Results 1 to 10 of about 274,713 (193)

On the Root Cause of the Host “Mass Step” in the Hubble Residuals of Type Ia Supernovae

open access: yesThe Astrophysical Journal, 2023
It is well established that the Hubble residuals of Type Ia supernovae (SNe Ia) show the luminosity step with respect to their host galaxy stellar masses.
Chul Chung   +6 more
doaj   +1 more source

Chemical Homogeneity of Wide Binary Systems: An Approach from Near-Infrared Spectroscopy

open access: yesThe Astronomical Journal, 2023
Wide binaries, with separations between the two stars from a few au to more than several thousand au, are valuable objects for various research topics in Galactic astronomy.
Dongwook Lim   +4 more
doaj   +1 more source

Unraveling Joint Evolution of Bars, Star Formation, and Active Galactic Nuclei of Disk Galaxies

open access: yesThe Astrophysical Journal, 2023
We aim to unravel the interplay between bars, star formation (SF), and active galactic nuclei (AGNs) in barred galaxies. To this end, we utilize the SDSS DR12 to select a sample of nearby (0.02 < z < 0.06) disk galaxies that are suitable for bar ...
Woong-Bae G. Zee   +3 more
doaj   +1 more source

Fractional yields inferred from halo and thick disk stars [PDF]

open access: yesSerbian Astronomical Journal, 2013
Linear [Q/H]-[O/H] relations, Q = Na, Mg, Si, Ca, Ti, Cr, Fe, Ni, are inferred from a sample (N = 67) of recently studied FGK-type dwarf stars in the solar neighbourhood including different populations (Nissen and Schuster 2010, Ramirez et al ...
Caimmi R.
doaj   +1 more source

Rejuvenating Star Formation Activity in an Early-type Dwarf Galaxy, LEDA 1915372, with Accreted H i Gas

open access: yesThe Astrophysical Journal Letters, 2023
We report a rare astrophysical phenomenon, in which an early-type dwarf galaxy (dE), LEDA 1915372, is accreting gas from a nearby star-forming dwarf galaxy, MRK 0689, and is rejuvenating star formation activity at the center.
Sanjaya Paudel   +7 more
doaj   +1 more source

On the Origin and Evolution of the Intra-Cluster Light: A Brief Review of the Most Recent Developments

open access: yesGalaxies, 2021
Not all the light in galaxy groups and clusters comes from stars that are bound to galaxies. A significant fraction of it constitutes the so-called intracluster or diffuse light (ICL), a low surface brightness component of groups/clusters generally found
Emanuele Contini
doaj   +1 more source

Formation of a Massive Lenticular Galaxy Under the Tidal Interaction with a Group of Dwarf Galaxies

open access: yesThe Astrophysical Journal Letters, 2023
Based on the atomic-hydrogen (H i ) observations using the Five-hundred-meter Aperture Spherical radio Telescope, we present a detailed study of the gas-rich massive S0 galaxy NGC 1023 in a nearby galaxy group.
Jin-Long Xu   +8 more
doaj   +1 more source

Investigating the Dominant Environmental Quenching Process in UVCANDELS/COSMOS Groups

open access: yesThe Astrophysical Journal, 2023
We explore how the fraction of quenched galaxies changes in groups of galaxies with respect to the distance to the center of the group, redshift, and stellar mass to determine the dominant process of environmental quenching in 0.2 < z < 0.8 groups.
Bonnabelle Zabelle   +38 more
doaj   +1 more source

A Rest-frame Near-IR Study of Clumps in Galaxies at 1 < z < 2 Using JWST/NIRCam: Connection to Galaxy Bulges

open access: yesThe Astrophysical Journal, 2023
A key question in galaxy evolution has been the importance of the apparent “clumpiness” of high-redshift galaxies. Until now, this property has been primarily investigated in rest-frame UV, limiting our understanding of their relevance.
Boris S. Kalita   +6 more
doaj   +1 more source

JWST Reveals a Population of Ultrared, Flattened Galaxies at 2 ≲ z ≲ 6 Previously Missed by HST

open access: yesThe Astrophysical Journal Letters, 2023
With just a month of data, JWST is already transforming our view of the universe, revealing and resolving starlight in unprecedented populations of galaxies.
Erica J. Nelson   +25 more
doaj   +1 more source

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