1,730,819 research outputs found
The globular cluster system of NGC 4365
No full textThis thesis investigates the formation of the galaxy NGC 4365, through the lens of its globular cluster system. Globular clusters are dense clusters of stars, almost as old as the universe and bright enough to be seen in other galaxies. The properties' of representative samples of the roughly 6500 globular clusters in NGC 4365 confirm the existence of a, possibly unique, additional group within the globular cluster population. This, combined with the study of globular clusters between NGC 4365 and a nearby galaxy, suggests that NGC 4365 formed in two stages with the first stage split into another two parts
Block Card 4365 Pennfield Road
No full textThis image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Dwelling (Toledo, Ohio) | Tudor Cottage style | eyebrow dormer | Homeville Subdivision (Toledo, Ohio) | Willys Park area (Toledo, Ohio) | West Toledo (Toledo, Ohio) | 4365 Pennfield Road (Toledo, Ohio
Block Card 4365 Imperial Drive
No full textThis image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Ranch houses | Dwelling | Talmadge Gardens Addition (Toledo, Ohio) | Westgate Area (Toledo, Ohio) | 4365 Imperial Drive (Toledo, Ohio
Block Card 4365 S. Detroit Avenue
No full textThis image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Cape Cod Style | 4365 South Detroit Avenue (Toledo, Ohio) | Dwelling | Copland Place Addition (Toledo, Ohio) | South Toledo Area (Toledo, Ohio
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The ages of globular clusters in NGC 4365 revisited with deep HST observations
No full textWe present new Hubble Space Telescope (HST) NIC3, near-infrared H-band photometry of globular clusters (GCs) around NGC 4365 and NGC 1399 in combination with archival HST WFPC2 and ACS optical data. We find that NGC 4365 has a number of globular clusters with bluer optical colors than expected for their red optical-to-near-infrared colors and an old age. The only known way to explain these colors is with a significant population of intermediate-age (2-8 Gyr) clusters in this elliptical galaxy. On the other hand, our result for NGC 1399 is in agreement with previous spectroscopic work that suggests that its clusters have a large metallicity spread and are nearly all old. In the literature, there are various results from spectroscopic studies of modest samples of NGC 4365 globular clusters. The spectroscopic data allow for either the presence or absence of a significant population of intermediate-age clusters, given the index uncertainties indicated by comparing objects in common between these studies and the few spectroscopic candidates with optical-to-near-IR colors indicative of intermediate ages. Our new near-IR data of the NGC 4365 GC system with a much higher signal-to-noise ratio agree well with earlier published photometry, and both give strong evidence of a significant intermediate-age component. The agreement between the photometric and spectroscopic results for NGC 1399 and other systems lends further confidence to this conclusion and to the effectiveness of the near-IR technique
The SLUGGS survey: globular cluster system kinematics and substructure in NGC 4365
Get PDFWe present a kinematic analysis of the globular cluster (GC) system of the giant elliptical galaxy NGC 4365 and find several distinct kinematic substructures. This analysis is carried out using radial velocities for 269 GCs, obtained with the DEIMOS (DEep Imaging Multi-Object Spectrograph) instrument on the Keck II telescope as part of the SAGES Legacy Unifying Globulars and Galaxies Survey (SLUGGS). We find that each of the three (formerly identified) GC colour subpopulations reveal distinct rotation properties. The rotation of the green GC subpopulation is consistent with the bulk of NGC 4365\u27s stellar light, which ‘rolls’ about the photometric major axis. The blue and red GC subpopulations show ‘normal’ rotation about the minor axis. We also find that the red GC subpopulation is rotationally dominated beyond 2.5 arcmin (∼17 kpc) and that the root mean squared velocity of the green subpopulation declines sharply with radius suggesting a possible bias towards radial orbits relative to the other GC subpopulations. Additionally, we find a population of low-velocity GCs that form a linear structure running from the SW to the NE across NGC 4365 which aligns with the recently reported stellar stream towards NGC 4342. These low-velocity GCs have g′ − i′ colours consistent with the overall NGC 4365 GC system but have velocities consistent with the systemic velocity of NGC 4342. We discuss the possible formation scenarios for the three GC subpopulations as well as the possible origin of the low-velocity GC population
Linked collectors and determiners for: Algunas especies de anfibios y reptiles contenidos en el Proyecto de Norma Oficial Mexicana PROY-NOM-059-ECOL-2000.
No full textNatural history specimen data linked to collectors and determiners held within, "Algunas especies de anfibios y reptiles contenidos en el Proyecto de Norma Oficial Mexicana PROY-NOM-059-ECOL-2000". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="http://bionomia.net/dataset/0159cf6b-6a46-4365-96f1-d7ca2511f082">https://bionomia.net/dataset/0159cf6b-6a46-4365-96f1-d7ca2511f082</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/0159cf6b-6a46-4365-96f1-d7ca2511f082">https://gbif.org/dataset/0159cf6b-6a46-4365-96f1-d7ca2511f082</a>. Formatted as a Frictionless Data package
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