Meta tags:

Headings (most frequently used words):

survey, 6df, galaxy, contents, description, baryon, acoustic, oscillation, detection, the, peculiar, velocity, references, external, links,

Text of the page (most frequently used words):
the (84), #survey (49), 6df (20), galaxy (19), redshift (16), universe (16), and (15), galaxies (12), sky (10), edit (10), with (9), this (8), velocity (8), peculiar (8), wikipedia (7), are (7), 6dfgs (6), infrared (6), background (6), page (5), from (5), surveys (5), sdss (5), field (5), cosmic (5), 2009 (5), contents (4), search (4), view (4), commons (4), astronomical (4), description (4), mass (4), dark (4), 2dfgrs (4), big (4), history (4), distance (4), links (4), for (4), main (4), hide (4), move (4), sidebar (4), about (3), available (3), using (3), was (3), wikidata (3), sloan (3), digital (3), energy (3), 2df (3), all (3), structure (3), formation (3), expansion (3), hubble (3), cosmological (3), bang (3), online (3), possible (3), which (3), than (3), baryon (3), acoustic (3), oscillation (3), target (3), near (3), through (3), optical (3), new (3), observatory (3), degree (3), tools (3), languages (2), toggle (2), table (2), contact (2), privacy (2), policy (2), terms (2), wikimedia (2), march (2), categories (2), articles (2), short (2), observational (2), astronomy (2), stars (2), deep (2), deep2 (2), legacy (2), area (2), spectroscopic (2), 2mass (2), portal (2), cosmology (2), large (2), components (2), future (2), law (2), microwave (2), timeline (2), theories (2), principle (2), ladder (2), database (2), external (2), 1987 (2), beutler (2), 2011 (2), 2001 (2), references (2), not (2), distribution (2), measuring (2), velocities (2), type (2), more (2), can (2), between (2), plane (2), one (2), made (2), mpc (2), detection (2), means (2), local (2), selection (2), dominated (2), their (2), stellar (2), bulk (2), have (2), selected (2), its (2), schmidt (2), telescope (2), instrument (2), per (2), redshifts (2), spectra (2), related (2), appearance (2), upload (2), file (2), changes (2), read (2), article (2), log (2), create (2), account (2), donate (2), menu (2), add, topic, mobile, cookie, statement, statistics, developers, code, conduct, legal, safety, contacts, disclaimers, text, under, additional, may, apply, site, you, agree, registered, trademark, non, profit, organization, foundation, inc, use, creative, attribution, sharealike, license, rendered, parsoid, last, edited, 2026, utc, hidden, infobox, locally, defined, parameters, different, retrieved, https, org, index, php, title, 6df_galaxy_survey, oldid, 1344384290, outer, space, portals, category, wigglez, vvds, vimos, vlt, las, campanas, lamost, gama, assembly, des, cfa, califa, calar, alto, integral, palfa, ohio, nvss, hipass, gass, galex, arecibo, bass, radio, wise, wide, explorer, vista, scuba, ukidss, ukirt, iras, satellite, akari, astro, infra, red, sluggs, pdsss, palomar, distant, solar, system, ngs, poss, iphas, int, photometric, alpha, dss, digitized, photographic, wmap, planck, illustris, project, cobe, boomerang, observations, shape, reionization, scale, quasar, group, filament, lambda, cdm, model, quintessence, matter, fluid, ultimate, fate, expanding, accelerating, friedmann, equations, flrw, metric, present, nucleosynthesis, inflation, gravitational, wave, neutrino, radiation, past, religious, interpretations, theory, discovery, copernican, cosmogony, observable, chronology, age, homepage, dressler, djorgovski, davis, jarrett, 2000, dr7, abazajian, colless, dr3, heath, jones, includes, recessional, cause, see, itself, therefore, alone, does, provide, accurate, three, dimensional, however, both, separately, obtain, estimators, based, early, requires, measurements, internal, dispersions, much, difficult, determination, restricts, number, usable, overall, finally, measured, discrepancy, estimated, fundamental, few, enough, allow, bao, signal, detected, low, derive, constant, uncertainty, competitive, technique, result, reported, given, effects, dust, smaller, longer, wavelengths, that, total, luminosity, dependent, orientation, provides, reliable, measure, furthermore, map, nearer, milky, way, would, otherwise, extinction, spectral, distributions, light, oldest, populations, hence, traditionally, where, younger, bluer, feature, compared, earlier, source, catalogs, there, several, advantages, choosing, these, bands, two, micron, carried, out, meter, south, wales, australia, permitting, observation, degrees, pointing, possesses, multi, object, fiber, spectrograph, 150, plate, fibers, siding, spring, covers, 000, deg, southern, approximately, ten, times, twice, areal, coverage, hosted, royal, edinburgh, university, cape, town, atlas, six, conducted, aao, data, were, public, has, mapped, nearby, over, nearly, half, 136, 304, yielded, 110, 256, extragalactic, catalog, 125, 071, subsample, motions, july, third, largest, next, anglo, australian, media, www, net, website, dec, 360, 200, radius, each, black, dot, represents, free, encyclopedia, item, other, projects, printable, version, download, pdf, print, export, switch, parser, get, shortened, url, cite, information, permanent, link, what, here, general, actions, english, talk, türkçe, 한국어, italiano, hrvatski, مصرى, top, personal, special, pages, recent, community, learn, help, contribute, random, current, events, navigation, jump, content,

