A late-time transition in the cosmic dark energy?
Abstract We study constraints from the latest cosmic microwave background (CMB), large-scale structure (2dF, Abell/ACO, PSCz) and SN1a data on dark energy models with a sharp transition in their equation of state, w(z). Such a transition is motivated by models like vacuum metamorphosis where non-per...
Gespeichert in:
| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2002-11, Vol.336 (4), p.1217-1222 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 1222 |
|---|---|
| container_issue | 4 |
| container_start_page | 1217 |
| container_title | Monthly notices of the Royal Astronomical Society |
| container_volume | 336 |
| creator | Bassett, Bruce A. Kunz, Martin Silk, Joseph Ungarelli, Carlo |
| description | Abstract
We study constraints from the latest cosmic microwave background (CMB), large-scale structure (2dF, Abell/ACO, PSCz) and SN1a data on dark energy models with a sharp transition in their equation of state, w(z). Such a transition is motivated by models like vacuum metamorphosis where non-perturbative quantum effects are important at late times. We allow the transition to occur at a specific redshift, z
t, to a final negative pressure −1 ⩽w
f < −1/3. We find that the CMB and supernovae data, in particular, prefer a late-time transition because of the associated delay in cosmic acceleration. The best fits (±1 σ errors) to all the data are z
t= 2.0+2.2
−0.76, Ω
Q
= 0.73+0.02
−0.04 and w
f=−1+0.2. For z
t > 5 the likelihood becomes flat, asymptoting to the standard ΛCDM model. |
| doi_str_mv | 10.1046/j.1365-8711.2002.05887.x |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_27209374</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><oup_id>10.1046/j.1365-8711.2002.05887.x</oup_id><sourcerecordid>27209374</sourcerecordid><originalsourceid>FETCH-LOGICAL-c4747-b8a93cdfc03a557624f8e5fa31dd6e63d61898848b4730a3303a13728acd7e2e3</originalsourceid><addsrcrecordid>eNqNkE1LAzEQhoMoWKv_ISdvuyaZ3SR7EClVq1Arih_gJaTZrKbuR91ssf337nbFk4KnGZj3mWEehDAlISURP1mEFHgcSEFpyAhhIYmlFOF6Bw22A5ZwvosGhEAf2kcH3i8IIREwPkB0hHPd2KBxhcVNrUvvGleV2JW4ebPYVL5wBqe6fse2tPXr5uwQ7WU69_bouw7R4-XFw_gqmN5OrsejaWAiEYlgLnUCJs0MAR3HgrMokzbONNA05ZZDyqlMpIzkPBJANECboyCY1CYVllkYouN-77KuPlbWN6pw3tg816WtVl4xwUgCImqDsg-auvK-tpla1q7Q9UZRojpHaqE6Fap7X3WO1NaRWrfoaY9-utxu_s2pm9l917U89Hy1Wv5BB79dDXrK-cauf7jWseICRKyeZxMF57MXET8RdQdfe6WJqw</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>27209374</pqid></control><display><type>article</type><title>A late-time transition in the cosmic dark energy?</title><source>Oxford Journals Open Access Collection</source><source>Wiley Online Library Journals Frontfile Complete</source><creator>Bassett, Bruce A. ; Kunz, Martin ; Silk, Joseph ; Ungarelli, Carlo</creator><creatorcontrib>Bassett, Bruce A. ; Kunz, Martin ; Silk, Joseph ; Ungarelli, Carlo</creatorcontrib><description>Abstract
We study constraints from the latest cosmic microwave background (CMB), large-scale structure (2dF, Abell/ACO, PSCz) and SN1a data on dark energy models with a sharp transition in their equation of state, w(z). Such a transition is motivated by models like vacuum metamorphosis where non-perturbative quantum effects are important at late times. We allow the transition to occur at a specific redshift, z
t, to a final negative pressure −1 ⩽w
f < −1/3. We find that the CMB and supernovae data, in particular, prefer a late-time transition because of the associated delay in cosmic acceleration. The best fits (±1 σ errors) to all the data are z
t= 2.0+2.2
−0.76, Ω
Q
= 0.73+0.02
−0.04 and w
f=−1+0.2. For z
t > 5 the likelihood becomes flat, asymptoting to the standard ΛCDM model.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1046/j.1365-8711.2002.05887.x</identifier><language>eng</language><publisher>23 Ainslie Place , Edinburgh EH3 6AJ , UK . Telephone 226 7232 Fax 226 3803: Blackwell Science Ltd</publisher><subject>cosmic microwave background ; cosmology: miscellaneous ; cosmology: theory</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2002-11, Vol.336 (4), p.1217-1222</ispartof><rights>2002 RAS 2002</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4747-b8a93cdfc03a557624f8e5fa31dd6e63d61898848b4730a3303a13728acd7e2e3</citedby><cites>FETCH-LOGICAL-c4747-b8a93cdfc03a557624f8e5fa31dd6e63d61898848b4730a3303a13728acd7e2e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1046%2Fj.1365-8711.2002.05887.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1046%2Fj.1365-8711.2002.05887.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids></links><search><creatorcontrib>Bassett, Bruce A.</creatorcontrib><creatorcontrib>Kunz, Martin</creatorcontrib><creatorcontrib>Silk, Joseph</creatorcontrib><creatorcontrib>Ungarelli, Carlo</creatorcontrib><title>A late-time transition in the cosmic dark energy?</title><title>Monthly notices of the Royal Astronomical Society</title><addtitle>Mon. Not. R. Astron. Soc</addtitle><description>Abstract
