Results 11 to 20 of about 1,047,569 (316)

Extreme Quasars as Distance Indicators in Cosmology [PDF]

Frontiers in Astronomy and Space Sciences, 2020
Quasars accreting matter at very high rates (known as extreme Population A [xA] quasars, possibly associated with super-Eddington accreting massive black holes) may provide a new class of distance indicators covering cosmic epochs from present day up to ...
Deborah Dultzin, Paola Marziani, J. A. de Diego, C. A. Negrete, Ascensión Del Olmo, Mary L. Martínez-Aldama, Mary L. Martínez-Aldama, Mauro D'Onofrio, Edi Bon, Natasa Bon, Giovanna M. Stirpe   +10 more
doaj   +6 more sources

Cosmological distance indicators [PDF]

Space Science Reviews, 2018
We review three distance measurement techniques beyond the local universe: (1) gravitational lens time delays, (2) baryon acoustic oscillation (BAO), and (3) HI intensity mapping.
A. Agnello, A. Eigenbrod, A. Goobar, A. Hojjati, A. Hojjati, A. More, A. Oscoz, A.G. Riess, A.M. Martin, A.S. Tagore, B.J. Brewer, C. Alcock, C. Grillo, C. Hazard, C. McCully, C. Vanderriest, C. Vuissoz, C. Vuissoz, C.D. Fassnacht, C.D. Fassnacht, C.D. Fassnacht, C.E. Rusu, C.L. Bennett, C.S. Kochanek, C.S. Kochanek, C.W. Morgan, D. Paraficz, D. Sluse, D. Walsh, D.A. Goldstein, D.A. Goldstein, D.H. Weinberg, D.J. Eisenstein, D.J. Eisenstein, E. Eulaers, E. Giannini, E. Jullo, E.E. Falco, E.O. Ofek, E.R. Switzer, F. Courbin, F. Courbin, F. Courbin, F.B. Abdalla, G. Dobler, G. Dobler, G. Efstathiou, G. Golse, G.C.F. Chen, H. Lin, H.J. Seo, H.J. Seo, I. Burud, I. Burud, I. Burud, I. Jee, I. Momcheva, J. Fohlmeister, J. Fohlmeister, J. Hjorth, J. Huchra, J. Lehar, J.R. Shaw, J.R. Shaw, J.W. Nightingale, K. Bandura, K. Liao, K.C. Wong, K.S. Dawson, K.W. Masui, K.W. Masui, L. Amendola, L. Anderson, L. Oldham, L.B. Newburgh, L.J. Hainline, L.L.R. Williams, L.V.E. Koopmans, L.V.E. Koopmans, L.V.E. Koopmans, L.V.E. Koopmans, M. Barnabè, M. Barnabè, M. Cappellari, M. Jauzac, M. Oguri, M. Oguri, M. Oguri, M. Schmidt, M. Sereno, M. Takada, M. Tegmark, M. Tegmark, M. Tewes, M. Tewes, M.A. Zwaan, M.J. Drinkwater, N. Cantale, N. Kaiser, N.A. Grogin, O. Wucknitz, P. Bull, P. Jakobsson, P. Magain, P. Magain, P. Saha, P. Schneider, P. Schneider, P. Schneider, P. Schneider, P. Young, P.A.R. Ade, P.J. Marshall, P.J.E. Peebles, P.L. Kelly, P.L. Kelly, P.L. Kelly, P.L. Schechter, R. Adam, R. Barkana, R. Blandford, R. Blandford, R. Fadely, R. Gavazzi, R. Kawamata, R. Kormann, R.B. Wayth, S. Birrer, S. Cole, S. Dye, S. Hilbert, S. Rathna Kumar, S. Rathna Kumar, S. Refsdal, S. Vegetti, S. Wallington, S. Wyithe, S.A. Rodney, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.H. Suyu, S.J. Warren, S.S. Tie, T. Kundić, T. Matsubara, T. Okumura, T. Okumura, T. Treu, T.C. Chang, T.C. Chang, T.E. Collett, V. Bonvin, V. Bonvin, V.N. Shalyapin, W. Hu, W.L. Freedman, W.N. Colley, X. Fernández, Y. Xu, Y.W. Liao, Z.S. Greene, É. Aubourg   +166 more
core   +6 more sources

