Results 11 to 20 of about 2,833,165 (330)

Accelerating Stellar Photometric Distance Estimates with Neural Networks

The Astronomical Journal
Building on the Bayesian approach to estimating stellar distances from broadband photometry, we show that the computation can be accelerated by about an order of magnitude by using neural networks. Focusing on the case of the ugrizy filter complement for
Karlo Mrakovčić, Željko Ivezić, Lovro Palaversa   +2 more
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Cepheids as distance indicators and stellar tracers

The Astronomy and Astrophysics Review
AbstractWe review the phenomenology of classical Cepheids (CCs), Anomalous Cepheids (ACs) and type II Cepheids (TIICs) in the Milky Way (MW) and in the Magellanic Clouds (MCs). We also examine the Hertzsprung progression in different stellar systems by using the shape of I-band light curves (Fourier parameters) and observables based on the difference ...
Bono G., Braga V. F., Pietrinferni A.
openaire   +5 more sources

THE UNIT OF STELLAR DISTANCE

Publications of the Astronomical Society of the Pacific, 1913
H. D. Curtis
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An Isolated Stellar-mass Black Hole Detected through Astrometric Microlensing [PDF]

Astrophysical Journal, 2022
We report the first unambiguous detection and mass measurement of an isolated stellar-mass black hole (BH). We used the Hubble Space Telescope (HST) to carry out precise astrometry of the source star of the long-duration (t E ≃ 270 days), high ...
K. Sahu, Jay Anderson, S. Casertano, H. Bond, A. Udalski, M. Dominik, A. Calamida, A. Bellini, T. Brown, M. Rejkuba, V. Bajaj, N. Kains, H. Ferguson, Chris L. Fryer, P. Yock, P. Mróz, S. Kozłowski, P. Pietrukowicz, R. Poleski, J. Skowron, I. Soszyński, M. Szymański, K. Ulaczyk, L. Wyrzykowski, J. Beaulieu, J. Marquette, A. Cole, K. Hill, S. Dieters, C. Coutures, D. Dominis-Prester, É. Bachelet, J. Menzies, M. Albrow, K. Pollard, A. Gould, J. Yee, W. Allen, L. Almeida, G. Christie, J. Drummond, A. Gal-yam, E. Gorbikov, F. Jablonski, Chung-Uk Lee, D. Maoz, I. Manulis, J. Mccormick, T. Natusch, R. Pogge, Y. Shvartzvald, U. Jørgensen, K. Alsubai, M. Andersen, V. Bozza, S. C. Novati, T. Hinse, M. Hundertmark, T. Husser, E. Kerins, P. Longa-Peña, L. Mancini, M. Penny, S. Rahvar, D. Ricci, S. Sajadian, J. Skottfelt, C. Snodgrass, J. Southworth, J. Tregloan-Reed, J. Wambsganss, O. Wertz, Y. Tsapras, R. Street, D. Bramich, K. Horne, Iain A. Steele STScI, Psu, U. Warsaw, U. S. Andrews, Eső, U. Columbia, Los Alamons Nat. Lab., U. Auckland, U. Warwick, 1. U. Tasmania, Iap Paris, U. Bordeaux, Nat. Astron. Obs. Japan, Las Cumbres Obs., Saao, S. Africa, U. Canterbury, N. Zealand., Max-Planck-Inst., Heidelberg, Ohio state Univ., Cfa, Cambridge, Vintage Lane Obs, U. Valencia, Spain., Auckland Obs. New Zealand, Possum Obs. New Zealand, Univ. Southern Queensland, Australia., Weizmann Inst of Sci, Israel, T. Univ., K. Astron, Sp Sci Institute, Weizmann Inst of Sci, Farm Cove Obs, Irasr, U. Copenhagen, Denmark., Qeeri, Doha, Qatar, U. Salerno, Italy, Istit. Naz. Fis. Nucl., Napoli, Ipac, Pasadena, Inst. Astron., Toruń, Poland., Chungnam Nat. Univ., S. Korea, U. Heidelberg, H Germany, U. Gottingen, Jodrell Bank Centre Astroph., Manchester, UK., U. Antofagasta, Chile., U. Rome, -INAF, Turin, Louisiana State Univ., B. Rouge, Usa, Sharif Univ. of Tech., Tehran, Iran, Padova, Isfahan Univ. Tech., Isfahan, Open University, M. Keynes, U. Edinburgh, Keele Univ., Staffordshire, U. Atacama, U. Liege, R Belgium, N. Dhabi, Uae, Liverpool John Moores Univ., Ogle Collaboration, PLANETRoboNET Collaboration, microFUN Collaboration, MiNDSTEp Consortium, R. Collaboration   +165 more
semanticscholar   +1 more source

Gaia Data Release 3: Analysis of the Gaia BP/RP spectra using the General Stellar Parameterizer from Photometry [PDF]