Text of the page (random words):
6df galaxy survey wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 description 2 baryon acoustic oscillation detection 3 the peculiar velocity survey 4 references 5 external links toggle the table of contents 6df galaxy survey 5 languages مصرى hrvatski italiano 한국어 türkçe edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia redshift survey 6df galaxy survey 6df view with 10 0 degree dec 360 degree ra and 0 200 mpc radius each black dot represents a galaxy survey type redshift survey website www 6dfgs net related media on commons edit on wikidata the 6df galaxy survey six degree field galaxy survey 6df or 6dfgs is a redshift survey conducted by the anglo australian observatory aao with the 1 2m uk schmidt telescope between 2001 and 2009 the data from this survey were made public on 31 march 2009 1 the survey has mapped the nearby universe over nearly half the sky its 136 304 spectra have yielded 110 256 new extragalactic redshifts and a new catalog of 125 071 galaxies for a subsample of 6df a peculiar velocity survey is measuring mass distribution and bulk motions of the local universe as of july 2009 it is the third largest redshift survey next to the sloan digital sky survey sdss and the 2df galaxy redshift survey 2dfgrs description edit the 6df survey covers 17 000 deg 2 of the southern sky which is approximately ten times the area of the 2dfgrs 2 and more than twice the spectroscopic areal coverage of the sloan digital sky survey 3 all redshifts and spectra are available through the 6dfgs online database hosted at the royal observatory edinburgh an online 6dfgs atlas is available through the university of cape town the survey was carried out with the 1 2 meter uk schmidt telescope at siding spring observatory in new south wales australia with the 6df instrument permitting the observation of a field of 6 degrees per pointing the instrument possesses a multi object fiber spectrograph with 150 optical fibers per field plate one feature of the 6df galaxy survey compared to earlier redshift and peculiar velocity surveys is its near infrared source selection the main target catalogs are selected from the two micron all sky survey 4 there are several advantages of choosing galaxies in these bands the near infrared spectral energy distributions of galaxies are dominated by the light of their oldest stellar populations and hence the bulk of their stellar mass traditionally surveys have selected target galaxies in the optical where galaxies dominated by younger bluer stars the effects of dust extinction are smaller at longer wavelengths for the target galaxies this means that the total near infrared luminosity is not dependent on galaxy orientation and so provides a reliable measure of galaxy mass furthermore this means the 6df can map the local universe nearer to the plane of the milky way than would otherwise be possible through optical selection baryon acoustic oscillation detection edit the 6df survey is one of the few surveys which are big enough to allow a baryon acoustic oscillation bao signal to be detected the low redshift of 6df made it possible to derive the hubble constant h 0 with an uncertainty competitive with the distance ladder technique the result is reported in beutler et al 2011 5 and is given by h 0 67 3 2 km s mpc the peculiar velocity survey edit the redshift of a galaxy includes the recessional velocity cause by the expansion of the universe see hubble s law and the peculiar velocity of the galaxy itself therefore a redshift survey alone does not provide an accurate three dimensional distribution for the galaxies however by measuring both components separately it is possible to obtain a survey of the peculiar velocities of the galaxies in the 6df survey distance estimators are based on the fundamental plane of early type galaxies 6 this requires measurements of the galaxies internal velocity dispersions which is much more difficult than the determination of the redshift this restricts the number of galaxies usable for the peculiar velocity survey to about 10 of the overall 6df galaxies finally the peculiar velocities can be measured as the discrepancy between the redshift and the estimated distance references edit the 6df galaxy survey dr3 heath jones et al 2009 2dfgrs colless et al 2001 sdss dr7 abazajian et al 2009 2mass jarrett et al 2000 beutler et al 2011 fp dressler et al 1987 djorgovski davis 1987 external links edit 6df homepage 6dfgs online database v t e cosmology background age of the universe big bang chronology of the universe timeline of the universe universe observable universe cosmic distance ladder cosmogony history of cosmological theories cosmological principle copernican principle discovery of cosmic microwave background history of the big bang theory religious interpretations of the big bang timeline of cosmological theories past universe cosmic background radiation cosmic microwave background cosmic neutrino background gravitational wave background inflation nucleosynthesis present universe flrw metric friedmann equations hubble s law expansion of the universe accelerating expansion redshift future universe future of an expanding universe ultimate fate of the universe components dark energy dark fluid dark matter quintessence lambda cdm model structure formation galaxy filament galaxy formation large quasar group large scale structure reionization shape of the universe structure formation observations 2df 6df boomerang cobe illustris project observational cosmology planck sdss wmap astronomy portal v t e astronomical surveys photographic digitized sky survey dss the int photometric h alpha survey iphas ngs poss palomar distant solar system survey pdsss sluggs infra red 2mass akari astro f infrared astronomical satellite iras ukirt infrared deep sky survey ukidss scuba 2 all sky survey vista wide field infrared survey explorer wise radio c bass galex arecibo sdss survey gass hipass nvss ohio sky survey palfa survey spectroscopic 2df galaxy redshift survey 2dfgrs 6df galaxy survey 6dfgs calar alto legacy integral field area survey califa cfa redshift survey dark energy survey des deep2 redshift survey deep2 galaxy and mass assembly survey gama lamost las campanas redshift survey sloan digital sky survey sdss vimos vlt deep survey vvds wigglez category commons portals stars outer space retrieved from https en wikipedia org w index php title 6df_galaxy_survey oldid 1344384290 categories astronomical surveys observational astronomy hidden categories articles with short description short description is different from wikidata articles using infobox astronomical survey using locally defined parameters this page was last edited on 20 march 2026 at 03 16 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie statement mobile view search search toggle the table of contents 6df galaxy survey 5 languages add topic