galaxies
Raban, D.
Citation
Raban, D. (2009, November 24). Infrared Interferometric observation of dust in the nuclei of active galaxies. Retrieved from https://hdl.handle.net/1887/14564
Version: Corrected Publisher’s Version
License: Licence agreement concerning inclusion of doctoral thesis in the Institutional Repository of the University of Leiden
Downloaded from: https://hdl.handle.net/1887/14564
Note: To cite this publication please use the final published version (if applicable).
1. The dynamical state and origin of the obscuring torus are still a mystery.
This thesis 2. The dust temperatures for AGN tori calculated from standard models are too high.
This thesis 3. The common conception that the torus axis and the jet are parallel is a myth.
This thesis 4. The question of what mechanisms maintain the stability of the torus in AGNs is of utmost impor-
tance. This question will not be answered with empirical data within the next ten years.
This thesis
5. The huge amount of information available to Astronomers hinders efficient research.
6. The gap between the general public’s fascination with Astronomy, and how little the general public actually knows about it should worry Astronomers.
7. Amateur Astronomers are often more knowledgeable about some aspect than professional Astro- nomers, and particularly compared to young professional Astronomers.
8. An Astronomer’s career would benefit from submitting pre-prints to Astro-ph so that they appear in the top of the mailing list.
9. The Israelis as a people fill all the criteria of a nation, and an Israeli national identity exists.
10. Military conscription is practically equivalent to slavery.
Leiden, November 2009 David Raban
Red Galaxies at High Redshift
1. Rode sterrenstelsels op hoge roodverschuiving vormen geen uniforme populatie.
Hoofdstuk 3 & 5 2. Sterrenstelsels met een rode kleur in het UV, optisch en nabije infrarood domineren de ge¨ıntegreerde
totale infrarood emissie op hoge roodverschuiving.
Hoofdstuk 3 3. Bij het bepalen van de massa van een sterrenstelsel op basis van fotometrie kan de opeenstapeling
van foute aannamen tot goede resultaten leiden.
Hoofdstuk 6 4. De hoeveelheid zware passieve en stervormende sterrenstelsels op hoge roodverschuiving is in overeenstemming met een theoretisch model dat een belangrijke rol toekent aan botsingen tussen sterrenstelsels die gepaard gaan met activiteit rond een superzwaar zwart gat. De waargenomen kleurverdeling van stervormende stelsels wijkt echter af van de door dit model voorspelde verde- ling.
Hoofdstuk 7 5. Niet de fouten op de individuele fotometrische meetpunten, maar het beperkt aantal meetpunten vormt de grootste belemmering bij het karakteriseren van de sterpopulaties van sterrenstelsels in het vroege heelal op basis van diepe breedband waarnemingen.
6. Iedere waarnemer wordt gelimiteerd door het licht dat hij/zij ontvangt.
7. Als het waarneembaar heelal zo groot was als alle oceanen tezamen, dan zou de Orionnevel in
´e´en druppel uit die kosmische oceaan passen. Als de Orionnevel zo groot was als alle oceanen tezamen, dan speelden de maanreizen zich af binnen ´e´en druppel. Sinds de laatste maanreis in 1972 is het experimenteel onderzoeksgebied van de astronaut een miljoen maal kleiner geworden.
8. Na de mens is de indigovink het best gedocumenteerde voorbeeld van een diersoort die tijdens haar aardse levensloop gebruik maakt van hemellichamen buiten ons zonnestelsel.
zie bijvoorbeeld Emlen, S. T. 1967, The AUK, 84:309-342 9. Vooralsnog lijkt intelligentie noch een noodzakelijk gevolg van evolutie, noch een garantie voor
succes in de struggle for life.
10. Veel reizen vergroot niet noodzakelijk je wereld.
11. Het wordt hoog tijd dat het wereldrecord op de honderd meter sprint in duizendsten van seconden wordt uitgedrukt.
12. “Whatever you do, don’t do it halfway.”
Bob Beamon
Leiden, september 2007 Stijn Wuyts
1. Red galaxies at high redshift do not form a uniform population.
Chapter 3 & 5 2. Galaxies with a red color in the UV, optical, and near-infrared dominate the integrated total infra-
red emission at high redshift.
Chapter 3 3. In determining the mass of a galaxy on the basis of photometry, a combination of wrong assump-
tions can lead to good results.
Chapter 6 4. The abundance of massive quiescent and star-forming galaxies at high redshift is consistent with a model in which galaxy collisions involving quasar activity play a key role. The observed color distribution of star-forming galaxies, however, deviates from the model prediction.
Chapter 7 5. It is not the errors on individual photometric data points, but the limited number of data points that poses the largest obstacle in characterizing stellar populations of galaxies in the early universe by means of deep broad-band photometry.
6. Every observer is limited by the light he/she receives.
7. If the observable universe were as big as all oceans combined, then the Orion Nebula would oc- cupy one drop of that cosmic ocean. And if the Orion Nebula were as big as all oceans combined, then the journeys to the moon would be confined to a single drop. Since the last journey to the moon in 1972, the astronaut’s fieldwork has been restricted to a volume that is a million times smaller.
8. After man, the indigo bunting is the best documented example of a species that in its earthly life uses celestial bodies outside the solar system.
see, e.g., Emlen, S. T. 1967, The AUK, 84:309-342 9. So far, intelligence seems to be neither a necessary consequence of evolution, nor a guarantee of
success in the struggle for life.
10. Traveling extensively does not necessarily enlarge your world.
11. It is about time that the world record in the hundred meter sprint were expressed in thousandths of a second.
12. “Whatever you do, don’t do it halfway.”
Bob Beamon
Leiden, September 2007 Stijn Wuyts
Red Galaxies at High Redshift
1. Red galaxies at high redshift do not form a uniform population.
Chapter 3 & 5 2. Galaxies with a red color in the UV, optical, and near-infrared dominate the integrated total infra-
red emission at high redshift.
Chapter 3 3. In determining the mass of a galaxy on the basis of photometry, a combination of wrong assump-
tions can lead to good results.
Chapter 6 4. The abundance of massive quiescent and star-forming galaxies at high redshift is consistent with a model in which galaxy collisions involving quasar activity play a key role. The observed color distribution of star-forming galaxies, however, deviates from the model prediction.
Chapter 7 5. It is not the errors on individual photometric data points, but the limited number of data points that poses the largest obstacle in characterizing stellar populations of galaxies in the early universe by means of deep broad-band photometry.
6. Every observer is limited by the light he/she receives.
7. If the observable universe were as big as all oceans combined, then the Orion Nebula would oc- cupy one drop of that cosmic ocean. And if the Orion Nebula were as big as all oceans combined, then the journeys to the moon would be confined to a single drop. Since the last journey to the moon in 1972, the astronaut’s fieldwork has been restricted to a volume that is a million times smaller.
8. After man, the indigo bunting is the best documented example of a species that in its earthly life uses celestial bodies outside the solar system.
see, e.g., Emlen, S. T. 1967, The AUK, 84:309-342 9. So far, intelligence seems to be neither a necessary consequence of evolution, nor a guarantee of
success in the struggle for life.
10. Traveling extensively does not necessarily enlarge your world.
11. It is about time that the world record in the hundred meter sprint were expressed in thousandths of a second.
12. “Whatever you do, don’t do it halfway.”
Bob Beamon
Leiden, September 2007 Stijn Wuyts
