Results 21 to 30 of about 22,088 (260)
CHOIRS H I GALAXY GROUPS: THE METALLICITY OF DWARF GALAXIES [PDF]
The Astrophysical Journal, 2014 We present a recalibration of the luminosity-metallicity relation for gas-rich, star-forming dwarfs to magnitudes as faint as M-R similar to -13. We use the Dopita et al. metallicity calibrations to calibrate the relation for all the data in this analysis.
Sweet, Sarah M. +6 more
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Highlights of Astronomy, 1977 I would like to report on some work that Ed Turner and I have done on groups of galaxies and how groups may be used to obtain useful cosmological information. Of course the classic study of groups of galaxies was done by de Vaucouleurs (1975) who made a catalogue of groups and loose associations of galaxies in the local supercluster. Partly to obtain a
openaire +1 more source
Isolated Galaxies, Pairs and Groups of Galaxies [PDF]
International Astronomical Union Colloquium, 1990 We searched for isolated galaxies, pairs and groups of galaxies in the CfA survey (Huchra et al. 1983). It was assumed that the distances to galaxies are given by R = V/H0, where H0 = 100 km s−1 Mpc−1 and R> 6 Mpc.
I. Kuneva, M. Kalinkov
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Galaxy Group Ellipticity Confirms a Younger Cosmos
UniverseWe present an analysis of the ellipticities of galaxy groups, derived from the spatial distribution of member galaxies, revealing a notable incongruity between the observed local galaxy groups and their counterparts in the Lambda cold dark matter ...
Yu Rong
doaj +1 more source
The PAndAS View of the Andromeda Satellite System. IV. Global Properties
The Astrophysical Journal, 2023 We build a statistical framework to infer the global properties of the satellite system of the Andromeda galaxy (M31) from the properties of individual dwarf galaxies located in the Pan-Andromeda Archaelogical Survey (PAndAS) and the previously ...
Amandine Doliva-Dolinsky +10 more
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The Astrophysical JournalWe present Chandra and XMM-Newton X-ray observations of the compact group HCG 57, and optical integral field spectroscopy of the interacting galaxy pair HCG 57A/D.
Ewan O’Sullivan +7 more
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Groups and Protocluster Candidates in the CLAUDS and HSC-SSP Joint Deep Surveys
The Astrophysical Journal, 2022 Using the extended halo-based group finder developed by Yang et al., which is able to deal with galaxies via spectroscopic and photometric redshifts simultaneously, we construct galaxy group and candidate protocluster catalogs in a wide redshift range (0
Qingyang Li +18 more
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Galaxy pairs in the Local Group [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2013 Abstract Current models of galaxy formation predict that galaxy pairs of comparable magnitudes should become increasingly rare with decreasing luminosity. This seems at odds with the relatively high frequency of pairings among dwarf galaxies in the Local Group. We use literature data to show that ∼30 per cent of all the satellites of the
Fattahi, Azadeh +4 more
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Advanced Materials Technologies, EarlyView.This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane +4 more
wiley +1 more source
Detection of a Spatially Extended Stellar Population in M33: A Shallow Stellar Halo?
The Astrophysical JournalWe analyze the outer regions of M33, beyond 15 kpc in projected distance from its center, using Subaru/Hyper Suprime-Cam multicolor imaging. We identify red giant branch (RGB) stars and red clump (RC) stars using the surface-gravity-sensitive NB515 ...
Itsuki Ogami +10 more
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