Results 121 to 130 of about 13,046,567 (395)

A Nearby Isolated Dwarf: Star Formation and Structure of ESO 006–001

The Astrophysical Journal, 2023
Observations with the Hubble Space Telescope unexpectedly revealed that the dwarf galaxy ESO 006–001 is a near neighbor to the Local Group at a distance of 2.70 ± 0.11 Mpc.
Lidia N. Makarova, R. Brent Tully, Gagandeep S. Anand, Trystan S. Lambert, Margarita E. Sharina, Bärbel S. Koribalski, Renée C. Kraan-Korteweg   +6 more
doaj   +1 more source

Discovery of a giant HI tail in the galaxy group HCG 44 [PDF]

, 2012
We report the discovery of a giant HI tail in the intragroup medium of HCG 44 as part of the ATLAS3D survey. The tail is ˜ 300 kpc long in projection and contains ˜ 5 × 108 M⊙ of HI. We detect no diffuse stellar light at the location of the tail down to ˜
P. Serra, B. Koribalski, P. Duc, T. Oosterloo, R. McDermid, L. Michel-Dansac, E. Emsellem, J. Cuillandre, K. Alatalo, L. Blitz, M. Bois, F. Bournaud, M. Bureau, M. Cappellari, A. Crocker, R. Davies, T. Davis, P. Zeeuw, S. Khochfar, D. Krajnović, H. Kuntschner, P. Lablanche, R. Morganti, T. Naab, M. Sarzi, N. Scott, A. Weijmans, L. Young   +27 more
semanticscholar   +1 more source

Multitarget Recognition of Flower Images Based on Lightweight Deep Neural Network and Transfer Learning

Advanced Intelligent Systems, EarlyView.
This article proposes a lightweight YOLOv4‐based detection model using MobileNetV3 or CSPDarknet53_tiny, achieving 30+ FPS and higher mAP. It also presents a ShuffleNet‐based classification model with transfer learning and GAN‐augmented images, improving generalization and accuracy.
Qingyang Liu, Yanrong Hu, Hongjiu Liu
wiley   +1 more source

DISCRETE X-RAY SOURCES IN GALAXY CLUSTERS

Odessa Astronomical Publications, 2020
Current studies of extragalactic X-ray sources using data from orbital observatory XMM- Newton are at the front line of X-ray astronomy. Resolution capacity of the observatory instruments enable to detect separate X-ray sources in the close galaxies.
A. V. Tugay, L. V. Zadorozhna, S. Yu. Shevchenko   +2 more
doaj   +1 more source

The dependence of galaxy group star formation rates and metallicities on large‐scale environment [PDF]

, 2012
We construct a sample of 75,863 star forming galaxies with robust metallicity and star formation rate measurements from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7), from which we select a clean sample of compact group (CG) galaxies.
J. Scudder, S. Ellison, J. Mendel
semanticscholar   +1 more source

Discovery and Initial Investigation of a New Low Surface Brightness Planetary Nebula Candidate at High Galactic Latitude

Astronomische Nachrichten, EarlyView.
ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik, P. Köchling, S. Kotov, J. Kozok, Y. Galata, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch, K. Werner   +12 more
wiley   +1 more source

The origin of redshift asymmetries: How LambdaCDM explains anomalous redshift

, 2008
Several authors have found a statistically significant excess of galaxies with higher redshifts relative to the group centre, so-called discordant redshifts, in particular in groups where the brightest galaxy, identified in apparent magnitudes, is a ...
Arp, Arp, Bahcall, Berlind, Bottinelli, Botzler, Byrd, Croton, D'Onghia, Diaferio, Driver, Einasto, Eke, Eke, Focardi, Geller, Girardi, Goto, Goto, Hickson, Hickson, Hickson, Holmberg, Huchra, Humason, Iovino, Jaakkola, Jerjen, Jones, Karachentsev, Kim, Koester, Lucia, M. Valtonen, Mahdavi, Materne, Merchán, Moore, Niemi, Nolthenius, Ostriker, Ponman, Ramella, Ramella, Rekola, Rekola, S.-M. Niemi, Santos, Schechter, Shakhbazyan, Simien, Springel, Springel, Springel, Sulentic, Tago, Tago, Teerikorpi, Tucker, Tully, Turner, Valtonen, Yang, Zabludoff, Zaritsky   +64 more
core   +1 more source

The 2dF Galaxy Redshift Survey: the clustering of galaxy groups [PDF]

Monthly Notices of the Royal Astronomical Society, 2004
16 pages.
Padilla, Nelson D., Baugh, Carlton M., Eke, Vincent R., Norberg, Peder, Cole, Shaun, Frenk, Carlos S., Croton, Darren, Baldry, Ivan K., Bland-Hawthorn, Joss, Bridges, Terry, Cannon, Russell, Colless, Matthew, Collins, Chris, Couch, Warrick, Dalton, Gavin, De Propris, Roberto, Driver, Simon P., Efstathiou, George, Ellis, Richard S., Glazebrook, Karl, Jackson, Carole, Lahav, Ofer, Lewis, Ian, Lumsden, Stuart, Maddox, Steve, Madgwick, Darren, Peacock, John A., Peterson, Bruce A., Sutherland, Will, Taylor, Keith   +29 more
openaire   +7 more sources

Understanding Degradation Mechanisms in Water‐In‐Salt Electrolyte. Part 2: Impact of the Electrochemical Parameters on the Cycling Behavior of LiFePO4 versus TiS2

Batteries &Supercaps, EarlyView.
Cycling water‐in‐salt batteries involves complex degradation processes that require multiprobe analysis. Using online electrochemical mass spectrometry (OEMS), postmortem X‐ray photoemission spectroscopy (XPS) (including hard‐XPS), and scanning electron microscopy (SEM), the degradation mechanisms are examined in composite electrodes (TiS2 and LiFePO4)
Célia Doublet, Théo Faverge, Vincent Martin, Hiram Castillo Michel, Jean‐Pascal Rueff, Marian Chatenet, Lauréline Lecarme, Claire Villevieille   +7 more
wiley   +1 more source

The Draco Dwarf Spheroidal Galaxy in the First Year of Dark Energy Spectroscopic Instrument Data

The Astrophysical Journal
We investigate the spatial distribution, kinematics, and metallicity of stars in the Draco dwarf spheroidal galaxy using data from the Dark Energy Spectroscopic Instrument (DESI).
J. Ding, C. Rockosi, Ting S. Li, S. E. Koposov, A. H. Riley, W. Wang, A. P. Cooper, N. Kizhuprakkat, M. Lambert, G. E. Medina, N. Sandford, J. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, T. Claybaugh, A. de la Macorra, P. Doel, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, G. Gutierrez, J. Guy, M. Ishak, R. Kehoe, T. Kisner, A. Kremin, O. Lahav, M. Landriau, L. Le Guillou, A. Meisner, R. Miquel, J. Moustakas, F. Prada, I. Pérez-Ràfols, G. Rossi, E. Sanchez, M. Schubnell, J. Silber, D. Sprayberry, G. Tarlé, B. A. Weaver, R. Zhou   +42 more
doaj   +1 more source