scholarly journals The Heterodyne Instrument for the Far Infrared – An Instrument for the Herschel Space Observatory

2009 ◽  
Author(s):  
Timothy Finn
Keyword(s):  
Far Infrared ◽  
Space Observatory ◽  
Herschel Space Observatory

scholarly journals Seeing the stolen starlight with Herschel

2009 ◽  
Vol 5 (S260) ◽  
Author(s):  
Haley L. Gomez ◽  
Edward L. Gomez ◽  
Peter Hargrave
Keyword(s):  
Public Interest ◽  
Far Infrared ◽  
Space Missions ◽  
Cosmic Dust ◽  
Space Observatory ◽  
Large Space ◽  
Herschel Space Observatory ◽  
Education And Outreach ◽  
The Uk ◽  
First Time

AbstractThe Herschel Space Observatory is ESA's fourth Cornerstone mission and will be the largest, most sensitive telescope ever put into space. It will be the first space observatory to observe from the far-infrared to the submillimetre waveband, unveiling the cool, hidden universe for the first time. Herschel will observe stars and galaxies at the stage of formation and discover where all the cosmic dust polluting galaxies comes from. Given the huge public interest in large space missions such as Hubble and Spitzer, Herschel is an ideal opportunity to excite and inform the UK public during the International Year of Astronomy 2009. Here we present some of the education and outreach projects created by the Herschel Outreach Group (HOG).

Cryogenic far-infrared laser absorptivity measurements of the Herschel Space Observatory telescope mirror coatings

2004 ◽  
Vol 43 (19) ◽  
pp. 3765 ◽  
Author(s):  
Jacqueline Fischer ◽  
Tjeerd Klaassen ◽  
Niels Hovenier ◽  
Gerd Jakob ◽  
Albrecht Poglitsch ◽  
...  
Keyword(s):  
Far Infrared ◽  
Infrared Laser ◽  
Space Observatory ◽  
Herschel Space Observatory ◽  
Far Infrared Laser

scholarly journals Eta carinae and the homunculus: far infrared/submillimetre spectral lines detected with the Herschel Space Observatory

2020 ◽  
Vol 499 (4) ◽  
pp. 5269-5301
Author(s):  
T R Gull ◽  
P W Morris ◽  
J H Black ◽  
K E Nielsen ◽  
M J Barlow ◽  
...  
Keyword(s):  
Binary Star ◽  
Far Infrared ◽  
Spectral Lines ◽  
Space Observatory ◽  
Herschel Space Observatory ◽  
Eta Carinae ◽  
Processed Material ◽  
Chemical Conditions ◽  
Physical And Chemical ◽  
Spectral Survey

ABSTRACT The evolved massive binary star η Carinae underwent eruptive mass-loss events that formed the complex bi-polar ‘Homunculus’ nebula harbouring tens of solar masses of unusually nitrogen-rich gas and dust. Despite expectations for the presence of a significant molecular component to the gas, detections have been observationally challenged by limited access to the far-infrared and the intense thermal continuum. A spectral survey of the atomic and rotational molecular transitions was carried out with the Herschel Space Observatory, revealing a rich spectrum of broad emission lines originating in the ejecta. Velocity profiles of selected PACS lines correlate well with known substructures: H i in the central core; NH and weak [C ii] within the Homunculus; and [N ii] emissions in fast-moving structures external to the Homunculus. We have identified transitions from [O i], H i, and 18 separate light C- and O-bearing molecules including CO, CH, CH+, and OH, and a wide set of N-bearing molecules: NH, NH+, N2H+, NH2, NH3, HCN, HNC, CN, and N2H+. Half of these are new detections unprecedented for any early-type massive star environment. A very low ratio [12C/13C] ≤ 4 is estimated from five molecules and their isotopologues. We demonstrate that non-LTE effects due to the strong continuum are significant. Abundance patterns are consistent with line formation in regions of carbon and oxygen depletions with nitrogen enhancements, reflecting an evolved state of the erupting star with efficient transport of CNO-processed material to the outer layers. The results offer many opportunities for further observational and theoretical investigations of the molecular chemistry under extreme physical and chemical conditions around massive stars in their final stages of evolution.

SPIRE beam steering mirror: a cryogenic 2 axis mechanism for the Herschel Space Observatory

2003 ◽  
Author(s):  
Ian Pain ◽  
Brian Stobie ◽  
Gillian S. Wright ◽  
T. A. Paul ◽  
Colin R. Cunningham
Keyword(s):  
Beam Steering ◽  
Space Observatory ◽  
Herschel Space Observatory

scholarly journals Far-infrared photometry of OJ 287 with the Herschel Space Observatory

2018 ◽  
Vol 610 ◽  
pp. A74
Author(s):  
Mark Kidger ◽  
Staszek Zola ◽  
Mauri Valtonen ◽  
Anne Lähteenmäki ◽  
Emilia Järvelä ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Light Curve ◽  
Spectral Index ◽  
Spectral Energy Distribution ◽  
Low Frequency ◽  
Far Infrared ◽  
Small Degree ◽  
Spectral Energy ◽  
Space Observatory ◽  
Near Ir

Context. The blazar OJ 287 has shown a ≈12 year quasi-periodicity over more than a century, in addition to the common properties of violent variability in all frequency ranges. It is the strongest known candidate to have a binary singularity in its central engine. Aim. We aim to better understand the different emission components by searching for correlated variability in the flux over four decades of frequency measurements. Methods. We combined data at frequencies from the millimetric to the visible to characterise the multifrequency light curve in April and May 2010. This includes the only photometric observations of OJ 287 made with the Herschel Space Observatory: five epochs of data obtained over 33 days at 250, 350, and 500 μm with Herschel-SPIRE. Results. Although we find that the variability at 37 GHz on timescales of a few weeks correlates with the visible to near-IR spectral energy distribution, there is a small degree of reddening in the continuum at lower flux levels that is revealed by the decreasing rate of decline in the light curve at lower frequencies. However, we see no clear evidence that a rapid flare detected in the light curve during our monitoring in the visible to near-IR light curve is seen either in the Herschel data or at 37 GHz, suggesting a low-frequency cut-off in the spectrum of such flares. Conclusions.We see only marginal evidence of variability in the observations with Herschel over a month, although this may be principally due to the poor sampling. The spectral energy distribution between 37 GHz and the visible can be characterised by two components of approximately constant spectral index: a visible to far-IR component of spectral index α = −0.95, and a far-IR to millimetric spectral index of α = −0.43. There is no evidence of an excess of emission that would be consistent with the 60 μmdust bump found in many active galactic nuclei.

scholarly journals Seyfert galaxies: a perspective with ISO-PHOT

1999 ◽  
Vol 193 ◽  
pp. 750-751
Author(s):  
Ana M. Pérez García ◽  
J.M. Rodríguez Espinosa
Keyword(s):  
Temperature Distribution ◽  
Far Infrared ◽  
Seyfert Galaxies ◽  
Inversion Method ◽  
Space Observatory ◽  
Infrared Space Observatory ◽  
Energy Distributions ◽  
Spectral Components ◽  
Ir Emission

We present mid and far-infrared energy distributions of the CfA Seyfert sample, obtained with the Infrared Space Observatory photometer (ISO-PHOT). To analyse the CfA Seyfert SEDS, we apply an inversion method: the Inverse Planckian Transform, assuming that the mid- and far-IR emission is thermal. We obtain the spectral temperature distribution of sources that reproduces the observed SEDS. We compare the parameters of the spectral components found showing that there are not differences between Seyfert 1 and Seyfert 2 as for their temperatures while the emission between 12 and 25 μm is anisotropic.

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