Repozitorij Univerze v Novi Gorici

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Naslov:High-redshift supernova rates measured with the gravitational telescope A 1689
Avtorji:Petrushevska, Tanja (Avtor)
Amanullah, R. (Avtor)
Goobar, Ariel (Avtor)
Fabbro, S. (Avtor)
Johansson, Joel (Avtor)
Kjellsson, Tor (Avtor)
Lidman, Chris (Avtor)
Paech, K. (Avtor)
Richard, Johan (Avtor)
Dahle, H. (Avtor)
Ferretti, Raphael (Avtor)
Kneib, J.P. (Avtor)
Limousin, M. (Avtor)
Nordin, Jakob (Avtor)
Stanishev, V. (Avtor)
et al.
Datoteke:Gradivo nima datotek. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Aims. We present a ground-based, near-infrared search for lensed supernovae behind the massive cluster Abell 1689 at z = 0.18, which is one of the most powerful gravitational telescopes that nature provides. Methods. Our survey was based on multi-epoch J-band observations with the HAWK-I instrument on VLT, with supporting optical data from the Nordic Optical Telescope. Results. Our search resulted in the discovery of five photometrically classified, core-collapse supernovae with high redshifts of 0.671 < z < 1.703 and magnifications in the range ∆m = −0.31 to −1.58 mag, as calculated from lensing models in the literature. Owing to the power of the lensing cluster, the survey had the sensitivity to detect supernovae up to very high redshifts, z ∼ 3, albeit for a limited region of space. We present a study of the core-collapse supernova rates for 0.4 ≤ z < 2.9, and find good agreement with previous estimates and predictions from star formation history. During our survey, we also discovered two Type Ia supernovae in A 1689 cluster members, which allowed us to determine the cluster Ia rate to be 0.14+0.19 −0.09 ± 0.01 SNuB h 2 (SNuB ≡ 10−12 SNe L −1 ,B yr−1), where the error bars indicate 1σ confidence intervals, statistical and systematic, respectively. The cluster rate normalized by the stellar mass is 0.10+0.13 −0.06 ± 0.02 in SNuM h 2 (SNuM ≡ 10−12 SNe M−1 yr−1). Furthermore, we explore the optimal future survey for improving the core-collapse supernova rate measurements at z & 2 using gravitational telescopes, and for detections with multiply lensed images, and we find that the planned WFIRST space mission has excellent prospects. Conclusions. Massive clusters can be used as gravitational telescopes to significantly expand the survey range of supernova searches, with important implications for the study of the high-z transient Universe.
Ključne besede:supernovae: general – gravitational lensing: strong – galaxies: star formation – galaxies: clusters: individual: A 1689 – techniques: photometric
Leto izida:2016
Št. strani:21
Številčenje:594, A54
COBISS_ID:4997883 Povezava se odpre v novem oknu
URN:URN:SI:UNG:REP:HBI7ABIW
DOI:10.1051/0004-6361/201628925 Povezava se odpre v novem oknu
Število ogledov:2359
Število prenosov:0
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Področja:Gradivo ni uvrščeno v področja.
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Skupna ocena:(0 glasov)
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Gradivo je del revije

Naslov:Astronomy and Astrophysics
Skrajšan naslov:A&A
Založnik:ESO
Leto izida:2016

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