| 词条 | David Malin |
| 释义 |
| name = David Malin | honorific-suffix = {{post-nominals|country=AUS|size=100|AM}} | image = David Malin looking at poster.jpeg | alt = | caption = David Malin looking at a poster about Malin 1, a galaxy found by him | birth_name = | birth_date = {{Birth date and age|df=yes|1941|03|28}} | birth_place = Bury, Lancashire, England | death_date = | death_place = | nationality = British | citizenship = Australian | other_names = | occupation = Astronomer | years_active = | known_for = | notable_works = }} David Frederick Malin {{post-nominals|country=AUS|AM}} (born 28 March 1941) is a British-Australian astronomer and photographer. He is principally known for his spectacular colour images of astronomical objects. A galaxy is named after him, Malin 1, which he discovered in 1986 and which is the largest spiral galaxy so far discovered. CareerMalin was born in 1941 and raised in Heywood, Greater Manchester, in the north of England. He was trained as a chemist and originally worked as a microscopist. In 1975 he moved to Sydney to take up a job with the Anglo-Australian Observatory (AAO), now the Australian Astronomical Observatory. Whilst working at the AAO, Malin developed several photographic processing techniques to maximise the ability to extract faint and low contrast detail from the non-linear response and high densities of photographic plates. These techniques were initially devised to enhance the scientific return from photography, but Malin is now best known for the series of three-colour wide field images of deep space objects which have been widely published as posters and in books around the world. Most professional astronomical photographs are monochromatic; if colour pictures are required, three images are needed. During his career at the AAO, Malin made about 150 three-colour images of deep sky objects, mostly using plates taken with the {{convert|4|m|in|adj=on}} Anglo-Australian Telescope and the {{convert|1.2|m|in|adj=on}} UK Schmidt Telescope. The true-colour images are assembled from three separate monochromatic photographs taken through red, green and blue filters. Each photographic plate is a special black and white emulsion designed for low light conditions and is further enhanced for low light sensitivity by baking in a nitrogen and hydrogen atmosphere. The exposure times are relatively long, varying between 5–60 minutes for each colour, depending on the luminosity of the object. The colour image is re-assembled in the darkroom, where further techniques such as unsharp masking to enhance fine detail might also be applied. In 1986 he discovered Malin 1, a giant spiral galaxy located {{convert|366|Mpc|e9ly|lk=on|order=flip}} away in the constellation Coma Berenices, near the North Galactic Pole.[1] {{As of|2015|02}} it is the largest spiral galaxy so far discovered, with an approximate diameter of {{convert|650000|ly|pc}}.[2][3][4] Since the early 1990s, silver-based astrophotography has been largely superseded by CCD imaging techniques. Although CCDs are much more sensitive than photographic plates, they are rarely able to cover the large field of view required to capture most nebulae and nearer galaxies. Malin has published over 250 academic papers on the Astrophysics Data System (ADS)[5] and ten books.[6] In 2001 he retired from the AAO to concentrate on his own business, David Malin Images, which manages his image collection along with those of related photographers. Awards
Selected publications
References1. ^{{cite journal |title=The Ghostliest Galaxies |journal=Scientific American |first=G. D. |last=Bothun |volume=276 |issue=2 |pages=40–45 |date=February 1997 |bibcode=1997SciAm.276b..40B}} 2. ^{{cite web |url=http://kencroswell.com/Malin1.html |title=Malin 1: A Bizarre Galaxy Gets Slightly Less So |work=KenCroswell.com |first=Ken |last=Crosswell |date=22 January 2007}} 3. ^{{cite news |url=https://www.forbes.com/sites/brucedorminey/2013/12/22/astronomers-still-puzzle-over-low-surface-brightness-galaxies/ |title=Astronomers Still Puzzle Over 'Low Surface Brightness' Galaxies |work=Forbes |first=Bruce |last=Dorminey |date=22 December 2013 |accessdate=30 December 2014}} 4. ^{{cite book |url=https://books.google.com/books?id=GJ-Lts1QgrkC&pg=PA3&lpg=PA3 |title=Guinness World Records 2011 |publisher=Random House |location=New York |editor-first=Craig |editor-last=Glenday |page=3 |date=2011 |isbn=978-0-440-42310-2}} 5. ^{{cite web|title=SAO/NASA ADS Abstract Service|url=http://adsabs.harvard.edu/cgi-bin/nph-basic_connect|website=adsabs.harvard.edu|publisher=Astrophysics Data System |accessdate=13 October 2016|location=Search for "Malin D.F."}} 6. ^{{cite web|title=Google Books search for author "David Malin"|url=https://www.google.com/search?tbm=bks&q=inauthor:"David+Malin"|website=www.google.com|accessdate=13 October 2016}} 7. ^{{cite web|title=Chrétien International Research Grants|url=https://aas.org/grants-and-prizes/chr%C3%A9tien-international-research-grants|website=aas.org|publisher=American Astronomical Society|accessdate=13 October 2016}} 8. ^{{cite web|title=Previous Recipients of the Progress Award|url=https://psa-photo.org/index.php?awards/progress-medal/previous-recipients/|website=psa-photo.org|publisher=Photographic Society of America|accessdate=13 October 2016}} 9. ^{{cite web| last1=Fava| first1=Stella| title=Commonwealth Medal: For Advancement of Photographic Technology - Honour Roll| url=http://www.a-p-s.org.au/index.php/members/honours/honour-roll-by-award/549-commonwealth-medal-for-advancement-of-photographic-technology| website=www.a-p-s.org.au| publisher=Australian Photographic Society |accessdate=13 October 2016}} 10. ^{{cite web|title=Past Winners & Finalists (Eureka Prizes)|url=http://australianmuseum.net.au/eureka-past|website=australianmuseum.net.au|publisher=Australian Museum|accessdate=13 October 2016}} 11. ^{{cite web|title=Recipients Archives|url=http://www.lennartnilssonaward.se/category/recipients/|website=www.lennartnilssonaward.se|publisher=Lennart Nilsson Award Foundation|accessdate=1 October 2016}} 12. ^{{cite web|title=Honorary Degree Recipients|url=http://www1.rmit.edu.au/browse/Staff%2FWorkplace%20essentials%2FStrategy,%20planning%20and%20governance%2FStrategy%20and%20Governance%2FUniversity%20Secretariat%2FInformation%20and%20Services%2FHonorary%20Titles%2FHonorary%20Degree%20Recipients/|publisher=RMIT University|accessdate=13 October 2016|deadurl=yes|archiveurl=https://web.archive.org/web/20160816153659/http://www1.rmit.edu.au/browse/Staff%2FWorkplace%20essentials%2FStrategy,%20planning%20and%20governance%2FStrategy%20and%20Governance%2FUniversity%20Secretariat%2FInformation%20and%20Services%2FHonorary%20Titles%2FHonorary%20Degree%20Recipients/|archivedate=16 August 2016|df=dmy-all}} 13. ^{{cite web|title=David Malin: Doctor of applied science honoris causa|url=http://www.graduation.rmit.edu.au/citations/davidmalin.doc|publisher=RMIT University|format=Word|accessdate=13 October 2016}} 14. ^{{cite web|title=AIC Hubble Award|url=http://www.aicccd.com/awards/aic_hubble_award.html|website=www.aicccd.com|publisher=Advanced Imaging Conference|accessdate=13 October 2016}} External links
8 : 1941 births|Living people|Australian astronomers|20th-century astronomers|British astronomers|Australian inventors|Members of the Order of Australia|English emigrants to Australia |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。