Results 21 to 30 of about 2,088 (261)

Flat-spectrum Radio Continuum Emission Associated with ϵ Eridani [PDF]

The Astrophysical Journal, 2019
Abstract We present Very Large Array observations at 33.0 GHz that detect emission coincident with ϵ Eridani to within 0.″07 (0.2 au at the distance of this star), with a positional accuracy of 0.″05. This result strongly supports the suggestion of previous authors that the quiescent centimeter emission comes from the star and not from a
Luis F. Rodríguez, Susana Lizano, Laurent Loinard, Miguel Chávez-Dagostino, Timothy S. Bastian, Anthony J. Beasley   +5 more
openaire   +1 more source

Radio continuum emission from knots in the DG Tauri jet [PDF]

Astronomy & Astrophysics, 2012
Context: HH 158, the jet from the young star DG Tau, is one of the few sources of its type where jet knots have been detected at optical and X-ray wavelengths. Aims: To search, using Very Large Array observations of this source, radio knots and if detected, compare them with the optical and X-ray knots.
Raga, A., Gonzalez, R., Rodriguez, L., Loinard, L., Riera, A., Zapata, L., Canto, J., Dzib, S.   +7 more
openaire   +2 more sources

A global view on star formation: The GLOSTAR Galactic plane survey

Astronomy & Astrophysics
Context. Extended radio continuum emission and its linear polarization play a key role in probing large-scale structures of synchrotron and free-free emission in the Milky Way.
Gong Y., Reich W., Rugel M. R., Menten K. M., Brunthaler A., Wyrowski F., Müller P., Dzib S. A., Urquhart J. S., Yang A. Y., Dokara R., Ortiz-León G. N., Winkel B., Kraus A., Sathyanarayanan S. P., Kim W.-J., Beuther H., Pandian J. D., Cheema A., Khan S., Veena V. S., Roy N., Carrasco-Gonzalez C., Cotton W., Csengeri T., Medina S.-N. X., Nguyen H.   +26 more
doaj   +1 more source

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 CONTINUUM EMISSION AND WATER MASERS TOWARD CB 54 [PDF]

The Astronomical Journal, 2009
We present high angular resolution observations of water masers at 1.3 cm and radio continuum emission at 1.3, 3.6 and 6 cm towards the Bok globule CB 54 using the Very Large Array. At 1.3 cm, with subarsecond angular resolution, we detect a radio continuum compact source located to the south-west of the globule and spatially coincident with a mid ...
de Gregorio-Monsalvo, I., Gomez, J. F., Anglada, G., Torrelles, J. M., Kuiper, T. B. H., Suarez, O., Patel, N. A.   +6 more
openaire   +2 more sources

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

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

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

Effect of terahertz irradiation on DNA damage repair in living cells

FEBS Open Bio, EarlyView.
We investigated the effect of terahertz (THz) wave irradiation on DNA double‐strand break (DSB) repair in living cells. We found that THz irradiation enhanced DSB repair at specific frequencies, whereas heat treatment inhibited it, indicating that this effect is nonthermal and frequency‐specific.
Yuya Ueno, Shota Yamazaki, Hiromichi Hoshina, Masahiko Harata   +3 more
wiley   +1 more source