Results 31 to 40 of about 1,109,137 (355)

The Fornax 3D project: Unveiling the thick disk origin in FCC 170; possible signs of accretion [PDF]

Astronomy & Astrophysics, 2019
We present and discuss the stellar kinematics and populations of the S0 galaxy FCC 170 (NGC 1381) in the Fornax cluster, using deep MUSE data from the Fornax 3D survey.
F. Pinna, J. Falc'on-Barroso, M. Martig, M. Sarzi, L. Coccato, E. Iodice, E. Corsini, P. Zeeuw, D. Gadotti, R. Leaman, M. Lyubenova, R. McDermid, I. Minchev, L. Morelli, G. Ven, S. I. A. D. Canarias, D. Astrof'isica, U. L. Laguna, A. R. Institute, Liverpool John Moore's University, Centre for Astrophysics Research, U. Hertfordshire, E. Observatory, I. -. Capodimonte, D. Galilei', U. Padova, I. Padova, S. Leiden, Leiden University, Max-Planck-Institut fuer extraterrestrische Physik, M. Astronomie, D. Physics, Astronomy, M. University, L. I. A. Potsdam, I. D. A. Y. C. Planetarias, U. Atacama, S. Observatorium, Universiteit Gent   +38 more
semanticscholar   +1 more source

The TESS-Keck Survey. II. An Ultra-short-period Rocky Planet and Its Siblings Transiting the Galactic Thick-disk Star TOI-561

Astronomical Journal, 2020
We report the discovery of TOI-561, a multiplanet system in the galactic thick disk that contains a rocky, ultra-short-period planet. This bright (V = 10.2) star hosts three small transiting planets identified in photometry from the NASA TESS mission ...
L. Weiss, F. Dai, D. Huber, J. Brewer, K. Collins, D. Ciardi, E. Matthews, C. Ziegler, S. Howell, N. Batalha, I. Crossfield, C. Dressing, B. Fulton, A. Howard, H. Isaacson, S. Kane, E. Petigura, P. Robertson, Arpita Roy, R. Rubenzahl, J. Twicken, Z. Claytor, K. Stassun, M. Macdougall, A. Chontos, S. Giacalone, P. Dalba, T. Močnik, M. Hill, C. Beard, J. A. Murphy, L. Rosenthal, A. Behmard, J. V. Zandt, J. Lubin, M. Kosiarek, M. Lund, J. Christiansen, R. Matson, C. Beichman, J. Schlieder, E. Gonzales, C. Briceño, N. Law, A. Mann, K. Collins, P. Evans, A. Fukui, E. Jensen, F. Murgas, N. Narita, E. Pallé, H. Parviainen, R. Schwarz, T. Tan, J. Acton, E. Bryant, A. Chaushev, P. Eigmüller, S. Gill, J. Jenkins, G. Ricker, S. Seager, J. Winn   +63 more
semanticscholar   +1 more source

Phylogeny of the Milky Way’s inner disk and bulge populations: Implications for gas accretion, (the lack of) inside-out thick disk formation, and quenching [PDF]

Astronomy & Astrophysics, 2018
We show that the bulge and the disk of the Milky Way (MW) at R ≲ 7 kpc are well described by a unique chemical evolution and a two-phase star formation history (SFH). We argue that the populations within this inner disk, not the entire disk, are the same,
M. Haywood, P. Matteo, M. Lehnert, O. Snaith, F. Fragkoudi, S. Khoperskov   +5 more
semanticscholar   +1 more source

The age of the Galaxy's thick disk [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractWe discuss the age of the stellar disks in the solar neighborhood. After reviewing the various methods for age dating, we discuss current estimates of the ages of both the thin- and the thick disks. We present preliminary results for kinematically-selected stars that belong to the thin- as well as the thick disk.
Sofia Feltzing, Thomas Bensby
openaire   +3 more sources

Black Hole Accretion with Saturated Magnetic Pressure and Disk Wind

The Astrophysical Journal, 2023
We construct an analytical black hole accretion disk model that incorporates both magnetic pressure and disk wind, which are found to be important from numerical simulations.
Jiahui Huang, Hua Feng, Wei-Min Gu, Wen-Biao Wu   +3 more
doaj   +1 more source

Stability of general relativistic static thick disks: the isotropic Schwarzschild thick disk [PDF]

General Relativity and Gravitation, 2007
17 ...
Maximiliano Ujevic, Patricio S. Letelier
openaire   +4 more sources

The Physical Thickness of Stellar Disks to z ∼ 2

The Astrophysical Journal, 2023
In local disk galaxies such as our Milky Way, older stars generally inhabit a thicker disk than their younger counterparts. Two competing models have attempted to explain this result: one in which stars first form in thin disks that gradually thicken ...
Kathleen A. Hamilton-Campos, Raymond C. Simons, Molly S. Peeples, Gregory F. Snyder, Timothy M. Heckman   +4 more
doaj   +1 more source

THE MAGNESIUM ABUNDANCE IN THE THIN AND THICK DISK OF THE GALAXY

Odessa Astronomical Publications, 2017
The chemical evolution of the thin and thick disk of our Galaxy was investigated in framework of the opened model with gas inflow. It was supposed that the thin and thick disks separate chemically and spatially and have different evolution timescales ...
T. V. Nykytyuk, T. V. Mishenina
doaj   +1 more source

High-resolution Chemical Abundances of the Nyx Stream

The Astrophysical Journal, 2023
Nyx is a nearby, prograde, and high-eccentricity stellar stream physically contained in the thick disk, but its origin is unknown. Nyx could be the remnant of a disrupted dwarf galaxy, in which case the associated dark matter substructure could affect ...
Shuyu Wang, Lina Necib, Alexander P. Ji, Xiaowei Ou, Mariangela Lisanti, Mithi A. C. de los Reyes, Allison L. Strom, Mimi Truong   +7 more
doaj   +1 more source

Impact of the Accretion Disk Thickness on the Polarization of the Thermal Emission from Stellar Mass Black Holes

The Astrophysical Journal, 2023
The Imaging X-ray Polarimetry Explorer, launched in 2021 December, enables precision measurements of the energy-dependent polarization of the X-ray emission from stellar mass and supermassive black holes.
Andrew Thomas West, Henric Krawczynski
doaj   +1 more source