer Space Telescope ◽  
Space Telescope ◽  
Ngc 6822

AbstractWe observed several H ii regions in the dwarf irregular galaxy NGC 6822 using the infrared spectrograph on the Spitzer Space Telescope. Our aim is twofold: first, to examine the neon to sulfur abundance ratio in order to determine how much it may vary and whether or not, it is fairly ‘universal’; second, to discriminate and test the predicted ionizing spectral energy distribution between various stellar atmosphere models by comparing with our derivation of the ratio of fractional ionizations involving neon and sulfur. This work extends our previous similar studies of H ii regions in M83 and M33 to lower metallicities.

scholarly journals Investigating the Source of Planck-Detected AME: High-Resolution Observations at 15 GHz

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Yvette C. Perrott ◽  
Anna M. M. Scaife ◽  
Natasha Hurley-Walker ◽  
Keith J. B. Grainge
Keyword(s):  
High Resolution ◽  
Frequency Band ◽  
Regions Of Interest ◽  
Microwave Emission ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Ancillary Data ◽  
Energy Distributions ◽  
Hii Region ◽  
Small Array

ThePlanck28.5 GHz maps were searched for potential Anomalous Microwave Emission (AME) regions on the scale of~3° or smaller, and several new regions of interest were selected. Ancillary data at both lower and higher frequencies were used to construct spectral energy distributions (SEDs), which seem to confirm an excess consistent with spinning dust models. Here we present higher resolution observations of two of these new regions with the Arcminute Microkelvin Imager Small Array (AMI SA) between 14 and 18 GHz to test for the presence of a compact (~10 arcmin or smaller) component. For AME-G107.1+5.2, dominated by the Hii region S140, we find evidence for the characteristic rising spectrum associated with either the spinning dust mechanism for AME or an ultra- /hypercompact Hii region across the AMI frequency band; however, for AME-G173.6+208 we find no evidence for AME on scales of~2–10 arcmin.

scholarly journals Erratum: ProSpect: generating spectral energy distributions with complex star formation and metallicity histories

2020 ◽  
Vol 500 (3) ◽  
pp. 2859-2860
Author(s):  
A S G Robotham ◽  
S Bellstedt ◽  
C del P Lagos ◽  
J E Thorne ◽  
L J Davies ◽  
...  
Keyword(s):  
Star Formation ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions
Sign in / Sign up

Export Citation Format

Share Document