Difference between revisions of "User talk:Marina"
| (11 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
==Welcome!== |
==Welcome!== |
||
| + | |||
| − | Hello, Marina!<br> |
||
| − | Welcome at TORI.<br> |
||
| − | I see, you already have successfully uploaded one file.<br> |
||
| − | Keep doing!<br> |
||
| − | You may ask your questions |
||
| − | here,<br> |
||
| − | at [[File talk:Lovelace-1.jpg]] <br> |
||
| − | at [[Talk:Richard Lovelace]] <br> |
||
| − | at [[User talk:T]]<br> |
||
| − | or at the "discussion" of any other page best related to your question.<br> |
||
Add four "tilde"s at the end; they become your signature. [[User:T|T]] ([[User talk:T|talk]]) 14:08, 21 December 2020 (JST) |
Add four "tilde"s at the end; they become your signature. [[User:T|T]] ([[User talk:T|talk]]) 14:08, 21 December 2020 (JST) |
||
[[User:T|T]] ([[User talk:T|talk]]) 14:08, 21 December 2020 (JST) |
[[User:T|T]] ([[User talk:T|talk]]) 14:08, 21 December 2020 (JST) |
||
| Line 16: | Line 7: | ||
== I am using this space for temporary files - modifications for wiki == |
== I am using this space for temporary files - modifications for wiki == |
||
| − | In 1968 (10 November), Lovelace and his collaborators discovered period <math>P\approx 33</math> ms of the [[Crab Pulsar]].<ref name=”Lovelace1968”>[https://ui.adsabs.harvard.edu/abs/1968IAUC.2113....1L/abstract “Pulsar NP 0532 Near Crab Nebula”] R. V. E. Lovelace, J. M. Sutton, and H. D. Craft 1968, November, IAU Circ., No. 2113, #1 (1968) </ref><ref name="Lovell1973">[https://ui.adsabs.harvard.edu/abs/1973ozjb.book.....L/abstract "Out of the Zenith. Jodrell Bank 1957-1970"] Sir. Bernard Lovell, 1973, London: Oxford University Press, pp 1-255 (see page159).</ref> As a graduate student working at [[Arecibo Observatory]], Lovelace developed a version of the [[Fast Fourier transform]] program <ref name="Lovelace1969">[https://ui.adsabs.harvard.edu/abs/1969Natur.222..231L/abstract "Digital Search Methods for Pulsars"] 1969, R. V. E. Lovelace, J. M. Sutton, E. E. Salpeter, ''Nature'' 222 (5190), 231-233.</ref> |
+ | In 1968 (10 November), Lovelace and his collaborators discovered period <math>P\approx 33</math> ms of the [[Crab Pulsar]].<ref name=”Lovelace1968”>[https://ui.adsabs.harvard.edu/abs/1968IAUC.2113....1L/abstract “Pulsar NP 0532 Near Crab Nebula”] R. V. E. Lovelace, J. M. Sutton, and H. D. Craft 1968, November, IAU Circ., No. 2113, #1 (1968) </ref><ref name="Lovell1973">[https://ui.adsabs.harvard.edu/abs/1973ozjb.book.....L/abstract "Out of the Zenith. Jodrell Bank 1957-1970"] Sir. Bernard Lovell, 1973, London: Oxford University Press, pp 1-255 (see page159).</ref> As a graduate student working at [[Arecibo Observatory]], Lovelace developed a version of the [[Fast Fourier transform]] program <ref name="Lovelace1969">[https://ui.adsabs.harvard.edu/abs/1969Natur.222..231L/abstract "Digital Search Methods for Pulsars"] 1969, R. V. E. Lovelace, J. M. Sutton, E. E. Salpeter, ''Nature'' 222 (5190), 231-233.</ref> |
| + | <ref name="Heideman1984">[https://www.cis.rit.edu/class/simg716/Gauss_History_FFT.pdf "Gauss and the history of the fast Fourier transform"] Heideman, Michael T., Johnson, Don H., Burrus, Charles Sidney (1984). (PDF). IEEE ASSP Magazine. 1 (4): 14–21. CiteSeerX 10.1.1.309.181. doi:10.1109/MASSP.1984.1162257. S2CID 10032502.</ref> which |
||
was adapted to run on the Arecibo Observatory's [[CDC 3000 series|CDC 3200]] computer |
was adapted to run on the Arecibo Observatory's [[CDC 3000 series|CDC 3200]] computer |
||
