Results 121 to 130 of about 72,254 (220)

Atmospheric and Deposition Responses of 10Be to Volcanic Eruptions Inferred From the Aerosol‐Climate Model ECHAM6.3‐HAM2.3‐SALSA2.0: 10Be

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract 10Be deposition in ice cores is widely used for solar reconstructions, but its interpretation is complicated by volcanic influences. Using the state‐of‐the‐art aerosol‐climate model ECHAM6.3‐HAM2.3‐SALSA2.0: 10Be, we assess the impacts of three major volcanic eruptions: Agung (1963), El Chichón (1982) and Pinatubo (1991). All eruptions enhance
Minjie Zheng, Raimund Muscheler, Anton Laakso, Florian Adolphi, Zhengyao Lu, Mousong Wu, Peng Chen, Qin Tao, Ulrike Lohmann   +8 more
wiley   +1 more source

A Face-on Accretion Disk Geometry Revealed by Millimeter-wave Periodicity in Sgr A∗

The Astrophysical Journal
We analyzed 77 epochs of Atacama Large Millimeter/submillimeter Array archival data to investigate flux variability in Sagittarius A ^∗ , the supermassive black hole at the Galactic center.
Kazuki Yanagisawa, Tomoharu Oka, Ryo Ariyama, Kazuki Yanagihara, Yuhei Iwata, Mikiya M. Takahashi   +5 more
doaj   +1 more source

Mapping the Growth of Supermassive Black Holes as a Function of Galaxy Stellar Mass and Redshift

The Astrophysical Journal
The growth of supermassive black holes is strongly linked to their galaxies. It has been shown that the population mean black hole accretion rate ( $\overline{\mathrm{BHAR}}$ ) primarily correlates with the galaxy stellar mass ( M _⋆ ) and redshift for ...
Fan Zou, Zhibo Yu, W. N. Brandt, Hyungsuk Tak, Guang Yang, Qingling Ni   +5 more
doaj   +1 more source

Stellar Mergers or Truly Young? Intermediate-age Stars on Highly Radial Orbits in the Milky Way’s Stellar Halo

The Astrophysical Journal
Reconstructing the mass assembly history of the Milky Way relies on obtaining detailed measurements of the properties of many stars in the galaxy, especially in the stellar halo.
Danny Horta, Yuxi (Lucy) Lu, Melissa K. Ness, Mariangela Lisanti, Adrian M. Price-Whelan   +4 more
doaj   +1 more source

Enhanced Star Formation and Black Hole Accretion Rates in Galaxy Mergers in IllustrisTNG50

The Astrophysical Journal
Many theoretical and observational studies have suggested that galaxy mergers may trigger enhanced star formation or active galactic nucleus activity.
Aimee L. Schechter, Shy Genel, Bryan Terrazas, Julia M. Comerford, Abigail Hartley, Rachel S. Somerville, Rebecca Nevin, Joseph Simon, Erica Nelson   +8 more
doaj   +1 more source

How Does Feedback Affect the Star Formation Histories of Galaxies?

The Astrophysical Journal
Star formation in galaxies is regulated by the interplay of a range of processes that shape the multiphase gas in the interstellar and circumgalactic media.
Kartheik G. Iyer, Tjitske K. Starkenburg, Greg L. Bryan, Rachel S. Somerville, Juan Pablo Alfonzo, Daniel Anglés-Alcázar, Suchetha Cooray, Romeel Davé, Austen Gabrielpillai, Shy Genel, Sultan Hassan, Lars Hernquist, Christian Kragh Jespersen, Christopher C. Lovell, Boon Kiat Oh, Camilla Pacifici, Lucia A. Perez, Laura Sommovigo, Joshua S. Speagle, Sandro Tacchella, Megan T. Tillman, Francisco Villaescusa-Navarro, John F. Wu   +22 more
doaj   +1 more source

FAST Reveals the Extended H i Halo and Accretion Signatures of NGC 2683

The Astrophysical Journal
We present the results of our recent H i observations conducted on the edge-on galaxy NGC 2683 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST).
Qian Jiao, Ming Zhu, Bernd Vollmer, Mei Ai, Haiyang Yu, Qinghua Tan, Cheng Cheng, Yang Gao   +7 more
doaj   +1 more source

Relativistic Jet Motion in the Radio-quiet LINER Galaxy KISSR 872

The Astrophysical Journal
We report superluminal jet motion with an apparent speed of β _app = 1.65 ± 0.57 in the radio-quiet (RQ) low-ionization nuclear emission-line region (LINER) galaxy KISSR 872.
Preeti Kharb, Eric G. Blackman, Eric Clausen-Brown, Mousumi Das, Daniel A. Schwartz, Aneta Siemiginowska, Smitha Subramanian, Sravani Vaddi   +7 more
doaj   +1 more source

An Excess of Active Galactic Nuclei Triggered by Galaxy Mergers in MaNGA Galaxies of Stellar Mass ∼1011 M ⊙

The Astrophysical Journal
To facilitate new studies of galaxy-merger-driven fueling of active galactic nuclei (AGNs), we present a catalog of 387 AGNs that we have identified in the final population of over 10,000 z < 0.15 galaxies observed by the Sloan Digital Sky Survey-IV ...
Julia M. Comerford, Rebecca Nevin, James Negus, R. Scott Barrows, Michael Eracleous, Francisco Müller-Sánchez, Namrata Roy, Aaron Stemo, Thaisa Storchi-Bergmann, Dominika Wylezalek   +9 more
doaj   +1 more source

Galaxy growth through accretion and mergers

, 2021
Galaxies have been the main protagonist in Cosmology and the study of the Universe for almost a century. Currently, they have become an independent and major field itself. Through the use of AMIGA, an analytic model that examines galaxy formation and evolution since the dark ages, we will study the roles of accretion and mergers as two different ways for
openaire   +1 more source