Browsing by Author "Herner, K"

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    ItemOpen Access
    Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
    (arXiv e-prints, 2021-05) Collaboration, DES; Abbott, TMC; Aguena, M; Alarcon, A; Allam, S; Alves, O; Amon, A; Andrade-Oliveira, F; Annis, J; Avila, S; Bacon, D; Baxter, E; Bechtol, K; Becker, MR; Bernstein, GM; Bhargava, S; Birrer, S; Blazek, J; Brandao-Souza, A; Bridle, SL; Brooks, D; Buckley-Geer, E; Burke, DL; Camacho, H; Campos, A; Carnero Rosell, A; Carrasco Kind, M; Carretero, J; Castander, FJ; Cawthon, R; Chang, C; Chen, A; Chen, R; Choi, A; Conselice, C; Cordero, J; Costanzi, M; Crocce, M; da Costa, LN; da Silva Pereira, ME; Davis, C; Davis, TM; De Vicente, J; DeRose, J; Desai, S; Di Valentino, E; Diehl, HT; Dietrich, JP; Dodelson, S; Doel, P; Doux, C; Drlica-Wagner, A; Eckert, K; Eifler, TF; Elsner, F; Elvin-Poole, J; Everett, S; Evrard, AE; Fang, X; Farahi, A; Fernandez, E; Ferrero, I; Ferté, A; Fosalba, P; Friedrich, O; Frieman, J; García-Bellido, J; Gatti, M; Gaztanaga, E; Gerdes, DW; Giannantonio, T; Giannini, G; Gruen, D; Gruendl, RA; Gschwend, J; Gutierrez, G; Harrison, I; Hartley, WG; Herner, K; Hinton, SR; Hollowood, DL; Honscheid, K; Hoyle, B; Huff, EM; Huterer, D; Jain, B; James, DJ; Jarvis, M; Jeffrey, N; Jeltema, T; Kovacs, A; Krause, E; Kron, R; Kuehn, K; Kuropatkin, N; Lahav, O; Leget, P-F; Lemos, P; Liddle, AR; Lidman, C; Lima, M; Lin, H; MacCrann, N; Maia, MAG; Marshall, JL; Martini, P; McCullough, J; Melchior, P; Mena-Fernández, J; Menanteau, F; Miquel, R; Mohr, JJ; Morgan, R; Muir, J; Myles, J; Nadathur, S; Navarro-Alsina, A; Nichol, RC; Ogando, RLC; Omori, Y; Palmese, A; Pandey, S; Park, Y; Paz-Chinchón, F; Petravick, D; Pieres, A; Plazas Malagón, AA; Porredon, A; Prat, J; Raveri, M; Rodriguez-Monroy, M; Rollins, RP; Romer, AK; Roodman, A; Rosenfeld, R; Ross, AJ; Rykoff, ES; Samuroff, S; Sánchez, C; Sanchez, E; Sanchez, J; Sanchez Cid, D; Scarpine, V; Schubnell, M; Scolnic, D; Secco, LF; Serrano, S; Sevilla-Noarbe, I; Sheldon, E; Shin, T; Smith, M; Soares-Santos, M; Suchyta, E; Swanson, MEC; Tabbutt, M; Tarle, G; Thomas, D; To, C; Troja, A; Troxel, MA; Tucker, DL; Tutusaus, I; Varga, TN; Walker, AR; Weaverdyck, N; Weller, J; Yanny, B; Yin, B; Zhang, Y; Zuntz, J
    We present the first cosmology results from large-scale structure in the Dark Energy Survey (DES) spanning 5000 deg$^2$. We perform an analysis combining three two-point correlation functions (3$\times$2pt): (i) cosmic shear using 100 million source galaxies, (ii) galaxy clustering, and (iii) the cross-correlation of source galaxy shear with lens galaxy positions. The analysis was designed to mitigate confirmation or observer bias; we describe specific changes made to the lens galaxy sample following unblinding of the results. We model the data within the flat $\Lambda$CDM and $w$CDM cosmological models. We find consistent cosmological results between the three two-point correlation functions; their combination yields clustering amplitude $S_8=0.776^{+0.017}_{-0.017}$ and matter density $\Omega_{\mathrm{m}} = 0.339^{+0.032}_{-0.031}$ in $\Lambda$CDM, mean with 68% confidence limits; $S_8=0.775^{+0.026}_{-0.024}$, $\Omega_{\mathrm{m}} = 0.352^{+0.035}_{-0.041}$, and dark energy equation-of-state parameter $w=-0.98^{+0.32}_{-0.20}$ in $w$CDM. This combination of DES data is