| 词条 | V603 Aquilae |
| 释义 |
epoch=J2000 | ra=18h 48m 54.6366s | dec= +00° 35′ 02.863″ | appmag_v=11.64 | constell=Aquila }}{{Starbox character | class=sd:Be+ | r-i = | v-r = | b-v = -0.2 ± 0.5 | u-b = | variable=Variable star }}{{Starbox astrometry | radial_v = −23 | prop_mo_ra = 10.81 | prop_mo_dec = −8.86 | parallax = | p_error = | dist_ly = {{convert|249|pc|ly|disp=output number only}}{{±|{{convert|9|pc|ly|disp=output number only}}|{{convert|8|pc|ly|disp=output number only}}}} | dist_pc = {{val|249|9|8}} | absmag_v = 11.65 }}{{Starbox catalog | names=Nova Aql 1918, Nova Aquilae 1918, EM* CDS 1028, HD 174107, 1RXS J184854.7+003501, ALS 9992, 1ES 1846+00.5, SBC7 706, AN 7.1918, FASTT 1189, HIP 92316, UBV M 51004, CSI+00-18463, GCRV 68659, KPD 1846+0031, 2E 1846.3+0031, LS IV +00 3, 2E 4138, GSC 00448-00423, 2MASS J18485464+0035030, EM* RJHA 116, HBHA 202-05, PLX 4341, AAVSO 1843+00. }}{{Starbox reference | | ARICNS = }}{{Starbox end}}V603 Aquilae (or Nova Aquilae 1918) was a bright nova occurring in the constellation Aquila in 1918. It is a binary system, comprising a white dwarf and donor low-mass star in close orbit to the point of being only semidetached. The white dwarf sucks matter off its companion, which has filled its Roche lobe,[1] onto its accretion disk and surface until the excess material is blown off in a thermonuclear event.[3] This material then forms an expanding shell, which eventually thins out and disappears.[1] First seen by Zygmunt Laskowski, a medical professor and amateur astronomer,[2] and then confirmed on the night of 8 June 1918 by the UK amateur astronomer Grace Cook,[3] Nova Aquilae reached a peak magnitude of −0.5; it was the brightest nova recorded in the era of the telescope.[4] It was brighter than all stars but Sirius and Canopus.[5] Tycho's and Kepler's supernovae were brighter, but both occurred before the invention of the telescope.[6] Originally a star system with a magnitude of 11.43, it took twelve days to fade three magnitudes and then 18.6 years to fade to quiescence.[4] In 1964 Robert P. Kraft ascertained that it was a binary system, recently{{When|date=October 2015}} determined to be true for several other novae at the time.[7] The star system has settled to an average apparent magnitude of 11.4 since the 1940s, fading by around 1/100 of a magnitude per decade. Spectroscopic analysis conducted by Arenas and colleagues indicated the system consisted of a white dwarf of about 1.2 times as massive as the sun, with an accretion disk, and a companion star with about 20% of the Sun's mass.[12] This second star is most likely a red dwarf.[1] The two stars orbit each other approximately every 3 hours 20 minutes.[8] References1. ^1 2 {{cite journal|bibcode=1981ASSL...89..515S|author=Selvelli, P. L.|author2=Cassatella, A. |title=Nova AQL 1918 - A nude old nova |journal=In: Effects of Mass Loss on Stellar Evolution; Proceedings of the Fifty-ninth Colloquium, Trieste, Italy, September 15–19, 1980. (A82-33926 16-90) Dordrecht, D. Reidel Publishing Co.|volume=89|pages=515–522|date=1981|doi=10.1007/978-94-009-8500-1_74|series=Astrophysics and Space Science Library|isbn=978-94-009-8502-5}} 2. ^The Contribution of Amateurs to Astronomy, Proceedings of Colloquium 98 of the International Astronomical Union, June 20–24, 1987, page 41 3. ^{{cite book|last=Mobberley|first=Martin |title=Cataclysmic Cosmic Events and How to Observe Them|publisher=Springer|date=2009|pages=46|isbn=978-0387799469|url=https://books.google.com/?id=-WQCJOkVfsUC&pg=PA48&dq=Nova+Aquilae+1918#v=onepage&q=Nova%20Aquilae%201918&f=false}} 4. ^1 2 {{cite journal|author=Johnson, Christopher B.|author2=Schaefer, Bradley E.|author3=Kroll , Peter|author4=Henden, Arne A. |date=2013|title=Nova Aquilae 1918 (V603 Aql) Faded by 0.44 mag/century from 1938-2013| arxiv=1310.6802|bibcode = 2014ApJ...780L..25J |doi = 10.1088/2041-8205/780/2/L25|volume=780|issue=2|journal=The Astrophysical Journal|pages=L25}} 5. ^{{cite book|last=Moore|first=Patrick|title=The Amateur Astronomer|publisher=Springer|date=2006|pages=145|isbn=978-1846282867|url=https://books.google.com/?id=85RZ04fHe88C&pg=PA145&dq=Nova+Aquilae+1918#v=onepage&q=Nova%20Aquilae%201918&f=false}} 6. ^{{cite journal|author=Drechsel, H.|author2=Holm, A.|author3=Krautter, J.|author4=Rahe, J.|last-author-amp=yes|date=1981|title=Phase-dependent optical and ultraviolet observations of the old nova V603 Aquilae (1918)|journal=Astronomy & Astrophysics|volume=99|issue=1|pages=166–72|bibcode=1981A&A....99..166D}} 7. ^{{cite journal|last=Kraft|first=Robert P.|date=1964|title=Binary stars among cataclysmic variables. III. Ten old novae|journal=Astrophysical Journal|volume=139|pages= 457–75|doi=10.1086/147776|bibcode = 1964ApJ...139..457K }} 8. ^1 {{cite journal|bibcode=2000MNRAS.311..135A |title=A spectroscopic study of V603 Aquilae: stellar parameters and continuum-line variations |author=Arenas, J. |author2=Catalán, M. S. |author3=Augusteijn, T. |author4=Retter, A.| journal = Monthly Notices of the Royal Astronomical Society| volume = 311|issue = 1|pages= 135–48 |doi=10.1046/j.1365-8711.2000.03061.x|year=2000 }} }}
External links
6 : Henry Draper Catalogue objects|Novae|Aquila (constellation)|Astronomical objects discovered in 1918|Objects with variable star designations|Hipparcos objects |
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