Results 51 to 60 of about 7,707 (224)

Time-domain studies of M31 [PDF]

Astronomical Review, 2016
M31, our closest neighboring galaxy, is a stepping stone to studies of stellar evolution, star formation, galaxy evolution, and cosmology. However, due to the difficulties of performing photometry in such crowded fields and the lack of wide cameras to encompass the entire galaxy, there has not been a complete census of the stellar contents of M31.
openaire   +2 more sources

Microlensing by stars in the disk of M31 [PDF]

The Astrophysical Journal, 1994
The optical depth to microlensing toward M31 due to known stars in the disk of M31 itself is $τ\sim 2\times 10^{-7}e^{-r/d}$ where $d$ is the disk scale length and $r$ is the distance along the major axis. Thus, there can be significant lensing toward the M31 disk even if M31 contains no dark compact objects.
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Contrasting Maternal, Paternal, and Biparental Ancestry of Populations From the Caribbean Coast of Colombia

American Journal of Biological Anthropology, Volume 189, Issue 4, April 2026.
ABSTRACT Objectives The current Caribbean Colombian population is the result of migration processes and admixture that occurred throughout the country's history. The aim of this study was to investigate genetic ancestry gradients throughout the Caribbean territory, with a higher Native American ancestry expected in inland areas compared to coastal ...
Masinda Nguidi, Christina Amory, Catarina Xavier, Gabriela Huber, Filipa Simão, Beatriz Martinez, Luis Caraballo, Leonor Gusmão, Walther Parson   +8 more
wiley   +1 more source

Exploring the Structures and Substructures of the Andromeda Satellite Dwarf Galaxies Cassiopeia III, Perseus I, and Lacerta I

The Astronomical Journal, 2023
We present results from wide-field imaging of the resolved stellar populations of the dwarf spheroidal galaxies Cassiopeia III (And XXXII) and Perseus I (And XXXIII), two satellites in the outer stellar halo of the Andromeda galaxy (M31).
Katherine L. Rhode, Nicholas J. Smith, Denija Crnojevic, David J. Sand, Ryan A. Lambert, Enrico Vesperini, Madison V. Smith, Steven Janowiecki, John J. Salzer, Ananthan Karunakaran, Kristine Spekkens   +10 more
doaj   +1 more source

Rebreeding of Female Mountain Lions After Litter Mortality

Ecology and Evolution, Volume 16, Issue 4, April 2026.
We documented rapid rebreeding by female mountain lions (Puma concolor) following litter loss, including the shortest known rebreeding interval to date. These observations highlight the importance of infanticide and intraguild competition in shaping female fitness and population dynamics.
Mark A. Peyton, Brian D. Jansen, James W. Cain III, Jonathan A. Jenks   +3 more
wiley   +1 more source

The Fate of the Milky Way–Andromeda System: To Merge or Not?

The Astrophysical Journal Letters
It has long been predicted that the Milky Way (MW) will eventually merge with Andromeda (M31), a view reinforced by Hubble Space Telescope measurements indicating a small M31 transverse velocity. However, using updated Gaia-based proper motions (PMs) and
Hao Wu, Yang Huang, Huawei Zhang, Guangze Sun, Shi Shao   +4 more
doaj   +1 more source

Tunable Magnetoelectric Fluxguide Cancels Power Nulls in WPT Systems With Highly Misaligned Coils

Energy Technology, Volume 14, Issue 4, April 2026.
This article presents a tunable smart fluxguide made from a magnetoelectric composite to enhance positioning freedom and maintain coupling in wireless power transfer (WPT) systems. It actively distributes the magnetic field and enables to overcome unavoidable zero‐charge areas, known as “powernulls.” However, redistributing the magnetic field can ...
Hidelberto Macedo‐Zamudio, Ulrike Wallrabe   +1 more
wiley   +1 more source

The Globular Clusters and Halo of M31 [PDF]

Publications of the Astronomical Society of the Pacific, 1998
The results of two studies of M31's globular cluster system are presented. One study used deep V- and I-band images of 24 M31 globular clusters taken with CFHT's HRCam. This data is the best available ground-based data for determining structural parameters (such as core and tidal radii, ellipticities, and orientations) for M31's globular clusters.
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Machine Learning Model for an App‐Based Tool to Assist With the Diagnosis of Canine Atopic Dermatitis

Veterinary Dermatology, Volume 37, Issue 2, Page 236-246, April 2026.
Canine atopic dermatitis (cAD) is a chronic condition requiring life‐long management. Accurate diagnosis can be challenging, with no reliable diagnostic test. This study aimed to generate a simple diagnostic model for cAD. This model is a relevant prototype for an app‐based tool to support general practitioners in the diagnosis of cAD alongside ...
Xavier Langon, Mathieu Montoya, Isabelle Gourdon   +2 more
wiley   +1 more source

The nucleus of M31

The Astrophysical Journal, 1992
We calculate the broad-band spectrum expected of a 10 exp 7 solar mass black hole accreting from an ambient galactic wind in the nucleus of M31, and we discuss several testable predictions of this model: (1) when resolved, this source will probably be elongated, perhaps in the direction of the semistellar nucleus BD +40 148 deg; (2) its radio spectral ...
openaire   +1 more source