We study constraints from the latest cosmic microwave background (CMB), large-scale structure (2dF, Abell/ACO, PSCz) and SN1a data on dark energy models with a sharp transition in their equation of state, w(z). Such a transition is motivated by models like vacuum metamorphosis where non-perturbative quantum effects are important at late times. We allow the transition to occur at a specific redshift, z
t, to a final negative pressure −1 ⩽w
f < −1/3. We find that the CMB and supernovae data, in particular, prefer a late-time transition because of the associated delay in cosmic acceleration. The best fits (±1 σ errors) to all the data are z
t= 2.0+2.2
−0.76, Ω
Q
= 0.73+0.02
−0.04 and w
f=−1+0.2. For z
t > 5 the likelihood becomes flat, asymptoting to the standard ΛCDM model.</description><subject>cosmic microwave background</subject><subject>cosmology: miscellaneous</subject><subject>cosmology: theory</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNqNkE1LAzEQhoMoWKv_ISdvuyaZ3SR7EClVq1Arih_gJaTZrKbuR91ssf337nbFk4KnGZj3mWEehDAlISURP1mEFHgcSEFpyAhhIYmlFOF6Bw22A5ZwvosGhEAf2kcH3i8IIREwPkB0hHPd2KBxhcVNrUvvGleV2JW4ebPYVL5wBqe6fse2tPXr5uwQ7WU69_bouw7R4-XFw_gqmN5OrsejaWAiEYlgLnUCJs0MAR3HgrMokzbONNA05ZZDyqlMpIzkPBJANECboyCY1CYVllkYouN-77KuPlbWN6pw3tg816WtVl4xwUgCImqDsg-auvK-tpla1q7Q9UZRojpHaqE6Fap7X3WO1NaRWrfoaY9-utxu_s2pm9l917U89Hy1Wv5BB79dDXrK-cauf7jWseICRKyeZxMF57MXET8RdQdfe6WJqw</recordid><startdate>20021111</startdate><enddate>20021111</enddate><creator>Bassett, Bruce A.</creator><creator>Kunz, Martin</creator><creator>Silk, Joseph</creator><creator>Ungarelli, Carlo</creator><general>Blackwell Science Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20021111</creationdate><title>A late-time transition in the cosmic dark energy?</title><author>Bassett, Bruce A. ; Kunz, Martin ; Silk, Joseph ; Ungarelli, Carlo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4747-b8a93cdfc03a557624f8e5fa31dd6e63d61898848b4730a3303a13728acd7e2e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>cosmic microwave background</topic><topic>cosmology: miscellaneous</topic><topic>cosmology: theory</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bassett, Bruce A.</creatorcontrib><creatorcontrib>Kunz, Martin</creatorcontrib><creatorcontrib>Silk, Joseph</creatorcontrib><creatorcontrib>Ungarelli, Carlo</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bassett, Bruce A.</au><au>Kunz, Martin</au><au>Silk, Joseph</au><au>Ungarelli, Carlo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A late-time transition in the cosmic dark energy?</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><stitle>Mon. Not. R. Astron. Soc</stitle><date>2002-11-11</date><risdate>2002</risdate><volume>336</volume><issue>4</issue><spage>1217</spage><epage>1222</epage><pages>1217-1222</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>Abstract
We study constraints from the latest cosmic microwave background (CMB), large-scale structure (2dF, Abell/ACO, PSCz) and SN1a data on dark energy models with a sharp transition in their equation of state, w(z). Such a transition is motivated by models like vacuum metamorphosis where non-perturbative quantum effects are important at late times. We allow the transition to occur at a specific redshift, z
t, to a final negative pressure −1 ⩽w
f < −1/3. We find that the CMB and supernovae data, in particular, prefer a late-time transition because of the associated delay in cosmic acceleration. The best fits (±1 σ errors) to all the data are z
t= 2.0+2.2
−0.76, Ω
Q
= 0.73+0.02
−0.04 and w
f=−1+0.2. For z
t > 5 the likelihood becomes flat, asymptoting to the standard ΛCDM model.</abstract><cop>23 Ainslie Place , Edinburgh EH3 6AJ , UK . Telephone 226 7232 Fax 226 3803</cop><pub>Blackwell Science Ltd</pub><doi>10.1046/j.1365-8711.2002.05887.x</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0035-8711 |
| ispartof | Monthly notices of the Royal Astronomical Society, 2002-11, Vol.336 (4), p.1217-1222 |
| issn | 0035-8711 1365-2966 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_27209374 |
| source | Oxford Journals Open Access Collection; Wiley Online Library Journals Frontfile Complete |
| subjects | cosmic microwave background cosmology: miscellaneous cosmology: theory |
| title | A late-time transition in the cosmic dark energy? |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-29T01%3A58%3A26IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=A%20late-time%20transition%20in%20the%20cosmic%20dark%20energy?&rft.jtitle=Monthly%20notices%20of%20the%20Royal%20Astronomical%20Society&rft.au=Bassett,%20Bruce%20A.&rft.date=2002-11-11&rft.volume=336&rft.issue=4&rft.spage=1217&rft.epage=1222&rft.pages=1217-1222&rft.issn=0035-8711&rft.eissn=1365-2966&rft_id=info:doi/10.1046/j.1365-8711.2002.05887.x&rft_dat=%3Cproquest_cross%3E27209374%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=27209374&rft_id=info:pmid/&rft_oup_id=10.1046/j.1365-8711.2002.05887.x&rfr_iscdi=true |