Results 101 to 110 of about 77,751 (271)

The Star Formation Rate - Dense Gas Relation in the Nuclei of Nearby Galaxies

, 2008
We investigate the relationship between the star formation rate (SFR) and dense molecular gas mass in the nuclei of galaxies. To do this, we utilize the observed 850 micron luminosity as a proxy for the infrared luminosity and SFR, and correlate this ...
Bussmann, Chakrabarti, Desika Narayanan, Gao, Gao, Gao, Kelly, Krips, Krumholz, Lars Hernquist, Narayanan, Narayanan, Thomas J. Cox, Tran, Wu, Yao   +15 more
core   +1 more source

The First Triple Radio Active Galactic Nucleus in an Ongoing Galaxy Merger

The Astrophysical Journal Letters
Galaxy mergers are predicted to be a critical stage of merger-driven SMBH growth and galaxy evolution. Systems exhibiting multiple active galactic nuclei (AGN) are an important observational tool for constraining the prevalence and properties of merging ...
Emma Schwartzman, Ryan W. Pfeifle, Tracy E. Clarke, Kimberly A. Weaver, Nathan J. Secrest, Barry Rothberg, Miranda McCarthy, Daniel Stern, Peter G. Boorman, Joanna Piotrowska   +9 more
doaj   +1 more source

Kinematics of Nuclei of Sc Galaxies [PDF]

Highlights of Astronomy, 1980
For a sample of 21 Sc galaxies with a wide range of luminosities, of radii, and of masses, W. K. Ford and I have obtained spectra and determined rotation curves. By their kinematical behavior in their central regions, the Sc’s can be separated into two groups. Some galaxies, generally small and of low luminosity, have shallow central velocity gradients,
openaire   +1 more source

VLBI Observations of NGC6240: resolving the double nuclei and radio supernovae

, 2011
The European VLBI Network (EVN) has been used at two epochs in 2003 and 2009 to obtain multi-frequency high-resolution images of the merger galaxy NGC6240 in order to study the radio properties of all compact high-brightness components in the galaxy. Our
Baan, Bartel, Batejat, Bryant, Conway, Fried, Gallimore, Gallimore, Greenhill, Hagiwara, Hagiwara, Hans-Rainer Klöckner, Iono, Kameno, Komossa, Kovalev, Nakai, Nakanishi, Neff, Parra, Scoville, Smith, Tacconi, Thompson, Ulvestad, Willem A. Baan, Yoshiaki Hagiwara, Yun   +27 more
core   +1 more source

COMPTEL Observations of AGN at MeV-Energies [PDF]

, 1999
The COMPTEL experiment aboard CGRO, exploring the previously unknown sky at MeV-energies, has so far detected 10 Active Galactic Nuclei (AGN): 9 blazars and the radio galaxy Centaurus A. No Seyfert galaxy has been found yet.
Bennett, K., Bloemen, H., Blom, J. J., Collmar, W., Hermsen, W., Lichti, G. G., Ryan, J., Schoenfelder, V., Stacy, J. G., Steinle, H., Williams, O. R., Winkler, C.   +11 more
core   +2 more sources

Hubble Space Telescope Wide Field Camera 3 Identifies an $r_p$ = 1 Kpc Dual Active Galactic Nucleus in the Minor Galaxy Merger SDSS J0924+0510 at z = 0.1495

, 2018
Kiloparsec-scale dual active galactic nuclei (AGNs) are active supermassive black hole pairs co-rotating in galaxies with separations of less than a few kpc.
Greene, Jenny E., Guo, Hengxiao, Liu, Xin, Shen, Yue, Strauss, Michael A.   +4 more
core   +1 more source

Photodisintegration of cosmic ray nuclei in galaxies and galaxy cluster radiation fields [PDF]

, 2005
T. A. Porter, D. Allard
openalex   +1 more source

The complexity of parsec-scaled dusty tori in AGN

, 2012
Warm gas and dust surround the innermost regions of active galactic nuclei (AGN). They provide the material for accretion onto the super-massive black hole and they are held responsible for the orientation-dependent obscuration of the central engine. The
Burtscher L, G Weigelt, Greenhill L J, Grupe D, K Meisenheimer, K R W Tristram, L Burtscher, Levenson N A, M Kishimoto, M Schartmann, Oliva E, Packham C, Prieto M A, S F Hönig, Suganuma M, Tueller J, Veilleux S, W Jaffe, Wilson A S   +18 more
core   +1 more source

BASS. XLI. The Correlation between Mid-infrared Emission Lines and Active Galactic Nuclei Emission

The Astrophysical Journal
We analyze Spitzer spectra of 140 active galactic nuclei (AGN) detected in the hard X-rays (14–195 keV) by the Burst Alert Telescope on board Swift.
M. Bierschenk, C. Ricci, M. J. Temple, S. Satyapal, J. Cann, Y. Xie, Y. Diaz, K. Ichikawa, M. J. Koss, F. E. Bauer, A. Rojas, D. Kakkad, A. Tortosa, F. Ricci, R. Mushotzky, T. Kawamuro, K. K. Gupta, B. Trakhtenbrot, C. S. Chang, R. Riffel, K. Oh, F. Harrison, M. Powell, D. Stern, C. M. Urry   +24 more
doaj   +1 more source

The optical/near-infrared broad-line emission and hard X-ray continuum of active galactic nuclei and ultraluminous infrared galaxies [PDF]

, 1999
Masatoshi Imanishi, Shiro Ueno
openalex   +1 more source