Zobrazeno 1 - 10
of 942
pro vyhledávání: '"Stellar masses"'
Autor:
Emily R. Liepold, Chung-Pei Ma
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 2, p L29 (2024)
We construct the z = 0 galaxy stellar mass function (GSMF) by combining the GSMF at stellar masses M _* ≲ 10 ^11.3 M _⊙ from the census study of Leja et al. and the GSMF of massive galaxies at M _* ≳ 10 ^11.5 M _⊙ from the volume-limited MASS
Externí odkaz:
https://doaj.org/article/210275d0b4ee40a79db8e4c9f9eff682
Autor:
Nancy Remage Evans, Pierre Kervella, Joanna Kuraszkiewicz, H. Moritz Günther, Richard I. Anderson, Charles Proffitt, Alexandre Gallenne, Antoine Mérand, Boris Trahin, Giordano Viviani, Shreeya Shetye
Publikováno v:
The Astronomical Journal, Vol 168, Iss 5, p 221 (2024)
Cepheid masses continue to be important tests of evolutionary tracks for intermediate-mass stars as well as important predictors of their future fate. For systems where the secondary is a B star, Hubble Space Telescope ultraviolet spectra have been o
Externí odkaz:
https://doaj.org/article/02333605281041c084350b5167d37247
Autor:
Nancy Remage Evans, Gail H. Schaefer, Alexandre Gallenne, Guillermo Torres, Elliott P. Horch, Richard I. Anderson, John D. Monnier, Rachael M. Roettenbacher, Fabien Baron, Narsireddy Anugu, James W. Davidson Jr., Pierre Kervella, Garance Bras, Charles Proffitt, Antoine Mérand, Margarita Karovska, Jeremy Jones, Cyprien Lanthermann, Stefan Kraus, Isabelle Codron, Howard E. Bond, Giordano Viviani
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 190 (2024)
The 30 yr orbit of the Cepheid Polaris has been followed with observations by the Center for High Angular Resolution Astronomy (CHARA) Array from 2016 through 2021. An additional measurement has been made with speckle interferometry at the Apache Poi
Externí odkaz:
https://doaj.org/article/7c3ba5741f58471792c01d41d6d9f3cc
Autor:
Nancy Remage Evans, Alexandre Gallenne, Pierre Kervella, Antoine Mérand, John Monnier, Richard I Anderson, H. Moritz Günther, Charles Proffitt, Elaine M. Winston, Grzegorz Pietrzynski, Wolfgang Gieren, Joanna Kuraszkiewicz, Narsireddy Anugu, Rachael M. Roettenbacher, Cyprien Lanthermann, Mayra Gutierrez, Gail Schaefer, Benjamin R. Setterholm, Noura Ibrahim, Stefan Kraus
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 145 (2024)
The Cepheid AW Per is a component in a multiple system with a long-period orbit. The radial velocities of Griffin cover the 38 yr orbit well. An extensive program of interferometry with the Center for High Angular Resolution Astronomy array is report
Externí odkaz:
https://doaj.org/article/05c127c3eae6454381619399bc24a007
On the Determination of Stellar Mass and Binary Fraction of Open Clusters within 500 pc from the Sun
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 71 (2024)
We investigated the stellar mass function and the binary fraction of 114 nearby open clusters (OCs) using the high-precision photometric data from Gaia Data Release 3 (Gaia DR3). We estimated the mass of member stars by using a ridge line that is bet
Externí odkaz:
https://doaj.org/article/1c9e5b54ecee485eb4d482f4700e987d
Autor:
Guillermo Torres, Gail H. Schaefer, Robert P. Stefanik, David W. Latham, Andrew F. Boden, Narsireddy Anugu, Jeremy W. Jones, Robert Klement, Stefan Kraus, Cyprien Lanthermann, John D. Monnier
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 31 (2024)
We report long-baseline interferometric observations with the CHARA Array that resolve six previously known double-lined spectroscopic binary systems in the Hyades cluster, with orbital periods ranging from 3 to 358 days: HD 27483, HD 283882, HD 2687
Externí odkaz:
https://doaj.org/article/1cc85ce0070443c4b45d108eeb5363ff
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 56 (2024)
Determining the mass of neutron stars is crucial for understanding their formation, evolution, and interior structure. Currently, only a few dozen neutron stars have had their masses measured, and most of them belong to binary systems. However, there
Externí odkaz:
https://doaj.org/article/8fb765f7a20b4d05ac547a2a34cb29a5
Autor:
Alexander Stone-Martinez, Jon A. Holtzman, Julie Imig, Christian Nitschelm, Keivan G. Stassun, Joel R. Brownstein
Publikováno v:
The Astronomical Journal, Vol 167, Iss 2, p 73 (2024)
We derive distances and masses of stars from the Sloan Digital Sky Survey (SDSS) Apache Point Observatory Galactic Evolution Experiment Data Release 17 using simple neural networks. Training data for distances comes from Gaia EDR3, supplemented by li
Externí odkaz:
https://doaj.org/article/6a7c4567fc2d4b5a92d6860bd9656d74
Publikováno v:
The Astrophysical Journal, Vol 960, Iss 2, p 121 (2024)
We report spectroscopic observations of vB 120 (HD 30712), a 5.7 yr astrometric–spectroscopic binary system in the Hyades cluster. We combine our radial velocities with others from the literature, and with existing speckle interferometry measuremen
Externí odkaz:
https://doaj.org/article/2beb0d94b3c944988ff1067ef4ae7afe
Publikováno v:
The Astrophysical Journal Letters, Vol 945, Iss 2, p L21 (2023)
Recent controversy regarding the existence of massive ( $\mathrm{log}({M}_{* }/{M}_{\odot })\gtrsim 11$ ) galaxies at z > 6 poses a challenge for galaxy formation theories. Hence, it is of critical importance to understand the effects of SED fitting
Externí odkaz:
https://doaj.org/article/4839b2c1495746ca9f753ac7189d5dff