Results 81 to 90 of about 370,839 (289)
A 2–3 billion year old major merger paradigm for the Andromeda galaxy and its outskirts [PDF]
, 2018 Recent observations of our neighbouring galaxy M31 have revealed that its disk was shaped by widespread events. The evidence for this includes the high dispersion ($V/\sigma$ $\le$ 3) of stars older than 2 Gyr, and a global star formation episode, 2-4 ...
F. Hammer +6 more
semanticscholar +1 more source
Was the Andromeda Stream Produced by a Disk Galaxy? [PDF]
The Astrophysical Journal, 2008 The halo region of M31 exhibits a startling level of stellar inhomogeneities, the most prominent of which is the "giant southern stream". Our previous analysis indicates that this stream, as well as several other observed features, are products of the tidal disruption of a single satellite galaxy with stellar mass ~10^9 solar masses less than 1 Gyr ago.
Mark A. Fardal +7 more
openaire +4 more sources
Systems biology of responses to simultaneous copper and iron deficiency in Arabidopsis
The Plant Journal, Volume 103, Issue 6, Page 2119-2138, September 2020., 2020 Summary Plant responses to coincident nutrient deficiencies cannot be predicted from the responses to individual deficiencies. Although copper (Cu) and iron (Fe) are essential micronutrients for plant growth that are often and concurrently limited in soils, the combinatorial response to Cu‐Fe deficiency remains elusive.
Antoni Garcia‐Molina +3 more
wiley +1 more source
The need for speed: escape velocity and dynamical mass measurements of the Andromeda galaxy [PDF]
, 2018 Our nearest large cosmological neighbour, the Andromeda galaxy (M31), is a dynamical system, and an accurate measurement of its total mass is central to our understanding of its assembly history, the life-cycles of its satellite galaxies, and its role in
P. Kafle +4 more
semanticscholar +1 more source
Signatures of the M31-M32 Galactic Collision [PDF]
The Astrophysical Journal Letters, 788:L38 (6pp), 2014 June 20, 2014 The unusual morphologies of the Andromeda spiral galaxy (M31) and its dwarf companion M32 have been characterized observationally in great detail. The two galaxies' apparent proximity suggests that Andromeda's prominent star-forming ring as well as M32's compact elliptical structure may result from a recent collision.
arxiv +1 more source
The Astronomical Journal, 2023 Stellar kinematics and metallicity are key to exploring formation scenarios for galactic disks and halos. In this work, we characterized the relationship between kinematics and photometric metallicity along the line of sight to M31's disk.
Ivanna Escala +7 more
doaj +1 more source
On the α/Fe Bimodality of the M31 Disks
The Astrophysical Journal Letters, 2023 An outstanding question is whether the α /Fe bimodality exists in disk galaxies other than in the Milky Way. Here we present a bimodality using our state-of-the-art galactic chemical evolution models that can explain various observations in the Andromeda
Chiaki Kobayashi +3 more
doaj +1 more source
SEEN AND UNSEEN TIDAL CAUSTICS IN THE ANDROMEDA GALAXY [PDF]
The Astrophysical Journal, 2010 ApJ ...
Sanderson, Robyn Ellyn +1 more
openaire +6 more sources
Recent Results from SPLASH: Chemical Abundances and Kinematics of Andromeda's Stellar Halo [PDF]
, 2016 Large scale surveys of Andromeda's resolved stellar populations have revolutionized our view of this galaxy over the past decade. The combination of large-scale, contiguous photometric surveys and pointed spectroscopic surveys has been particularly powerful for discovering substructure and disentangling the structural components of Andromeda.
arxiv +1 more source
On the Blueshift of the Andromeda Galaxy
Communications of the Byurakan Astrophysical ObservatoryThe observed spectral shift of galaxies is usually interpreted using the Doppler effect. However, attention should be paid to other possible mechanisms of spectral shift.
H. Harutyunian, A. A. Torosyan
semanticscholar +1 more source