Results 91 to 100 of about 7,707 (224)
Fifteen Years of M31* X-Ray Variability and Flares
The Astrophysical JournalWe append an additional 15 yr (2009–2024) to the Chandra X-ray light curve of M31*, the supermassive black hole (SMBH) at the center of M31, the Andromeda galaxy. Extending and expanding on the work in Z.
Stephen DiKerby, Shuo Zhang, Jimmy Irwin
doaj +1 more source
Identification of Tetrahydrocannabidiol Metabolites in Human Urine
Drug Testing and Analysis, Volume 17, Issue 12, Page 2333-2346, December 2025.The detection of Phase I and II metabolites of tetrahydrocannabidiol (H4CBD) in urine after oral ingestion of 25‐mg H4CBD by a volunteer is described. The proposed metabolite structures are based on ESI+ spectra recorded by HPLC‐HRMS and EI spectra after trimethylsilylation recorded by GC–MS.
Willi Schirmer +3 more
wiley +1 more source
Age model of sediment core M31/2_KL23
, 1998 Age model of sediment core M31 ...
Geiselhart, Susanne +3 more
core +1 more source
Stable isotopes from sediment core M31/2_KL23
, 1998 Stable isotopes from sediment core M31 ...
Geiselhart, Susanne +3 more
core +1 more source
Massive Young Clusters in the Disk of M31 [PDF]
, 2005 We have studied the properties of a sample of 67 very blue and likely young massive clusters in M31 extracted from the Bologna Revised Catalog of globular clusters, selected according to their color [(B-V)0=3.5 Å).
De Simone, E. +5 more
core +1 more source
Chemical Evolution of M31 [PDF]
, 2014 We review chemical evolution models developed for M31 as well as the abundance determinations available for this galaxy. Then we present a recent chemical evolution model for M31 including radial gas flows and galactic fountains along the disk, as well as a model for the bulge.
Matteucci, F., Spitoni, E.
openaire +2 more sources
Results from the M31-M32 multiplex.
, 2013 Results from the M31-M32 multiplex.
Chris Stringer (67811) +5 more
core +1 more source
Deep in the Fields of the Andromeda Halo: Discovery of the Pegasus VII Dwarf Galaxy in UNIONS
The Astrophysical JournalWe present the newly discovered dwarf galaxy Pegasus VII (Peg VII), a member of the M31 subgroup which has been uncovered in the ri photometric catalogs from the Ultraviolet Near-Infrared Optical Northern Survey and confirmed with follow-up imaging from ...
Simon E. T. Smith +10 more
doaj +1 more source
The dynamics of the nucleus of M31
The Astrophysical Journal, 1982 Self-consistent dynamic models of the M31 nucleus were constructed which satisfy Stratoscope II and ground-based photometry, as well as ground-based velocity dispersion measurements. Two models designed to yield the highest and lowest mass-to-light ratios (M/L) consistent with observations are concentrated on.
S. Tremaine, J. P. Ostriker
openaire +1 more source
Relevé des nébuleuses planétaires dans Andromède (M31)
International audienceThe nearest spiral galaxy, M31, exhibits a kinematically hot stellar disc, a global star formation episode ~2-4 Gyr ago, and conspicuous substructures in its stellar halo, suggestive of a recent accretion event.
Yang, Yanbin +7 more
core +1 more source