| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 38m 49.93s[1] |
| Declination | -49° 48′ 01.2″[1] |
| Apparent magnitude (V) | 14.0[1] |
| Characteristics | |
| Spectral type | DAV4.4[2] |
| Variable type | DAV (ZZ Ceti)[2] |
| Astrometry | |
| Radial velocity (Rv) | −12[2] km/s |
| Parallax (π) | 61.0 ± 9.4[3] mas |
| Distance | approx. 53 ly (approx. 16 pc) |
| Details | |
| Mass | 1.10[4] M☉ |
| Luminosity | 0.001[3] L☉ |
| Surface gravity (log g) | 8.81 ± 0.05[5] |
| Temperature | 11730 ± 350[5] K |
| Other designations | |
|
V886 Cen, BPM 37093, GJ 2095, LFT 931, LHS 2594, LTT 4816, WD 1236-495[1]
|
|
V886 Centauri (BPM 37093) is a variable white dwarf star of the DAV, or ZZ Ceti, type, with a hydrogen atmosphere and an unusually high mass of approximately 1.1 times the Sun's. It is about 50 light-years from Earth, in the constellation Centaurus, and vibrates; these pulsations cause its luminosity to vary.[1][4] Like other white dwarfs, V886 Centauri is thought to be composed primarily of carbon and oxygen, which are created by thermonuclear fusion of helium nuclei in the triple-alpha process.[6]
In the 1960s, it was predicted that as a white dwarf cools, its material should crystallize, starting at the center.[7] When a star pulsates, observing its pulsations gives information about its structure. V886 Centauri was first observed to be a pulsating variable in 1992,[8] and in 1995 it was pointed out that this yielded a potential test of the crystallization theory.[9] In 2004, Antonio Kanaan and a team of researchers of the Whole Earth Telescope estimated, on the basis of these asteroseismological observations, that approximately 90% of the mass of V886 Centauri had crystallized.[4][7][10][11] Other work gives a crystallized mass fraction of between 32% and 82%.[5] Any of these estimates would result in a total crystalline mass in excess of 5×1029 kilograms.
Crystallization of the material of a white dwarf of this type is thought to result in a body-centered cubic lattice of carbon and/or oxygen nuclei, which are surrounded by a Fermi sea of electrons.[12]
Contents |
In Popular Culture [link]
- Since a diamond also consists of crystallized carbon, the star V886 Centauri has been nicknamed Lucy after The Beatles's hit Lucy in the Sky with Diamonds.[10]
- The star is mentioned as trivia in the Modern Marvels episode "Carbon", and is said to be 10 billion trillion trillion carats. [13]
See also [link]
- List of star extremes
- WASP-12b, a "diamond planet"
- PSR J1719-1438 b, the crystalline remnant of an evaporated white dwarf
References [link]
- ^ a b c d e V886 Centauri, query result in SIMBAD. Accessed on line April 1, 2008.
- ^ a b c A Catalog of Spectroscopically Identified White Dwarfs, George P. McCook and Edward M. Sion, Astrophysical Journal Supplement 121, #1 (March 1999), pp. 1–130. CDS ID III/210.
- ^ a b Photometric and Spectroscopic Analysis of Cool White Dwarfs with Trigonometric Parallax Measurements, P. Bergeron, S. K. Leggett, María Teresa Ruiz, Astrophysical Journal Supplement 133, #2 (April 2001), pp. 413–449. Bibcode: 2001ApJS..133..413B
- ^ a b c Whole Earth Telescope observations of BPM 37093: a seismological test of crystallization theory in white dwarfs, A. Kanaan, A. Nitta, D. E. Winget, S. O. Kepler, M. H. Montgomery, T. S. Metcalfe, et al., Astronomy and Astrophysics 432, #1 (March 2005), pp. 219–224. Bibcode: 2005A&A...432..219K doi:10.1051/0004-6361:20041125.
- ^ a b c P. Brassard, G. Fontaine, Asteroseismology of the Crystallized ZZ Ceti Star BPM 37093: A Different View, Astrophysical Journal 622, #1, pp. 572–576. Bibcode: 2005ApJ...622..572B
- ^ Late stages of evolution for low-mass stars, Michael Richmond, lecture notes, Physics 230, Rochester Institute of Technology, accessed online May 3, 2007.
- ^ a b Testing White Dwarf Crystallization Theory with Asteroseismology of the Massive Pulsating DA Star BPM 37093, T. S. Metcalfe, M. H. Montgomery, and A. Kanaan, Astrophysical Journal 605, #2 (April 2004), pp. L133–L136. Bibcode: 2004ApJ...605L.133M
- ^ The discovery of a new DAV star using IUE temperature determination, A. Kanaan, S. O. Kepler, O. Giovannini, and M. Diaz, Astrophysical Journal Letters 390, #2 (May 10, 1992), pp. L89–L91. Bibcode: 1992ApJ...390L..89K
- ^ The Status of White Dwarf Asteroseismology and a Glimpse of the Road Ahead, D. E. Winget, Baltic Astronomy 4 (1995), pp. 129–136. Bibcode: 1995BaltA...4..129W
- ^ a b BBC News: Diamond star thrills astronomers
- ^ Press release, 2004, Harvard-Smithsonian Center for Astrophysics.
- ^ Crystallization of carbon-oxygen mixtures in white dwarfs, J. L. Barrat, J. P. Hansen, and R. Mochkovitch, Astronomy and Astrophysics 199, #1–2 (June 1988), pp. L15–L18. Bibcode: 1988A&A...199L..15B
- ^ https://www.tv.com/shows/modern-marvels/carbon-1162869/
External links [link]
- BPM 37093 (Diamond Star)
- Largest diamond in galaxy predicts future of solar system, Pravda.ru, December 26, 2007.
https://wn.com/V886_Centauri
Esox
Esox is a genus of freshwater fish, the only living genus in the family Esocidae—the esocids which were endemic to North America and Eurasia during the Paleogene through present.