Young and Intermediate-age Distance Indicators [PDF]

Space Science Reviews, 2017
Distance measurements beyond geometrical and semi-geometrical methods, rely mainly on standard candles. As the name suggests, these objects have known luminosities by virtue of their intrinsic proprieties and play a major role in our understanding of ...
A. Bhardwaj, A. Bhardwaj, A. Bhardwaj, A. Bressan, A. Gallenne, A. García-Varela, A. Nakagawa, A. Nakagawa, A. Nakagawa, A. Siebert, A. Udalski, A. Udalski, A.A. Cole, A.G. Riess, A.G. Riess, A.J. Cuesta, A.J. Monson, A.J. Monson, A.K. Dambis, A.M. Jacyszyn-Dobrzeniecka, B. Aringer, B. Paczyński, B. Schölkopf, B. Sesar, B. Westerlund, B. Zhang, B.F. Madore, B.L. Tatton, C. Alcock, C. Dvorkin, C. Min, C. Ngeow, C. Ngeow, C. Wegg, C.-C. Ngeow, C.-C. Ngeow, C.-C. Ngeow, C.-C. Ngeow, C.A. Haniff, C.D. Laney, C.D. Laney, C.G. Román-Zúñiga, C.W. McAlary, D. Graczyk, D. Huber, D. Minniti, D. Nyu, D. Stello, D. Stello, D.E. Knuth, D.J. Marshall, D.L. Nidever, E. Hubble, E. Kapakos, E. Puzeras, E.F. Schlafly, E.P. Hubble, ESA, F. Caputo, F. Leeuwen van, F. Leeuwen van, F. Leeuwen van, G. Bono, G. Bono, G. Bono, G. Bono, G. Bono, G. Fiorentino, G. Fiorentino, G. Marchi De, G. Pietrzyński, G. Pietrzyński, G. Pietrzyński, G.A. Tammann, G.F. Benedict, G.G. Fazio, G.H. Rieke, G.H. Rieke, G.M. Green, G.P. Benedetto di, G.R. Ricker, H. Kobayashi, H. Nakanishi, H. Rauer, H.-B. Yuan, H.R. Neilson, H.S. Leavitt, I. Soszyński, I. Soszyński, I. Soszyński, J. Bovy, J. Storm, J. Storm, J. Storm, J.-J. Ren, J.A. Cardelli, J.A. Rich, J.F. Koerwer, J.P. Beaulieu, J.P. Gardner, K. Fricke, K. Kusuno, K.A.G. Olsen, K.M. Flaherty, K.Z. Stanek, K.Z. Stanek, Kh.S. Rezaei, L. Girardi, L. Girardi, L. Girardi, L. Girardi, L. Inno, L. Inno, L. Inno, L.D. Matthews, L.D. Matthews, L.M. Macri, M. Marconi, M. Marconi, M. Marengo, M. Marengo, M. Marengo, M. Marengo, M. Romaniello, M. Salaris, M. Shintani, M. Wyman, M.-R.L. Cioni, M.A.C. Perryman, M.E.K. Williams, M.H. Pinsonneault, M.L. McCall, M.M. Phillips, M.S. Xiang, M.W. Feast, M.W. Feast, M.W. Feast, M.W. Werner, N. Kawaguchi, N. Matsunaga, N. Matsunaga, N. Matsunaga, N. Zacharias, N.E. Evans, N.L. Chapman, N.R. Evans, N.R. Simon, O. Bienaymé, O. Pejcha, O.L. Creevey, P. Barmby, P. Fouque, P. Fouqué, P. Kervella, P. Kervella, P. Whitelock, P.R. Wood, Planck Collaboration, R. Grijs de, R. Grijs de, R. Haschke, R. Haschke, R. Indebetouw, R. Kamohara, R.C. Kennicutt Jr., R.D. Cannon, R.E. Luck, R.I. Anderson, R.I. Anderson, R.M. Cutri, R.P. Martin, R.V. Jones, S. Bergh van den, S. Bilir, S. Kanbur, S. Nishiyama, S. Roeser, S. Rubele, S. Subramanian, S. Subramanian, S. Subramanian, S. Subramanian, S. Subramanian, S.C. Keller, S.D. Friedman, S.E. Persson, S.M. Andrievsky, T. Kamezaki, T. Kamezaki, T. Kamezaki, T. Kamezaki, T. Kurayama, T.G. Barnes, V. Ripepi, V. Scowcroft, V. Scowcroft, V. Scowcroft, V.M.R. Muggeo, V.R.M. Muggeo, W. Dehnen, W.H.T. Vlemmings, W.H.T. Vlemmings, W.L. Freedman, W.L. Freedman, W.L. Freedman, W.L. Freedman, W.L. Freedman, X.-W. Liu, Y. Asaki, Y. Huang, Y. Huang, Y. Ita, Y.K. Choi   +212 more
core   +5 more sources

