Results 71 to 80 of about 170,295 (243)

Advancing rare cancer research by MALDI mass spectrometry imaging: Applications, challenges, and future perspectives in sarcoma

open access: yesPROTEOMICS, Volume 24, Issue 12-13, June 2024.
Abstract MALDI mass spectrometry imaging (MALDI imaging) uniquely advances cancer research, by measuring spatial distribution of endogenous and exogenous molecules directly from tissue sections. These molecular maps provide valuable insights into basic and translational cancer research, including tumor biology, tumor microenvironment, biomarker ...
Maren Nicole Stillger   +4 more
wiley   +1 more source

Are Nuclear Star Clusters the Precursors of Massive Black Holes?

open access: yesAdvances in Astronomy, Volume 2012, Issue 1, 2012., 2012
We present new upper limits for black hole masses in extremely late type spiral galaxies. We confirm that this class of galaxies has black holes with masses less than 106M⊙, if any. We also derive new upper limits for nuclear star cluster masses in massive galaxies with previously determined black hole masses.
Nadine Neumayer   +2 more
wiley   +1 more source

Chemical Feature of Eu abundance in the Draco dwarf spheroidal galaxy [PDF]

open access: yes, 2015
Chemical abundance of r-process elements in nearby dwarf spheroidal (dSph) galaxies is a powerful tool to probe the site of r-process since their small-mass scale can sort out individual events producing r-process elements.
T. Tsujimoto   +3 more
semanticscholar   +1 more source

Exploring the Evolution of a Dwarf Spheroidal Galaxy with Smoothed-particle Hydrodynamics Simulations. I. Stellar Feedback

open access: yesThe Astrophysical Journal
A fundamental question regarding the evolution of dwarf spheroidal galaxies is the identification of the key physical mechanisms responsible for gas depletion.
Roberto Hazenfratz   +3 more
doaj   +1 more source

Maximally self-interacting dark matter: models and predictions

open access: yesJournal of High Energy Physics, 2020
We study self-interacting dark matter (SIDM) scenarios, where the s-wave self-scattering cross section almost saturates the Unitarity bound. Such self-scattering cross sections are singly parameterized by the dark matter mass, and are featured by strong ...
Ayuki Kamada   +2 more
doaj   +1 more source

Molecular Gas Properties in Young Stellar Clusters with a Suppressed Star Cluster Wind

open access: yesThe Astrophysical Journal Letters, 2023
In compact and dense star-forming clouds a global star cluster wind could be suppressed. In this case stellar feedback is unable to expel the leftover gas from the cluster. Young massive stars remain embedded in a dense residual gas and stir it by moving
Sergiy Silich   +3 more
doaj   +1 more source

Updated Bounds on Axion‐Like Particle Dark Matter with the Optical MUSE‐Faint Survey

open access: yesAnnalen der Physik, Volume 536, Issue 1, January 2024.
This study presents bounds on the axion‐like particle (ALP) to two‐photon coupling in the mass range $2.65‐5.27$ eV. The signal from ALP decay are sought in the Multi Unit Spectroscopic Explorer (MUSE) observations of five dwarf spheroidal galaxies, under the assumption that ALPs make up the whole dark matter.
Elisa Todarello
wiley   +1 more source

Pulsar‐Driven Jets in Supernovae, Gamma‐Ray Bursts, and the Universe

open access: yesAdvances in Astronomy, Volume 2012, Issue 1, 2012., 2012
The bipolarity of Supernova 1987A can be understood through its very early light curve from the CTIO 0.4 m telescope and IUE FES and following speckle observations of the “Mystery Spot”. These indicate a beam/jet of light/particles, with initial collimation factors >104 and velocities >0.95 c, involving up to 10−5 M⊙ interacting with circumstellar ...
John Middleditch   +1 more
wiley   +1 more source

MAGELLAN/M2FS SPECTROSCOPY OF THE RETICULUM 2 DWARF SPHEROIDAL GALAXY [PDF]

open access: yes, 2015
We present results from spectroscopic observations with the Michigan/Magellan Fiber System (M2FS) of 182 stellar targets along the line of sight (LOS) to the newly discovered “ultrafaint” object Reticulum 2 (Ret 2).
M. Walker   +6 more
semanticscholar   +1 more source

Implications and Applications of Kinematic Galaxy Scaling Relations

open access: yesInternational Scholarly Research Notices, Volume 2012, Issue 1, 2012., 2012
Galaxy scaling relations, which describe a connection between ostensibly unrelated physical characteristics, testify to an underlying order in galaxy formation that requires understanding. I review the development of a scaling relation that (1) unites the well‐known fundamental plane (FP) relation of giant elliptical galaxies and Tully‐Fisher (TF ...
Dennis Zaritsky   +2 more
wiley   +1 more source

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