Navegação Ciências Exatas e da Terra por Assunto "Dark matter"
Resultados 1-20 de 22
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Birds of a Feather? : Magellan/IMACS spectroscopy of the ultra-faint satellites Grus II, Tucana IV, and Tucana V
(2020) [Artigo de periódico]We present Magellan/IMACS spectroscopy of three recently discovered ultra-faint Milky Way satellites, Grus II, Tucana IV, and Tucana V. We measure systemic velocities of vhel =- 110.0 0.5 - km s 1 , = - + vhel 15.9 1.7 ... -
Farthest neighbor : the distant Milky Way satellite Eridanus II
(2017) [Artigo de periódico]We present Magellan/IMACS spectroscopy of the recently discovered Milky Way satellite EridanusII (Eri II). We identify 28 member stars in EriII, from which we measure a systemic radial velocity of vhel = 75.6 1.3 (stat.) ... -
Globular cluster streams as galactic high-precision scales : the poster child Palomar 5
(2015) [Artigo de periódico]Using the example of the tidal stream of the Milky Way globular cluster Palomar 5 (Pal 5), we demonstrate how observational data on tidal streams can be efficiently reduced in dimensionality and modeled in a Bayesian ... -
Is diffuse intracluster light a good tracer of the galaxy cluster matter distribution?
(2021) [Artigo de periódico]We explore the relation between diffuse intracluster light (central galaxy included) and the galaxy cluster (baryonic and dark) matter distribution using a sample of 528 clusters at 0.2 ≤ z ≤ 0.35 found in the Dark Energy ... -
Milky Way satellite census : II. Galaxy–halo connection constraints including the impact of the Large Magellanic Cloud
(2020) [Artigo de periódico]The population of Milky Way (MW) satellites contains the faintest known galaxies and thus provides essential insight into galaxy formation and dark matter microphysics. Here we combine a model of the galaxy–halo connection ... -
Nearest neighbor : the low-mass Milky Way satellite Tucana III
(2017) [Artigo de periódico]We present Magellan/IMACS spectroscopy of the recently discovered Milky Way satellite TucanaIII (Tuc III). We identify 26 member stars in TucIII from which we measure a mean radial velocity of vhel=−102.3±0.4 (stat.)±2.0(sys.) ... -
On the accuracy of the perturbative approach for strong lensing : local distortion for pseudo-elliptical models
(2013) [Artigo de periódico]The perturbative approach (PA) introduced by Alard provides analytic solutions for gravitational arcs by solving the lens equation linearized around the Einstein ring solution. This is a powerful method for lens inversion ... -
Search for dark matter particles produced in association with a Higgs boson in proton-proton collisions at √s = 13 TeV
(2020) [Artigo de periódico]A search for dark matter (DM) particles is performed using events with a Higgs boson candidate and large missing transverse momentum. The analysis is based on proton- proton collision data at a center-of-mass energy of 13 ... -
Search for dark matter produced in association with a Higgs boson decaying to γγ or τ+τ- at √s = 13TeV
(2018) [Artigo de periódico]A search for dark matter particles is performed by looking for events with large transverse momentum imbalance and a recoiling Higgs boson decaying to either a pair of photons or a pair of leptons. The search is based on ... -
Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √s = 13 TeV
(2019) [Artigo de periódico]A search for dark matter produced in association with top quarks in protonproton collisions at a center-of-mass energy of 13TeV is presented. The data set used corresponds to an integrated luminosity of 35.9 fb1 recorded ... -
Search for gamma-ray emission from DES dwarf spheroidal galaxy candidates with Fermi-LAT data
(2015) [Artigo de periódico]Due to their proximity, high dark-matter (DM) content, and apparent absence of non-thermal processes, Milky Way dwarf spheroidal satellite galaxies (dSphs) are excellent targets for the indirect detection of DM. Recently, ... -
Search for heavy neutrinos and third-generation leptoquarks in hadronic states of two T leptons and two jets in proton-proton collisions at √s = 13 TeV
(2019) [Artigo de periódico]A search for new particles has been conducted using events with two high transverse momentum leptons that decay hadronically and at least two energetic jets. The analysis is performed using data from proton-proton collisions ... -
Search for long-lived particles decaying into muon pairs in proton-proton collisions at √s = 13 TeV collected with a dedicated high-rate data stream
(2022) [Artigo de periódico]A search for long-lived particles decaying into muon pairs is performed using proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experi- ment at the LHC in 2017 and 2018, corresponding to ... -
Search for natural and split supersymmetry in proton-proton collisions at √s =13 TeV in final states with jets and missing transverse momentum
(2018) [Artigo de periódico]Abstract: A search for supersymmetry (SUSY) is performed in nal states comprising one or more jets and missing transverse momentum using data from proton-proton collisions at a centre-of-mass energy of 13TeV. The data were ... -
Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at √s = 13 TeV
(2021) [Artigo de periódico]A search is presented for new particles produced at the LHC in proton-proton collisions at s√ = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample ... -
Search for new physics in final states with a single photon and missing transverse momentum in proton-proton collisions at √s = 13 TeV
(2019) [Artigo de periódico]A search is conducted for new physics in nal states containing a photon and missing transverse momentum in proton-proton collisions at p s = 13TeV, using the data collected in 2016 by the CMS experiment at the LHC, ... -
Search for resonant production of strongly coupled dark matter in proton-proton collisions at 13 TeV
(2022) [Artigo de periódico]The first collider search for dark matter arising from a strongly coupled hidden sector is presented and uses a data sample corresponding to 138 fb−1 , collected with the CMS detector at the CERN LHC, at √ s = 13 TeV. The ... -
Searching for dark matter annihilation in recently discovered Milky Way satellites with Fermi-LAT
(2017) [Artigo de periódico]We search for excess γ-ray emission coincident with the positions of confirmed and candidate Milky Way satellite galaxies using six years of data from the Fermi Large Area Telescope (LAT). Our sample of 45 stellar systems ... -
Stellar kinematics and metallicities in the ultra-faint dwarf galaxy Reticulum II
(2015) [Artigo de periódico]We present Magellan/M2FS, Very Large Telescope/GIRAFFE, and Gemini South/GMOS spectroscopy of the newly discovered Milky Way satellite Reticulum II. Based on the spectra of 25 Ret II member stars selected from Dark Energy ... -
The first tidally disrupted ultra-faint dwarf galaxy? : a spectroscopic analysis of the Tucana III stream
(2018) [Artigo de periódico]We present a spectroscopic study of the tidal tails and core of the Milky Way satellite Tucana III, collectively referred to as the Tucana III stream, using the 2dF+AAOmega spectrograph on the Anglo-Australian Telescope ...