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The Astrophysical Journal Supplement (ApJS)

Resumen/Descripción – provisto por la editorial en inglés
The Astrophysical Journal Supplement is an open access journal publishing significant articles containing extensive data or calculations. ApJS also supports Special Issues, collections of thematically related papers published simultaneously in a single volume.
Palabras clave – provistas por la editorial

astronomy; astrophysics

Disponibilidad
Institución detectada Período Navegá Descargá Solicitá
No detectada desde dic. 1996 / hasta dic. 2023 IOPScience

Información

Tipo de recurso:

revistas

ISSN impreso

0067-0049

ISSN electrónico

1538-4365

Editor responsable

American Astronomical Society (AAS)

Idiomas de la publicación

  • inglés

País de edición

Reino Unido

Información sobre licencias CC

https://creativecommons.org/licenses/by/4.0/

Cobertura temática

Tabla de contenidos

Catalog of Solar Failed Eruptions and Other Dynamic Features Registered by SDO/AIA

Tomasz MrozekORCID; Sylwester KołomańskiORCID; Marek StęślickiORCID; Dominik GronkiewiczORCID

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 21

The Galactic Plane Infrared Polarization Survey (GPIPS): Data Release 4

Dan P. ClemensORCID; L. R. CashmanORCID; C. CernyORCID; A. M. El-BatalORCID; K. E. JamesonORCID; R. MarchwinskiORCID; J. MontgomeryORCID; M. PavelORCID; A. Pinnick; B. W. TaylorORCID

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 23

Forecasting Chemical Abundance Precision for Extragalactic Stellar Archaeology

Nathan R. SandfordORCID; Daniel R. WeiszORCID; Yuan-Sen TingORCID

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 24

A Catalog of RV Variable Star Candidates from LAMOST

Zhijia TianORCID; Xiaowei Liu; Haibo Yuan; Xuan FangORCID; Bingqiu Chen; Maosheng XiangORCID; Yang HuangORCID; Shaolan BiORCID; Wuming YangORCID; Yaqian WuORCID; Chun Wang; Huawei ZhangORCID; Zhiying Huo; Yong YangORCID; Gaochao Liu; Jincheng GuoORCID; Meng Zhang

<jats:title>Abstract</jats:title> <jats:p>Radial velocity (RV) variable stars are important in astrophysics. The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) spectroscopic survey has provided ∼6.5 million stellar spectra in its Data Release 4 (DR4). During the survey ∼4.7 million unique sources were targeted and ∼1 million stars observed repeatedly. The probabilities of stars being RV variables are estimated by comparing the observed RV variations with simulated ones. We build a catalog of 80,702 RV variable candidates with probability greater than 0.60 by analyzing the multi-epoch sources covered by LAMOST DR4. Simulations and cross-identifications show that the purity of the catalog is higher than 80%. The catalog consists of 77% binary systems and 7% pulsating stars as well as 16% pollution by single stars. 3138 RV variables are classified through cross-identifications with published results in literatures. By using the 3138 sources common in both LAMOST and a collection of published RV variable catalogs, we are able to analyze LAMOST’s RV variable detection rate. The efficiency of the method adopted in this work relies not only on the sampling frequency of observations but also periods and amplitudes of RV variables. With the progress of LAMOST, Gaia, and other surveys, more and more RV variables will be confirmed and classified. This catalog is valuable for other large-scale surveys, especially for RV variable searches. The catalog will be released according to the LAMOST Data Policy via <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://dr4.lamost.org" xlink:type="simple">http://dr4.lamost.org</jats:ext-link>.</jats:p>

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 22

Magnetic Field Dropouts at Near-Sun Switchback Boundaries: A Superposed Epoch Analysis

