Results 51 to 60 of about 1,969,695 (207)
Astronomische Nachrichten, Volume 346, Issue 9, November 2025.ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin +10 more
wiley +1 more source
Near-infrared Integral-field Spectroscopy of the Wind Forming Region of CW Leo
The Astronomical JournalThe circumstellar envelope of the carbon star CW Leo exhibited various unexpected changes in recent optical imaging observations. We have performed a follow-up observation using the Near-infrared Integral-Field Spectrograph (NIFS) equipped on the Gemini ...
Hyosun Kim +3 more
doaj +1 more source
Clusters Stagnating During Condensation: Metastable Material or a Separate State of Matter?
Annalen der Physik, Volume 537, Issue 10, October 2025.Condensation stagnation, that is, the existence of a delay between nucleation and growth during the gas‐phase particle formation, is a crucial phenomenon, which manifests itself as the presence of supercritical clusters in resulting particulates. The light emission signature of stagnant clusters is identified in the magnesium particle flame in air, and,
Nicholas R. Jaramillo +4 more
wiley +1 more source
Model for the circumstellar gas around alpha Orionis
The Astrophysical Journal, 1981 Models are presented to explain the physical conditions in the circumstellar envelope surrounding the red supergiant Alpha Orionis. The models of the CO density and neutral atomic potassium density are calculated for the outer shell to reproduce simultaneously both the radio detection of CO and optical measurements of the amount of scattering by ...
M. Jura, M. Morris
openaire +1 more source
Generation of a circumstellar gas disc by hot Jupiter WASP-12b [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Observations of transiting extra-solar planets provide rich sources of data for probing the in-system environment. In the WASP-12 system, a broad depression in the usually-bright MgII h&k lines has been observed, in addition to atmospheric escape from the extremely hot Jupiter WASP-12b.
Alex Debrecht +5 more
openaire +2 more sources
Is Phenylnitrene a Missing Link in the Formation of Polycyclic Aromatic Nitrogen Heterocycles?
Angewandte Chemie International Edition, Volume 64, Issue 31, July 28, 2025.A new formation pathway for polycyclic aromatic nitrogen heterocycles (PANHs) has been found. The reaction of phenylnitrene and the propargyl radical leads to quinoline, proving that nitrenes are suitable precursors for nitrogen incorporation mechanisms.
Rahel Arns +6 more
wiley +1 more source
The structure of the circumstellar gas of SN 1987A
, 1997 14 pages including 7 Postscript figures, paspconf.sty; To appear in proceedings ``SN 1987A: Ten Years After'' (eds. M. Phillips & N. Suntzeff)
Lundqvist, Peter, Sonneborn, George
openaire +2 more sources
The Circumstellar Disk HD 169142: Gas, Dust, and Planets Acting in Concert?* [PDF]
The Astrophysical Journal, 2017 Abstract HD 169142 is an excellent target for investigating signs of planet–disk interaction due to previous evidence of gap structures. We perform J-band (∼1.2 μm) polarized intensity imaging of HD 169142 with VLT/SPHERE. We observe polarized scattered light down to 0.″16 (∼19 au) and find an inner gap with a significantly reduced ...
Pohl, A. +36 more
openaire +8 more sources
ChemPhysChem, Volume 26, Issue 2, January 14, 2025.The structure of diphenylsilane could be determined from the rotational spectra of all its singly substituted heavy atom isotopologues. A comparison with its oxygen analogue diphenylether revealed some interesting differences in the internal dynamics as well as in the gas‐phase structure.
Gayatri Batra, Melanie Schnell
wiley +1 more source
Development of natural gas reburning for control of NO sub x from municipal waste combustors [PDF]
, 1991 The Gas Research Institute (GRI) and the Institute of Gas Technology (IGT), in cooperation with Riley Stoker Corporation (Riley), USA, and Takuma Company Ltd.
Abbasi, H. +2 more
core