| Naslov: | UHECR mass composition from anisotropy of their arrival directions with the Telescope Array SD |
|---|
| Avtorji: | ID Kuznetsov, M. (Avtor)
ID Lundquist, Jon Paul (Avtor), et al. |
|---|
| Datoteke: |  ICRC2021_294.pdf (3,02 MB)
MD5: 5592BF706E639D5EB4068686AD693AA3
 https://pos.sissa.it/395/294/
https://pos.sissa.it/395/294/pdf
|
|---|
| Jezik: | Angleški jezik |
|---|
| Vrsta gradiva: | Delo ni kategorizirano |
|---|
| Tipologija: | 1.08 - Objavljeni znanstveni prispevek na konferenci |
|---|
| Organizacija: | UNG - Univerza v Novi Gorici
|
|---|
| Opis: | We propose a new method for the estimation of ultra-high energy cosmic ray (UHECR) mass composition from a distribution of their arrival directions. The method employs a test statistic (TS) based on a characteristic deflection of UHECR events with respect to the distribution of luminous matter in the local Universe modeled with a flux-weighed 2MRS catalog. Making realistic simulations of the mock UHECR sets, we show that this TS is robust to the presence of galactic and non-extreme extra-galactic magnetic fields and sensitive to the mass composition of events in a set.
We apply the method to Telescope Array surface detector data for 11 years and derive new independent constraints on fraction of protons and iron in p-Fe mix at E>10 EeV. At 10<E<100 EeV the data favors increase of allowed proton fraction and decrease of allowed iron fraction, while at E>100 EeV --- pure iron or even more massive composition. This result is in tension with Auger composition model inferred from spectrum-Xmax fit at 2.7σ (2.0σ) for PT'11 (JF'12) regular GMF model. |
|---|
| Ključne besede: | Telescope Array, indirect detection, surface detection, ground array, ultra-high energy, cosmic rays, composition, anisotropy, magnetic fields, 2MRS |
|---|
| Status publikacije: | Objavljeno |
|---|
| Leto izida: | 2022 |
|---|
| PID: | 20.500.12556/RUNG-8528  |
|---|
| COBISS.SI-ID: | 167012611 |
|---|
| DOI: | 10.22323/1.395.0294 |
|---|
| NUK URN: | URN:SI:UNG:REP:9OMT9ESH |
|---|
| Datum objave v RUNG: | 04.10.2023 |
|---|
| Število ogledov: | 1916 |
|---|
| Število prenosov: | 6 |
|---|
| Metapodatki: |    |
|---|
|
:
|
Kopiraj citat |
|---|
| | | | Skupna ocena: | (0 glasov) |
|---|
| Vaša ocena: | Ocenjevanje je dovoljeno samo prijavljenim uporabnikom. |
|---|
| Objavi na: |  |
|---|
Postavite miškin kazalec na naslov za izpis povzetka. Klik na naslov izpiše
podrobnosti ali sproži prenos. |