W. M. FarrellORCID; R. J. MacDowallORCID; J. R. Gruesbeck; S. D. BaleORCID; J. C. KasperORCID

<jats:title>Abstract</jats:title> <jats:p>During Parker Solar Probe’s first close encounter with the Sun in early 2018 November, a large number of impulsive rotations in the magnetic field were detected within 50 <jats:italic>R</jats:italic> <jats:sub>s</jats:sub>; these also occurred in association with short-lived impulsive solar wind bursts in speed. These impulsive features are now called “switchback” events. We examined a set of these switchbacks where the boundary transition into and out of the switchback was abrupt, with fast <jats:italic>B</jats:italic> rotations and simultaneous solar wind speed changes occurring on timescales of less than ∼10 s; these thus appear as step function-like changes in the radial component of <jats:italic>B</jats:italic> and <jats:italic>V</jats:italic>. Our objective was to search for any diamagnetic effects that might occur especially if the boundaries are associated with quick changes in density (i.e., a steep spatial density gradient at the switchback boundary). We identified 25 switchback entries where the radial component of <jats:italic>B</jats:italic>, <jats:italic>B</jats:italic> <jats:sub>r</jats:sub>, quickly transitioned from large negative to positive values and <jats:italic>V</jats:italic> <jats:sub>r</jats:sub> simultaneously abruptly increased (i.e., step-up transitions) and 28 switchback exits where <jats:italic>B</jats:italic> <jats:sub>r</jats:sub> quickly transitioned from large positive to negative values and <jats:italic>V</jats:italic> <jats:sub>r</jats:sub> simultaneously abruptly decreased (i.e., step-down transitions). We then performed a superposed epoch analysis on each of these sets of events. We found these fast-transitioning events typically had a clear and distinct decrease in the magnetic field magnitude by 7%–8% detected exactly at the boundary. The presence of the <jats:inline-formula> <jats:tex-math> <?CDATA $| B| $?> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="apjsab9ebaieqn1.gif" xlink:type="simple" /> </jats:inline-formula> dropout suggests there is a diamagnetic current present at the boundary.</jats:p>

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 28

ECoPANN: A Framework for Estimating Cosmological Parameters Using Artificial Neural Networks

Guo-Jian WangORCID; Si-Yao Li; Jun-Qing Xia

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 25

Formation of Complex Organic Molecules in Cold Interstellar Environments through Nondiffusive Grain-surface and Ice-mantle Chemistry

Mihwa JinORCID; Robin T. GarrodORCID

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 26

The Molecular Clouds Associated with the H ii Regions/Candidates between L = 207.°7 and L = 211.°7

Chong LiORCID; Hongchi WangORCID; Miaomiao Zhang; Yuehui MaORCID; Lianghao Lin

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 27

Mapping the Galactic Disk with the LAMOST and Gaia Red Clump Sample. I. Precise Distances, Masses, Ages, and 3D Velocities of ∼140,000 Red Clump Stars

Yang HuangORCID; Ralph Schönrich; Huawei Zhang; Yaqian Wu; Bingqiu Chen; Haifeng WangORCID; Maosheng XiangORCID; Chun Wang; Haibo Yuan; Xinyi Li; Weixiang Sun; Ji Li; Xiaowei Liu

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 29

The R-Process Alliance: Fourth Data Release from the Search for R-process-enhanced Stars in the Galactic Halo

Erika M. HolmbeckORCID; Terese T. HansenORCID; Timothy C. BeersORCID; Vinicius M. PlaccoORCID; Devin D. WhittenORCID; Kaitlin C. RasmussenORCID; Ian U. RoedererORCID; Rana Ezzeddine; Charli M. SakariORCID; Anna FrebelORCID; Maria R. Drout; Joshua D. Simon; Ian B. Thompson; Joss Bland-HawthornORCID; Brad K. GibsonORCID; Eva K. Grebel; Georges KordopatisORCID; Andrea KunderORCID; Jorge MeléndezORCID; Julio F. Navarro; Warren A. Reid; George Seabroke; Matthias SteinmetzORCID; Fred Watson; Rosemary F. Ġ. Wyse

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 30