Local Distance Indicators [PDF]

Symposium - International Astronomical Union, 2000
A summary is given of the calibration of the Cepheid scale required in the derivation of distances from observations at V and I, as in the HST work on extragalactic Cepheids. There is some evidence that a small metallicity correction may be necessary in deriving distances in this way.
M. W. Feast
openalex   +5 more sources

Mattig's relation and dynamical distance indicators [PDF]

Astronomische Nachrichten, 2016
AbstractWe discuss how the redshift (Mattig) method in the Friedmann cosmology relates to dynamical distance indicators based on Newton's gravity (Teerikorpi 2011). It belongs to the class of indicators where the relevant length inside the system is the distance itself (in this case the proper metric distance).
P. Teerikorpi, Yu. V. Baryshev
openalex   +7 more sources

Astrophysical Distance Scale. VII. A Self-consistent, Multiwavelength Calibration of the Slopes and Relative Zero Points for the Run of Luminosity with the Color of Stars Defining the Tip of the Red Giant Branch

The Astronomical Journal, 2023
Given the recent successful launch of the James Webb Space Telescope, determining robust calibrations of the slopes and absolute magnitudes of the near- to mid-infrared tip of the red-giant branch (TRGB) will be essential to measuring precise ...
Barry F. Madore, Wendy L. Freedman, Kayla Owens   +2 more
doaj   +1 more source

Quantifying Uncertainties on the Tip of the Red Giant Branch Method

The Astronomical Journal, 2023
We present an extensive grid of numerical simulations quantifying the uncertainties in measurements of the tip of the red giant branch (TRGB). These simulations incorporate a luminosity function composed of 2 mag of red giant branch (RGB) stars leading ...
Barry F. Madore, Wendy L. Freedman, Kayla A. Owens, In Sung Jang   +3 more
doaj   +1 more source

Drift Distance in Aircraft Glyphosate Application Using Rice Plants as Indicators [PDF]

Planta Daninha, 2020
: This study aimed to evaluate the potential for glyphosate drift during aerial application using rice plants as sentinels, aiming to determine the effect of drift on irrigated rice crops.
R.A. CÓRDOVA, M. TOMAZETTI, J.P. REFATTI, D. AGOSTINETTO, L.A. AVILA, E.R. CAMARGO   +5 more
doaj   +1 more source

CEPHEIDS AS DISTANCE INDICATORS: SOME CURRENT PROBLEMS

Odessa Astronomical Publications, 2017
A general review is given of the calibration of the Cepheid distance scale, with particular reference to its use in the determination of H0. Emphasis is placed on the advantage of using a galactic calibration of the Cepheid scale, rather than relying on ...
M. Feast
doaj   +1 more source

SELECTION OF DIGITAL TOOLS FOR ORGANIZING STUDENTS' GROUP WORK IN DISTANCE EDUCATION

Інформаційні технології і засоби навчання, 2023
The transformation of classical education into distance education has become increasingly relevant, especially given the challenging conditions posed by the COVID-19 pandemic and military operations in our country.
Olena G. Glazunova, Andrii M. Hurzhii, Valentyna I. Korolchuk, Tetiana V. Voloshyna   +3 more
doaj   +1 more source