Results 31 to 40 of about 84,001 (296)

An updated catalog of OH-maser-emitting planetary nebulae

, 2012
Aims. We studied the characteristics of planetary nebulae (PNe) that show both OH maser and radio continuum emission (hereafter OHPNe). These have been proposed to be very young PNe, and therefore, they could be key objects for understanding the ...
Gómez, J. F., Miranda, L. F., Suárez, O., Uscanga, L.   +3 more
core   +1 more source

Deep WFPC2 and Ground-based Imaging of a Complete Sample of 3C Quasars and Galaxies [PDF]

, 1997
We present the results of an HST and ground-based imaging study of a complete 3C sample of z ~ 1 sources, including 5 quasars and 5 radio galaxies. We have resolved continuum structure around all of our quasars in the WFPC2 images and in four of the five
Ridgway, Susan E., Stockton, Alan
core   +3 more sources

Nonthermal Radio Continuum Emission from Young Nearby Stars

The Astrophysical Journal, 2022
Abstract Young and magnetically active low-mass stars often exhibit nonthermal coronal radio emission owing to the gyration of electrons in their magnetized chromospheres. This emission is easily detectable at centimeter wavelengths with the current sensitivity of large radio interferometers like the Very Large Array (VLA).
Ralf Launhardt, Laurent Loinard, Sergio A. Dzib, Jan Forbrich, Geoffrey C. Bower, Thomas K. Henning, Amy J. Mioduszewski, Sabine Reffert   +7 more
openaire   +2 more sources

Radio Emission of Nearby Early-type Galaxies in the Low and Very Low Radio Luminosity Range

The Astrophysical Journal, 2023
We analyze radio continuum emission of early-type galaxies with dynamical measurements of central supermassive black hole (SMBH) masses and well-characterized large-scale environments, but regardless of the exact level of the nuclear activity.
Anna Wójtowicz, Łukasz Stawarz, C. C. Cheung, Norbert Werner, Dominik Rudka   +4 more
doaj   +1 more source

Detection of radio continuum emission from Procyon

The Astrophysical Journal, 1993
We have detected the F5 IV-V star Procyon as a weak and variable 3.6 cm radio continuum source using the VLA. The inferred radio luminosity is similar to, though some-what higher than, the X-band luminosity of the active and flaring sun. The 33 micro-Jy flux density level at which we detected Procyon on four of five occasions is close to the 36 micro ...
Stephen A. Drake, Theodore Simon, Alexander Brown   +2 more
openaire   +1 more source

Radio Continuum Emission and Optical Emission-Line Activity in the Nuclei of Spirals [PDF]

Symposium - International Astronomical Union, 1987
As a step towards the understanding of the phenomena occurring in galactic nuclei, we find that the ratio between the radio continuum emission of the nuclei of spiral galaxies and their optical luminosity is related to optical signs of nuclear activity, such as the emission line strengths of the H∝ and [NII] λ6584 lines.
G. Giuricin, F. Mardirossian, M. Mezzetti   +2 more
openaire   +1 more source

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source

Properties of active galactic star-forming regions probed by imaging spectroscopy with the Fourier transform spectrometer (FTS) onboard AKARI

, 2009
We investigate the structure of the interstellar medium (ISM) and identify the location of possible embedded excitation sources from far-infrared (FIR) line and mid-infrared continuum emission maps.
A. Yasuda, Afflerbach, Ando, Asplund, Balick, Becklin, Bock, Clayton, Clayton, Clegg, Colgan, Condon, Conti, D. Ishihara, Elmegreen, Emery, Felli, Fujiyoshi, Fujiyoshi, Fujiyoshi, Fujiyoshi, Goss, H. Kaneda, H. Kataza, H. Takahashi, Hanson, Hyland, Ishihara, Ishihara, Ishihara, Jiang, Kaufman, Kawada, Kawada, Kennicutt, Kessler, Lebouteiller, Lebouteiller, Lockman, M. Kawada, Martín-Hernández, Matsuhara, Mizutani, Mizutani, Moffat, Murakami, N. Murakami, Nürnberger, Nürnberger, Nürnberger, Oberst, Okada, Okada, Okada, Onaka, Peeters, Povich, Rodríguez-Fernández, Rubin, Simpson, Simpson, Stolte, Stutzki, T. Nakagawa, T. Onaka, T. Ootsubo, Ward, Werner, Wilson, Y. Okada   +69 more
core   +1 more source

An H2CO 6cm Maser Pinpointing a Possible Circumstellar Torus in IRAS18566+0408 [PDF]

, 2007
We report observations of 6cm, 3.6cm, 1.3cm, and 7mm radio continuum, conducted with the Very Large Array towards IRAS18566+0408, one of the few sources known to harbor H2CO 6cm maser emission. Our observations reveal that the emission is dominated by an
Boland W., Bronfman L., Carral P., E. Araya, E. Churchwell, Forster J. R., G. Garay, H. Linz, L. F. Rodriguez, L. Olmi, M. Sewiło, Molinari S., Ossenkopf V., P. Hofner, S. Kurtz, W. M. Goss   +15 more
core   +4 more sources

A multi-epoch study of radio continuum emission from massive protostars [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT We report the results of the Jansky Very Large Array (JVLA) observation of five massive protostars at 6 and 22.2 GHz. The aim of the study was to compare their current fluxes and positions with previous observations to search for evidence of variability.
Obonyo, WO, Lumsden, SL, Hoare, MG, Kurtz, SE, Purser, SJD   +4 more
openaire   +4 more sources