Search Publications
Missions
Journals
Publication Years
Spectroscopic diagnostic of the footpoints of the cool loops
Dwivedi, B. N.; Kayshap, Pradeep; Jelínek, P. +2 more
Statistically, the cool loop's footpoints are diagnosed using Si IV resonance lines observations provided by Interface Region Imaging Spectrograph (IRIS). The intensity and full width at half-maximum (FWHM) of the loop's footpoints in β-γ active regions (ARs) are higher than the corresponding parameters of footpoints in β ARs. However, the Doppler…
Shock and Cosmic-Ray Chemistry Associated with the Supernova Remnant W28
Safi-Harb, Samar; Zhou, Ping; Chen, Yang +2 more
Supernova remnants (SNRs) exert a strong influence on the physics and chemistry of the nearby molecular clouds through shock waves and the cosmic rays (CRs) they accelerate. To investigate the SNR–cloud interaction in the prototype interacting SNR W28 (G6.4‑0.1), we present new observations of the HCO+, $\mathrm{HCN}$ , and HNC J = 1–0 …
A kinematic analysis of the giant molecular complex W3: Possible evidence for cloud-cloud collisions that triggered OB star clusters in W3 Main and W3(OH)
Bieging, John H.; Tachihara, Kengo; Fukui, Yasuo +6 more
W3 is one of the most outstanding regions of high-mass star formation in the outer solar circle, and includes two active star-forming clouds: W3 Main and W3(OH). Based on a new analysis of the
Evolution of the Local Spiral Structure Revealed by OB-type Stars in Gaia DR3
Hao, C. J.; Hou, L. G.; Lin, Z. H. +5 more
The structure and evolution of the spiral arms of the Milky Way have long been an important yet controversial issue. The wide age range of OB-type stars, coupled with the large amount of high-precision astrometric data provided by Gaia DR3, presents us with an opportunity to explore this issue. After constructing overdensity maps and examining the…
Nature of 4FGL J1838.2+3223: A flaring 'spider' pulsar candidate
Zharikov, S. V.; Karpova, A. V.; Gilfanov, M. R. +4 more
An unidentified γ-ray source 4FGL J1838.2+3223 has been proposed as a pulsar candidate. We present optical time-series multiband photometry of its likely optical companion obtained with the 2.1-m telescope of Observatorio Astronómico Nacional San Pedro Mártir, Mexico. The observations and the data from the Zwicky Transient Facility revealed the so…
Survey of complex organic molecules in starless and pre-stellar cores in the Perseus molecular cloud
Shirley, Yancy; Jiménez-Serra, Izaskun; Scibelli, Samantha +1 more
Cold (
Reconnection Inside a Dipolarization Front of a Diverging Earthward Fast Flow
Escoubet, C. P.; Fazakerley, A. N.; Le Contel, O. +18 more
We examine a Dipolarization Front (DF) event with an embedded electron diffusion region (EDR), observed by the Magnetospheric Multiscale (MMS) spacecraft on 08 September 2018 at 14:51:30 UT in the Earth's magnetotail by applying multi-scale multipoint analysis methods. In order to study the large-scale context of this DF, we use conjunction observ…
Eruption of a Million-Kelvin Warm Magnetic Flux Rope on the Sun
Peter, Hardi; Li, Leping; Chitta, Lakshmi Pradeep +4 more
Solar magnetic flux rope (MFR) plays a central role in the physics of coronal mass ejections (CMEs). It mainly includes a cold filament at typical chromospheric temperatures (∼10,000 K) and a hot channel at high coronal temperatures (∼10 MK). The warm MFR at quiescent coronal temperatures of a million Kelvin is, however, rarely reported. In this s…
On the Scarcity of Dense Cores (n > 105 cm‑3) in High-latitude Planck Galactic Cold Clumps
Sanhueza, Patricio; Ward-Thompson, Derek; Whitworth, Anthony +34 more
High-latitude (∣b∣ > 30°) molecular clouds have virial parameters that exceed 1, but whether these clouds can form stars has not been studied systematically. Using JCMT SCUBA-2 archival data, we surveyed 70 fields that target high-latitude Planck Galactic cold clumps (HLPCs) to find dense cores with density of 105–106 cm
The red giant branch tip in the SDSS, PS1, JWST, NGRST, and Euclid photometric systems: Calibration in optical passbands using Gaia DR3 synthetic photometry
Bellazzini, M.; Pascale, R.
We used synthetic photometry from Gaia DR3 BP and RP spectra for a large selected sample of stars in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) to derive the magnitude of the red giant branch (RGB) tip for these two galaxies in several passbands across a range of widely used optical photometric systems, including those of sp…