Results 51 to 60 of about 203 (158)

Time variations of stellar water masers [PDF]

Monthly Notices of the Royal Astronomical Society, 1979
The 22-GHz H2O spectra of the stars RS Vir, RT Vir, R Aql, W Hya, U Her, S Cr B, Rx Boo, R Crt and VY CMa have been observed at intervals during the period 1974 September–1977 May. Optical and infrared measurements have also been made. New components have been observed in the H2O spectra of most of the stars, and the flux density of W Hya reached 2000 ...
Graham G. Cox, E. A. Parker
openaire   +1 more source

Frequency Extensions of Auroral Kilometric Radiation: The Key to Unlocking Earth's Radio Response to Substorms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Auroral kilometric radiation (AKR) provides a sensitive probe of magnetospheric dynamics during substorms. We analyze an extended data set of AKR bursts observed by the WIND spacecraft to investigate how the frequency structure of AKR responds to substorm onset and evolution.
Simon James Walker, Caitríona M. Jackman, Alexandra R. Fogg, Siyuan Wu, James E. Waters   +4 more
wiley   +1 more source

Radio Continuum and Water Maser Observations of the High-mass Protostar IRAS 19035+0641 A

The Astrophysical Journal
We present Very Large Array 1.3 cm continuum and 22.2 GHz H _2 O maser observations of the high-mass protostellar object IRAS 19035+0641 A. Our observations unveil an elongated bipolar 1.3 cm continuum structure at scales ≲500 au, which, together with a ...
Tatiana M. Rodríguez, Emmanuel Momjian, Peter Hofner, Anuj P. Sarma, Esteban D. Araya   +4 more
doaj   +1 more source

Comparing image quality of synchrotron and laboratory nano‐CT scans: a round robin study

Journal of Synchrotron Radiation, Volume 33, Issue 2, Page 489-507, March 2026.
A multi‐facility round‐robin comparison of synchrotron‐ and laboratory‐based nano‐computed tomography using a standardized 3D phantom reveals superior resolution and acquisition speed at synchrotrons, while advanced laboratory systems achieve competitive image quality with extended scan times; phase contrast modalities further enhance structural ...
Simon Wittl, Simon Zabler, Jonas Fell, Julie Villanova, Pierre Lhuissier, Stefanie Hildebrandt, Hans-Georg Herrmann   +6 more
wiley   +1 more source

On the Structure of the Sagittarius Spiral Arm in the Inner Milky Way

The Astronomical Journal
We report measurements of trigonometric parallax and proper motion for two 6.7 GHz methanol and two 22 GHz water masers located in the far portion of the Sagittarius spiral arm as part of the BeSSeL Survey.
S. B. Bian, Y. W. Wu, Y. Xu, M. J. Reid, J. J. Li, B. Zhang, K. M. Menten, L. Moscadelli, A. Brunthaler   +8 more
doaj   +1 more source

Effects of Fruiting Neighborhood, Plant Traits, and Fruit Traits on Frugivore Visitation and Fruit Removal for an Understory Palm

Biotropica, Volume 58, Issue 2, March 2026.
We simultaneously evaluated how the fruiting neighborhood, defined as the number of fruiting palms in a 35 m radius, and relevant traits at the level of individual plants (e.g., height, crop size) and fruits (e.g., fruit and seed size, water, and sucrose content) influenced frugivore visitation and the number of fruits removed per visit in a common ...
Callie Rose Chenevert, Therese Lamperty, Domingo Cabrera, Jordan Karubian   +3 more
wiley   +1 more source

Radio Continuum and Water Maser Monitoring of the Outburst in HOPS 373: Free–Free Emission Does Not Respond to the Outburst

The Astronomical Journal
We present Very Large Array (VLA) C -band (5 cm) continuum, K -band (1.3 cm) continuum, and water maser (22.235 GHz) monitoring of the protostar HOPS 373. We additionally present the contemporaneous monitoring for 95 sources within the 5 cm field of view
John J. Tobin, Doug Johnstone, Gregory Herczeg, Jeong-Eun Lee, Ho-Gyu Lee, Carlos Contreras Peña, Sung-Yong Yoon, Steve Mairs   +7 more
doaj   +1 more source

A cloud collision model for water maser excitation

The Astrophysical Journal, 1986
High-velocity collisions between small, dense, neutral clouds or between a dense cloud and a dense shell can provide the energy source required to excite H2O maser emission. The radiative precursor from the surface of the collisional shock front rapidly diffuses through the cloud, heating the dust grains but leaving the H2 molecules cool.
J C, Tarter, W J, Welch
openaire   +2 more sources

Trans‐QTL Alliance of HKT1 and PHL7 Modulate Salinity Stress Tolerance and Enhance Crop Yield Endurance

Plant Biotechnology Journal, Volume 24, Issue 3, Page 1166-1188, March 2026.
ABSTRACT Salinity stress can cause significant yield losses in crops because of its major impact on reproductive success. The complexity of salinity stress responses, particularly their tissue‐ and cell‐specific regulation, continues to challenge the translation of molecular insights into tangible crop yield improvements.
Jitendra K. Mohanty, Antima Yadav, Laxmi Narnoliya, Virevol Thakro, Deepanshi Rathore, Shailesh Tripathi, Senjuti Sinharoy, Pinky Agarwal, Swarup K. Parida   +8 more
wiley   +1 more source

An Outflow-driven Water Maser Associated with Positive Black Hole Feedback in the Dwarf Galaxy Henize 2–10

The Astrophysical Journal
Henize 2–10 is a dwarf galaxy experiencing positive black hole (BH) feedback from a radio-detected low-luminosity active galactic nucleus. Previous Green Bank Telescope (GBT) observations detected a H _2 O “kilomaser” in Henize 2–10, but the low angular ...
Hansung B. Gim, Amy E. Reines, Emmanuel Momjian, Jeremy Darling   +3 more
doaj   +1 more source