Astronomy & Astrophysics, 2022
We present the General Stellar Parameterizer from Photometry (GSP-Phot), which is part of the astrophysical parameters inference system (Apsis). GSP-Phot is designed to produce a homogeneous catalogue of parameters for hundreds of millions of single non ...
R. Andrae, M. Fouesneau, R. Sordo, C. Bailer-Jones, T. Dharmawardena, J. Rybizki, F. Angeli, H. Lindstrøm, D. Marshall, R. Drimmel, A. Korn, C. Soubiran, N. Brouillet, L. Casamiquela, H. Rix, A. Aramburu, M. A. Álvarez, J. Bakker, I. Bellas-Velidis, A. Bijaoui, E. Brugaletta, A. Burlacu, R. Carballo, L. Chaoul, A. Chiavassa, G. Contursi, W. J. Cooper, O. Creevey, C. Dafonte, A. Dapergolas, P. Laverny, L. Delchambre, C. Demouchy, B. Edvardsson, Y. Fr'emat, D. Garabato, P. Garc'ia-Lario, M. Garc'ia-Torres, A. Gavel, A. Gomez, I. Gonz'alez-Santamar'ia, D. Hatzidimitriou, U. Heiter, A. Piccolo, M. Kontizas, G. Kordopatis, A. Lanzafame, Y. Lebreton, E. Licata, E. Livanou, A. Lobel, A. Lorca, A. Romeo, M. Manteiga, F. Marocco, N. Mary, C. Nicolas, C. Ordenovic, F. Pailler, P. Palicio, L. Pallas-Quintela, C. Panem, B. Pichon, E. Poggio, A. Recio-Blanco, F. Riclet, C. Robin, R. Santoveña, L. Sarro, M. Schultheis, M. Ségol, A. Silvelo, I. Ślęzak, R. Smart, M. Suveges, F. Th'evenin, G. T. Elipe, A. Ulla, E. Utrilla, A. Vallenari, E. W. Dillen, H. Zhao, J. Zorec   +82 more
semanticscholar   +1 more source

Research on the Detection Method of Projection Stellar Target Simulator

Photonics, 2023
The projection stellar target simulator is a stellar target simulator in which star points are projected to be imaged on a fixed plane at a fixed distance.
Jianan Kang, Ru Zheng, Lingyun Wang, Chengwei Pang, Guangxi Li   +4 more
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Painting a portrait of the Galactic disc with its stellar clusters [PDF]

Astronomy & Astrophysics, 2020
Context.The large astrometric and photometric survey performed by theGaiamission allows for a panoptic view of the Galactic disc and its stellar cluster population.
T. Cantat-Gaudin, F. Anders, A. Castro-Ginard, C. Jordi, M. Romero-Gómez, C. Soubiran, L. Casamiquela, Y. Tarricq, A. Moitinho, A. Vallenari, A. Bragaglia, A. Krone-Martins, M. Kounkel   +12 more
semanticscholar   +1 more source

Measuring the Mass of the Large Magellanic Cloud with Stellar Streams Observed by S 5 [PDF]

Astrophysical Journal, 2021
Stellar streams are excellent probes of the underlying gravitational potential in which they evolve. In this work, we fit dynamical models to five streams in the Southern Galactic hemisphere, combining observations from the Southern Stellar Stream ...
N. Shipp, D. Erkal, A. Drlica-Wagner, Ting S. Li, A. Pace, Sergey E. Koposov, L. Cullinane, G. Costa, A. Ji, K. Kuehn, G. Lewis, D. Mackey, J. Simpson, Z. Wan, D. Zucker, J. Bland-Hawthorn, P. Ferguson, Sophia Lilleengen, Sdss Collaboration   +18 more
semanticscholar   +1 more source

The Absolute Age of M92

The Astronomical Journal, 2023
The absolute age of a simple stellar population is of fundamental interest for a wide range of applications but is difficult to measure in practice, as it requires an understanding of the uncertainties in a variety of stellar evolution processes as well ...
Jiaqi (Martin) Ying, Brian Chaboyer, Emily M. Boudreaux, Catherine Slaughter, Michael Boylan-Kolchin, Daniel Weisz   +5 more
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S 5: The Orbital and Chemical Properties of One Dozen Stellar Streams [PDF]

Astrophysical Journal, 2021
We report the kinematic, orbital, and chemical properties of 12 stellar streams with no evident progenitors using line-of-sight velocities and metallicities from the Southern Stellar Stream Spectroscopic Survey (S 5), proper motions from Gaia EDR3, and ...
Ting S. Li, A. Ji, A. Pace, D. Erkal, Sergey E. Koposov, N. Shipp, G. Costa, L. Cullinane, K. Kuehn, G. Lewis, D. Mackey, J. Simpson, D. Zucker, P. Ferguson, S. Martell, J. Bland-Hawthorn, E. Balbinot, K. Tavangar, A. Drlica-Wagner, Gayandhi M. De Silva1, J. Simon, Sdss Collaboration   +21 more
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