<ref name=”LovelaceTaylor2012”>[http://articles.adsabs.harvard.edu/pdf/2012Obs...132..186L "On the Discovery of the Period of the Crab Nebula Pulsar"] R.V.E. Lovelace & G. Leonard Tyler, 2012, The Observatory, V. 132, p. 186-188</ref>. This program helped to separate the periodic pulsar signal from the noise, and one night he discovered the period of the [[Crab pulsar]], which is approximately 33 ms. |
<ref name=”LovelaceTaylor2012”>[http://articles.adsabs.harvard.edu/pdf/2012Obs...132..186L "On the Discovery of the Period of the Crab Nebula Pulsar"] R.V.E. Lovelace & G. Leonard Tyler, 2012, The Observatory, V. 132, p. 186-188</ref>. This program helped to separate the periodic pulsar signal from the noise, and one night he discovered the period of the [[Crab pulsar]], which is approximately 33 ms. |
||
| − | <ref name = "Comella1969">[https://ui.adsabs.harvard.edu/abs/1969Natur.221..453C/abstract "Crab nebula pulsar NP 0532"] 1969, J. M. Comella, H. D. Craft, R. V. E. Lovelace, J. M. Sutton, G. L. Tyler, ''Nature'' 221 (5179), 453-454.</ref><ref name=”Lang2013”>[https://books.google.com/books?id=Nq_1CAAAQBAJ&newbks=1&newbks_redir=0&printsec=frontcover&pg=PA1&hl=en#v=onepage&q&f=false "Astrophysical Formulae. Space, Time, Matter and Cosmology"] Kenneth R. Lang 2014, Publisher: Springer Berlin Heidelberg</ref> A few weeks earlier, observers from the [[National Radio Astronomy Observatory]] reported |
+ | <ref name = "Comella1969">[https://ui.adsabs.harvard.edu/abs/1969Natur.221..453C/abstract "Crab nebula pulsar NP 0532"] 1969, J. M. Comella, H. D. Craft, R. V. E. Lovelace, J. M. Sutton, G. L. Tyler, ''Nature'' 221 (5179), 453-454.</ref><ref name=”Lang2013”>[https://books.google.com/books?id=Nq_1CAAAQBAJ&newbks=1&newbks_redir=0&printsec=frontcover&pg=PA1&hl=en#v=onepage&q&f=false "Astrophysical Formulae. Space, Time, Matter and Cosmology"] Kenneth R. Lang 2014, Publisher: Springer Berlin Heidelberg</ref> A few weeks earlier, observers from the [[National Radio Astronomy Observatory]] reported about two pulsating sources near the Crab Nebula, with no evident periodicities.<ref name="Howard1968">[https://ui.adsabs.harvard.edu/abs/1968IAUC.2110....2H/abstract "Pulsating radio sources near Crab Nebula"] Howard, W. E., Staelin, D. H., Reifenstein, E. C. 1968, IAU Circ., No. 2110, #2 (1968)</ref><ref name="Staelin1968">[https://ui.adsabs.harvard.edu/abs/1968Sci...162.1481S/abstract "Pulsating Radio Sources near the Crab Nebula"] Staelin, David H. and Reifenstein, Edward C., III, December 1968, Science, Volume 162, Issue 3861, pp. 1481-1483</ref>. Lovelace and collaborators found that one of pulsars (the NP 0532 - the Crab Pulsar) is located in the center of the Crab Nebula (with precision of 10') and found it's period with a high precision: 33.09 ms.<ref name = "Comella1969"/><ref name=”Lang2013”/> |
| − | were found near the Crab Nebula and could be coincident with it, and that both sources were sporadic, with no evident periodicities.<ref name="Howard1968">[https://ui.adsabs.harvard.edu/abs/1968IAUC.2110....2H/abstract "Pulsating radio sources near Crab Nebula"] Howard, W. E., Staelin, D. H., Reifenstein, E. C. 1968, IAU Circ., No. 2110, #2 (1968)</ref><ref name="Staelin1968">[https://ui.adsabs.harvard.edu/abs/1968Sci...162.1481S/abstract "Pulsating Radio Sources near the Crab Nebula"] Staelin, David H. and Reifenstein, Edward C., III, December 1968, Science, Volume 162, Issue 3861, pp. 1481-1483</ref>. On November 9 of 1968, Lovelace finished his computing program, and on the night from 9 to 10 of November he discovered that one of pulsars have a period of approximately 33 ms, which was the shortest period pulsar at that time.<ref name="Bondi1968"/>. Lovelace and collaborators found that only one pulsar is present in the Crab Nebula (the NP 0532 - the Crab Pulsar), and found its period with a high precision: 33.09 ms. They also found that the pulsar was located in the center of the Crab Nebula, with precision of 10'.<ref name = "Comella1969"/> |