The species of this genus are known as pike and pickerel. The type species is E. lucius, the northern pike.
The big pike species are native to the Palearctic and Nearctic ecozones, ranging across northern North America and from Western Europe to Siberia in Eurasia.
Pikes have the elongated, torpedo-like form of predatory fishes, with sharply pointed heads and sharp teeth. Their coloration is typically grey-green with a mottled or spotted appearance with stripes along their backs, providing camouflage among weeds. Individual pike marking patterns are unique, like fingerprints. Pike can grow to a maximum recorded length of 1.83 m (6 ft), reaching a maximum recorded weight of 35 kg (77 lb).
Species
There currently seven recognized species in this genus:
Lucy (2014 film)
Lucy is a 2014 English-language French science fiction action film written and directed by Luc Besson and produced by his wife Virginie Silla for his company Europacorp. The film was shot in Taipei, Paris and New York City. It stars Scarlett Johansson, Morgan Freeman, Amr Waked and Choi Min-sik. Johansson portrays the title character, a woman who gains psychokinetic abilities when a nootropic drug is absorbed into her bloodstream.
The film was released on July 25, 2014, and became a box office success, grossing over $463 million against a budget of $40 million. It received mainly positive, but also polarized, critical reviews, with praise for Johansson's performance, entertaining or intriguing themes and visuals, and criticism for having a nonsensical plot, especially its focus on the ten percent of the brain myth and resulting abilities.
Plot
Lucy is a 24-year-old American woman living and studying in Taipei, Taiwan. She is tricked into working as a drug mule by her new boyfriend, whose employer, Mr. Jang, is a Korean mob boss and drug lord. Lucy delivers a briefcase to Mr. Jang containing a highly valuable synthetic drug called CPH4. After seeing her boyfriend shot and killed, she is captured. A bag of the drug is forcibly sewn into her abdomen and that of three other drug mules who will also transport the drug for sale in Europe. While Lucy is in captivity, one of her captors kicks her in the abdomen, breaking the bag and releasing a large quantity of the drug into her system. As a result, she begins acquiring increasingly enhanced physical and mental capabilities, such as telepathy, telekinesis, mental time travel, and the ability not to feel pain or other discomforts. She kills off her captors and escapes.
Ina, Kapatid, Anak
Ina, Kapatid, Anak (Lit: Mother, Sibling, Child / English: Her Mother's Daughter) is a 2012 Philippine family drama television series directed by Don M. Cuaresma and Jojo A. Saguin, starring Kim Chiu and Maja Salvador, together with an ensemble cast. The series was aired on ABS-CBN and worldwide on The Filipino Channel from October 8, 2012 to June 14, 2013, replacing Lorenzo's Time. The show is now airing in Tanzania on Star TV and Kenya on KTN in Africa.
The drama follows the lives of Celyn (Kim Chiu), Margaux (Maja Salvador), Liam (Xian Lim), and Ethan (Enchong Dee) and their struggles for power, acceptance, family and love.
The show was extended due to success in viewership ratings. The second season aired on January 14, 2013 with the episode featuring the grand revelation of Celyn being the daughter of Julio and Beatriz, while the third and final season aired on March 7, 2013 with the series opened a new chapter with a time skip focusing on the characters' young-adult stage and business rivalry.
Reddit (/ˈrɛdɪt/) is an entertainment, social news networking service, and news website where registered community members can submit content, such as text posts or direct links, making it essentially an online bulletin board system. Registered users can then vote submissions up or down to organize the posts and determine their position on the site's pages. Content entries are organized by areas of interest called "subreddits". The subreddit topics include news, gaming, movies, music, books, fitness, food, and photosharing, among many others. As of 2015, the website had 542 million monthly visitors (234 million unique users), ranking 14th most visited web-site in US and 36th in the world. Across 2015, Reddit saw 82.54 billion pageviews, 73.15 million submissions, 725.85 million comments, and 6.89 billion upvotes from its users.
Reddit was founded by University of Virginia roommates Steve Huffman and Alexis Ohanian in 2005. Condé Nast Publications acquired the site in October 2006. Reddit became a direct subsidiary of Condé Nast's parent company, Advance Publications, in September 2011. As of August 2012, Reddit operates as an independent entity, although Advance is still its largest shareholder. Reddit is based in San Francisco, California. In October 2014 Reddit raised $50 million in a funding round led by Sam Altman and including investors Marc Andreessen, Peter Thiel, Ron Conway, Snoop Dogg and Jared Leto. Their investment saw the company valued at $500 million.
Karma (Alicia Keys song)
"Karma" is a song by American singer and songwriter Alicia Keys, taken from her second studio album, The Diary of Alicia Keys (2003). Written by Keys, Kerry Brothers, Jr., and Taneisha Smith, the track takes influence from hip hop and classical music, and was released as the album's fourth and final single in November 2004, peaking at number twenty on the U.S. Billboard Hot 100 and number seventeen on the U.S. Billboard Hot R&B/Hip-Hop Songs chart—the album's only single not to top a Billboard chart. A mashup of "Karma" with Stevie Wonder's 1972 hit "Superstition" titled "Karmastition", produced by Go Home Productions, exists. "Karma" became The Diary of Alicia Keys's first release to fail to achieve top ten status on the Billboard Hot 100 and Hot R&B/Hip-Hop, peaking at number 20 and 17, respectively.
Content
In the song, the narrator's lover who had left her returns and wants to start a new relationship, but she has moved on. Her lover is now in the position she was once in, and in being rejected receives their just deserts ("what goes around comes around"). The title references the popular conception of karma as getting what one deserves.