consistent with the prediction of the model favored by the Planck 2018 cosmic microwave background (CMB) primary anisotropy data, which is quantified with a probability-to-exceed $p=0.13$ to $0.48$. When combining DES 3$\times$2pt data with available baryon acoustic oscillation, redshift-space distortion, and type Ia supernovae data, we find $p=0.34$. Combining all of these data sets with Planck CMB lensing yields joint parameter constraints of $S_8 = 0.812^{+0.008}_{-0.008}$, $\Omega_{\mathrm{m}} = 0.306^{+0.004}_{-0.005}$, $h=0.680^{+0.004}_{-0.003}$, and $\sum m_{\nu}<0.13 \;\mathrm{eV\; (95\% \;CL)}$ in $\Lambda$CDM; $S_8 = 0.812^{+0.008}_{-0.008}$, $\Omega_{\mathrm{m}} = 0.302^{+0.006}_{-0.006}$, $h=0.687^{+0.006}_{-0.007}$, and $w=-1.031^{+0.030}_{-0.027}$ in $w$CDM. (abridged)
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    ItemOpen Access
    Optical follow-up of gravitational wave triggers with DECam during the first two LIGO/VIRGO observing runs
    Herner, K; Annis, J; Brout, D; Soares-Santos, M; Kessler, R; Sako, M; Butler, R; Doctor, Z; Palmese, A; Allam, S; Tucker, DL; Sobreira, F; Yanny, B; Diehl, HT; Frieman, J; Glaeser, N; Garcia, A; Sherman, NF; Bechtol, K; Berger, E; Chen, HY; Conselice, CJ; Cook, E; Cowperthwaite, PS; Davis, TM; Drlica-Wagner, A; Farr, B; Finley, D; Foley, RJ; Garcia-Bellido, J; Gill, MSS; Gruendl, RA; Holz, DE; Kuropatkin, N; Lin, H; Marriner, J; Marshall, JL; Matheson, T; Neilsen, E; Paz-Chinchón, F; Sauseda, M; Scolnic, D; Williams, PKG; Avila, S; Bertin, E; Buckley-Geer, E; Burke, DL; Rosell, AC; Carrasco-Kind, M; Carretero, J; da Costa, LN; De Vicente, J; Desai, S; Doel, P; Eifler, TF; Everett, S; Fosalba, P; Gaztanaga, E; Gerdes, DW; Gschwend, J; Gutierrez, G; Hartley, WG; Hollowood, DL; Honscheid, K; James, DJ; Krause, E; Kuehn, K; Lahav, O; Li, TS; Lima, M; Maia, MAG; March, M; Menanteau, F; Miquel, R; Plazas, AA; Sanchez, E; Scarpine, V; Schubnell, M; Serrano, S; Sevilla-Noarbe, I; Smith, M; Suchyta, E; Tarle, G; Wester, W; Zhang, Y
    Gravitational wave (GW) events detectable by LIGO and Virgo have several possible progenitors, including black hole mergers, neutron star mergers, black hole--neutron star mergers, supernovae, and cosmic string cusps. A subset of GW events are expected to produce electromagnetic (EM) emission that, once detected, will provide complementary information about their astrophysical context. To that end, the LIGO--Virgo Collaboration (LVC) sends GW candidate alerts to the astronomical community so that searches for their EM counterparts can be pursued. The DESGW group, consisting of members of the Dark Energy Survey (DES), the LVC, and other members of the astronomical community, uses the Dark Energy Camera (DECam) to perform a search and discovery program for optical signatures of LVC GW events. DESGW aims to use a sample of GW events as standard sirens for cosmology. Due to the short decay timescale of the expected EM counterparts and the need to quickly eliminate survey areas with no counterpart candidates, it is critical to complete the initial analysis of each night's images as quickly as possible. We discuss our search area determination, imaging pipeline, and candidate selection processes. We review results from the DESGW program during the first two LIGO--Virgo observing campaigns and introduce other science applications that our pipeline enables.