Results 51 to 60 of about 71,111 (245)

Breaking the Disk/Halo Degeneracy with Gravitational Lensing [PDF]

, 1999
The degeneracy between the disk and the dark matter contribution to galaxy rotation curves remains an important uncertainty in our understanding of disk galaxies.
Andreas O. Jaunsen, Ariyeh H. Maller, Bottema R., de Vaucouleurs G., Hook R. N., Jackson N., Jaunsen A. O., Jens Hjorth, Joel R. Primack, Kormann R., Luc Simard, Munoz J. A., Puragra Guhathakurta, Ricardo A. Flores, Salucci P., Simard L., Tully R. B., Van Albada T. S., Wang Y.   +18 more
core   +4 more sources

Magnetic fields in spiral galaxies [PDF]

The Astronomy and Astrophysics Review, 1990
Published in A&ARev (2016) 24 ...
openaire   +5 more sources

Scaling Relations of Spiral Galaxies [PDF]

The Astrophysical Journal, 2007
We construct a large data set of global structural parameters for 1300 field and cluster spiral galaxies and explore the joint distribution of luminosity L, optical rotation velocity V, and disk size R at I- and 2MASS K-bands. The I- and K-band velocity-luminosity (VL) relations have log-slopes of 0.29 and 0.27, respectively with sigma_ln(VL)~0.13, and
Courteau, Stéphane, Dutton, Aaron A., van den Bosch, Frank C., MacArthur, Lauren A., Dekel, Avishai, McIntosh, Daniel H., Dale, Daniel A.   +6 more
openaire   +5 more sources

Dust Deficiency in the Interacting Galaxy NGC 3077

Galaxies, 2017
Using 70 μ m observations taken with the PACS instrument of the Herschel space telescope, the dust content of the nearby and interacting spiral galaxy NGC 3077 has been compared with the dust content of the isolated galaxies such as NGC 2841, NGC ...
Jairo Armijos-Abendaño, Ericson López, Mario Llerena, Franklin Aldás, Crispin Logan   +4 more
doaj   +1 more source

Discovery of a Nearby Low-Surface-Brightness Spiral Galaxy [PDF]

, 1998
During the course of a search for compact, isolated gas clouds moving with anomalous velocities in or near our own Galaxy (Braun and Burton 1998 A&A, in press), we have discovered, in the data of the Leiden/Dwingeloo survey (Hartmann and Burton 1997 ...
C. G. Hoopes, Grebel E. K., Guidoni U., Karachentseva V. E., Kraan-Korteweg R. C., Lynden-Bell D., Pannekoek A., R. A. M. Walterbos, R. Braun, Sharina M. E., W. B. Burton, Zwaan M. A.   +11 more
core   +2 more sources

A Dynamic Galaxy: Stellar Age Patterns across the Disk of M101

The Astrophysical Journal
Using deep, narrowband imaging of the nearby spiral galaxy M101, we present stellar age information across the full extent of the disk of M101. Our narrowband filters measure age-sensitive absorption features such as the Balmer lines and the slope of the
Ray Garner III, J. Christopher Mihos, Paul Harding, Charles R. Garner Jr.   +3 more
doaj   +1 more source

Mass extinction and the structure of the milky way [PDF]

Serbian Astronomical Journal, 2013
We use the most up-to-date Milky Way model and solar orbit data in order to test the hypothesis that the Sun's galactic spiral arm crossings cause mass extinction events on Earth. To do this, we created a new model of the Milky Way's spiral arms
Filipović M.D., Horner J., Crawford E.J., Tothill N.F.H., White G.L.   +4 more
doaj   +1 more source

ESO 603-G21: A strange polar-ring galaxy [PDF]

, 2001
We present the results of B, V, R surface photometry of ESO603-G21 - a galaxy with a possible polar ring. The morphological and photometric features of this galaxy are discussed.
de Oliveira-Abans, M., Faundez-Abans, M., Reshetnikov, V. P.   +2 more
core   +1 more source

Wireless Technologies for Wearable Electronics: A Review

Advanced Electronic Materials, EarlyView.
This review discusses recent advancements in wireless wearable electronics, focusing on communication technologies and power solutions. It covers key design considerations, explores wireless protocols from short‐ to long‐range networks, and examines powering methods such as integrated sources and energy harvesting.
Choong Yeon Kim, Juhyun Lee, Eun Young Jeong, Yeji Jang, Heesoo Kim, Bohyung Choi, Donggi Han, Youngjun Oh, Jae‐Woong Jeong   +8 more
wiley   +1 more source

A New Statistical Analysis of the Morphology of Spiral Galaxies

The Astronomical Journal
Morphology is the starting point for understanding galaxies. Elmegreen et al. classified spiral galaxies into flocculent, multiple-arm, and grand-design galaxies based on the regularity of their spiral arm structure.
Junye Wei, Ye Xu, Zehao Lin, Chaojie Hao, Yingjie Li, Dejian Liu, Shuaibo Bian   +6 more
doaj   +1 more source