215 citations · 1.6k across the 63 of their papers we have counts for
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VLBI Observations of a sample of Palomar-Green quasars II: characterising the parsec-scale radio emission
Ailing Wang, Tao An, Yingkang Zhang +4
This study uses multi-frequency Very Long Baseline Interferometry (VLBI) to study the radio emission from 10 radio-quiet quasars (RQQs) and four radio-loud quasars (RLQs). The dive…
Gravitational collapse and accretion flows in the hub filament system G323.46-0.08
Yingxiu Ma, Jianjun Zhou, Jarken Esimbek +9
We studied the hub filament system G323.46-0.08 based on archival molecular line data from the SEDIGISM 13CO survey and infrared data from the GLIMPSE, MIPS, and Hi-GAL surveys. G3…
The OH Megamaser Emission in Arp\,220: the rest of the story
W. A. Baan, J. N. H. S. Aditya, T. An +1
The OH Megamaser emission in the merging galaxy Arp220 has been re-observed with the Multi-Element Radio Linked Interferometer Network (MERLIN) and the European VLBI Network (EVN).…
Off-nuclear H2O maser and dense molecular gas in NGC1068
Yoshiaki Hagiwara, Willem A. Baan, Masatoshi Imanishi +1
The results of high-resolution spectral-line observations of dense molecular gas are presented towards the nuclear region of the type 2 Seyfert galaxy NGC1068. MERLIN observations…
Mildly Relativistic Motion in the Radio Quiet Quasar PG 1351+640
Ailing Wang, Tao An, Shaoguang Guo +8
Measuring the proper motion of the emission component in radio-quiet quasars (RQQs) could help to distinguish between the origins of the radio emission and to understand whether th…
HO MegaMaser emission in NGC 4258 indicative of a periodic disc instability
Wiillem A. Baan, Tao AN, Christian Henkel +3
HO MegaMaser emission may arise from thin gas discs surrounding the massive nuclei of galaxies such as NGC\,4258, but the physical conditions responsible for the amplified emis…
VLBI Observations of a sample of Palomar-Green quasars I: parsec-scale morphology
Ailing Wang, Tao An, Xiaopeng Cheng +5
We observed 20 Palomar-Green (PG) quasars at low redshift () with total flux density > 1 mJy, including 4 radio-loud quasars (RLQs) and 16 radio-quiet quasars (RQQs), using…
Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique I. Orion A
Mengke Zhao, Jianjun Zhou, Yue Hu +8
Magnetic fields play an important role in the evolution of molecular clouds and star formation. Using the Velocity Gradient Technique (VGT) model, we measured the magnetic field in…
LeMMINGs. III. The e-MERLIN Legacy Survey of the Palomar sample. Exploring the origin of nuclear radio emission in active and inactive galaxies through the [O III] -- radio connection
R. D. Baldi, D. R. A. Williams, R. J. Beswick +31
What determines the nuclear radio emission in local galaxies? We combine optical [O III] line emission, robust black hole (BH) mass estimates, and high-resolution e-MERLIN 1.5-GHz…
The obstructed jet in Mrk 231
Ailing Wang, Tao An, Sumit Jaiswal +5
Mrk~231 is the closest radio-quiet quasar known and one of the most luminous infrared galaxies in the local Universe. It is characterised by the co-existence of a radio jet and pow…
Studies of the distinct regions due to CO selective dissociation in the Aquila molecular cloud
Toktarkhan Komesh, Willem Baan, Jarken Esimbek +6
Aims. We investigate the role of selective dissociation in the process of star formation by comparing the physical parameters of protostellar-prestellar cores and the distinct regi…
LeMMINGs. II. The e-MERLIN legacy survey of nearby galaxies. The deepest radio view of the Palomar sample on parsec scale
R. D. Baldi, D. R. A. Williams, I. M. McHardy +30
We present the second data release of high-resolution ( arcsec) 1.5-GHz radio images of 177 nearby galaxies from the Palomar sample, observed with the e-MERLIN array, as p…
Effects of infall and outflow on massive star-forming regions
Qiang Li, Jianjun Zhou, Jarken Esimbek +8
A total of 188 high-mass outflows have been identified from a sample of 694 clumps from the Millimetre Astronomy Legacy Team 90 GHz survey, representing a detection rate of approxi…
Molecular environs and triggered star formation around the large Galactic infrared bubble N 24
Xu Li, Jarken Esimbek, Jianjun Zhou +10
A multi-wavelength analysis of the large Galactic infrared bubble N 24 is has been presented in this paper in order to investigate the molecular and star formation environment arou…
and Observations toward the Aquila Molecular Cloud
Toktarkhan Komesh, Jarken Esimbek, Willem Baan +7
The formaldehyde absorption line and H radio recombination line (RRL) have been observed toward the Aquila Molecular Cloud using the Nanshan 25 m…
High-mass outflows identified from COHRS CO\,(3 - 2) Survey
Qiang Li, Jianjun Zhou, Jarken Esimbek +6
An unbiased search of molecular outflows within the region of the COHRS survey has identified 157 high-mass outflows from a sample of 770 ATLASGAL clumps with a detection rate of 2…
Molecular line emission in NGC 4945, imaged with ALMA
C. Henkel, S. Muehle, G. Bendo +31
NGC 4945 is one of the nearest (~3.8 Mpc; 1" ~ 19 pc) starburst galaxies. ALMA band 3 (3--4\,mm) observations of HCN, HCO+, CS, C3H2, SiO, HCO, and CH3C2H were carried out with ~2"…
RadioAstron space-VLBI project: studies of masers in star forming regions of our Galaxy and megamasers in external galaxies
A. M. Sobolev, N. N. Shakhvorostova, A. V. Alakoz +1
Observations of the masers in the course of RadioAstron mission yielded detections of fringes for a number of sources in both water and hydroxyl maser transitions. Several sources…
H2O MegaMasers: a RadioAstron success story
Willem Baan, Alexey Alakoz, Tao An +8
The RadioAstron space-VLBI mission has successfully detected extragalactic H2O MegaMaser emission regions at very long Earth to space baselines ranging between 1.4 and 26.7 Earth D…
Gravitational lensing reveals extreme dust-obscured star formation in quasar host galaxies
H. R. Stacey, J. P. McKean, N. C. Robertson +8
We have observed 104 gravitationally-lensed quasars at with Herschel/SPIRE, the largest such sample ever studied. By targeting gravitational lenses, we probe intrinsic f…
The Emission Structure of Formaldehyde MegaMasers
Willem A. Baan, Tao An, Hans-Rainer Klöckner +1
The formaldehyde MegaMaser emission has been mapped for the three host galaxies IC\,860. IRAS\,151070724, and Arp\,220. Elongated emission components are found at the nuclear ce…
Properties of massive star-forming clumps with infall motions
Yu-Xin He, Jian-Jun Zhou, Jarken Esimbek +7
In this work, we aim to characterise high-mass clumps with infall motions. We selected 327 clumps from the Millimetre Astronomy Legacy Team 90-GHz (MALT90) survey, and identified 1…
Dense circum-nuclear molecular gas in starburst galaxies
Claire-Elise Green, Maria R. Cunningham, James A. Green +7
We present results from a study of the dense circum-nuclear molecular gas of starburst galaxies. The study aims to investigate the interplay between starbursts, active galactic nuc…
Infall Motions in Massive Star-Forming Regions: Results from Years 1 & 2 of the MALT90 Survey
Yu-Xin He, Jian-Jun Zhou, Jarken Esimbek +6
Massive star-forming regions with observed infall motions are good sites for studying the birth of massive stars. In this paper, 405 compact sources have been extracted from the AP…