||
| − | Lovelace proposed the [[Rossby waves]] instability in [[accretion disks]].<ref name="LovelaceEtAl1999">[https://ui.adsabs.harvard.edu/abs/1999ApJ...513..805L/abstract "Rossby wave instability of Keplerian accretion disks"] R. V. E. Lovelace, H. Li, S. A. Colgate, A. F. Nelson 1999, ''The Astrophysical Journal'' 513 (2), 805.</ref> These waves form anti-cyclonic [[vortex|vortices]] in accretion discs, where dust particles accumulate and may form planets.<ref name="VanDerMarel2013">[https://science.sciencemag.org/content/sci/340/6137/1199.full.pdf A Major Asymmetric Dust Trap in a Transition Disk] N. van der Marel, E. F. van Dishoeck, S. Bruderer, etc. 2013, Science Vol. 340, Issue 6137, pp. 1199-1202</ref><ref name=”Armitage2020”> [https://www.google.com/books/edition/Astrophysics_of_Planet_Formation/GIHCDwAAQBAJ?hl=en&gbpv=1&pg=PR11&printsec=frontcover Astrophysics of planet formation] P. J. Armitage, Cambridge University Press</ref> |
||
| − | |||
| − | |||
| − | <ref name = "Comella1969"/> |
||
==References== |
==References== |
||
<references/> |
<references/> |
||
Revision as of 14:51, 27 January 2021
Welcome!
Add four "tilde"s at the end; they become your signature. T (talk) 14:08, 21 December 2020 (JST) T (talk) 14:08, 21 December 2020 (JST)
I am using this space for temporary files - modifications for wiki
In 1968 (10 November), Lovelace and his collaborators discovered period \(P\approx 33\) ms of the Crab Pulsar.[1][2] As a graduate student working at Arecibo Observatory, Lovelace developed a version of the Fast Fourier transform program [3] [4] which was adapted to run on the Arecibo Observatory's CDC 3200 computer [5]. This program helped to separate the periodic pulsar signal from the noise, and one night he discovered the period of the Crab pulsar, which is approximately 33 ms. [6][7] A few weeks earlier, observers from the National Radio Astronomy Observatory reported about two pulsating sources near the Crab Nebula, with no evident periodicities.[8][9]. Lovelace and collaborators found that one of pulsars (the NP 0532 - the Crab Pulsar) is located in the center of the Crab Nebula (with precision of 10') and found it's period with a high precision: 33.09 ms.[6][7]
References
- ↑ “Pulsar NP 0532 Near Crab Nebula” R. V. E. Lovelace, J. M. Sutton, and H. D. Craft 1968, November, IAU Circ., No. 2113, #1 (1968)
- ↑ "Out of the Zenith. Jodrell Bank 1957-1970" Sir. Bernard Lovell, 1973, London: Oxford University Press, pp 1-255 (see page159).
- ↑ "Digital Search Methods for Pulsars" 1969, R. V. E. Lovelace, J. M. Sutton, E. E. Salpeter, Nature 222 (5190), 231-233.
- ↑ "Gauss and the history of the fast Fourier transform" Heideman, Michael T., Johnson, Don H., Burrus, Charles Sidney (1984). (PDF). IEEE ASSP Magazine. 1 (4): 14–21. CiteSeerX 10.1.1.309.181. doi:10.1109/MASSP.1984.1162257. S2CID 10032502.
- ↑ "On the Discovery of the Period of the Crab Nebula Pulsar" R.V.E. Lovelace & G. Leonard Tyler, 2012, The Observatory, V. 132, p. 186-188
- ↑ 6.0 6.1 "Crab nebula pulsar NP 0532" 1969, J. M. Comella, H. D. Craft, R. V. E. Lovelace, J. M. Sutton, G. L. Tyler, Nature 221 (5179), 453-454.
- ↑ 7.0 7.1 "Astrophysical Formulae. Space, Time, Matter and Cosmology" Kenneth R. Lang 2014, Publisher: Springer Berlin Heidelberg
- ↑ "Pulsating radio sources near Crab Nebula" Howard, W. E., Staelin, D. H., Reifenstein, E. C. 1968, IAU Circ., No. 2110, #2 (1968)
- ↑ "Pulsating Radio Sources near the Crab Nebula" Staelin, David H. and Reifenstein, Edward C., III, December 1968, Science, Volume 162, Issue 3861, pp. 1481-1483
