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We investigate the interstellar medium (ISM) towards seven TeV gamma-ray sources thought to be pulsar wind nebulae (PWNe) using Mopra molecular line observations at 7mm [CS(1-0), SiO(1-0,v=0)], Nanten CO(1-0) data and the SGPS/GASS HI…

High Energy Astrophysical Phenomena · Physics 2020-08-10 F. J. Voisin , G. P. Rowell , M. G. Burton , Y. Fukui , H. Sano , F. Aharonian , N. Maxted , C. Braiding , R. Blackwell , J. Lau

We report JWST MIRI/MRS observations of the H2 S(1) 17.04 micron transition in two regions in the boundary of the Taurus Molecular Cloud. The two regions, denoted Edge (near the relatively sharp boundary of the 13CO J=1-0 emission) and Peak…

Astrophysics of Galaxies · Physics 2025-04-30 Paul F. Goldsmith , Shengzhe Wang , Xin Wang , Raphael Skalidis , Gary A. Fuller , Di Li , Chao-Weo Tsai , Lile Wang , Donghui Quan

We present observations of continuum (lambda = 0.7, 1.3, 3.6 and 18 cm) and OH maser (lambda = 18 cm) emission toward the young planetary nebula IRAS 17347-3139, which is one of the three planetary nebulae that are known to harbor water…

We present here the results from an extensive scintillation study of twenty pulsars in the dispersion measure (DM) range 3 - 35 pc cm^-3 caried out using the Ooty Radio Telescope (ORT) at 327 MHz, to investigate the distribution of ionized…

Astrophysics · Physics 2009-10-30 N. D. Ramesh Bhat , Yashwant Gupta , A. Pramesh Rao

Interstellar scattering causes pulsar profiles to grow asymmetrically, thus affecting the pulsar timing residuals, and is strongest at lower frequencies. Different Interstellar medium models predict different frequency ($\nu$) and…

High Energy Astrophysical Phenomena · Physics 2019-05-01 Karishma Bansal , G. B. Taylor , Kevin Stovall , Jayce Dowell

Young circumstellar disks are of prime interest to understand the physical and chemical conditions under which planet formation takes place. Only very few detections of planet candidates within these disks exist, and most of them are…

Earth and Planetary Astrophysics · Physics 2018-09-12 M. Keppler , M. Benisty , A. Müller , Th. Henning , R. van Boekel , F. Cantalloube , C. Ginski , R. G. van Holstein , A. -L. Maire , A. Pohl , M. Samland , H. Avenhaus , J. -L. Baudino , A. Boccaletti , J. de Boer , M. Bonnefoy , G. Chauvin , S. Desidera , M. Langlois , C. Lazzoni , G. Marleau , C. Mordasini , N. Pawellek , T. Stolker , A. Vigan , A. Zurlo , T. Birnstiel , W. Brandner , M. Feldt , M. Flock , J. Girard , R. Gratton , J. Hagelberg , A. Isella , M. Janson , A. Juhasz , J. Kemmer , Q. Kral , A. -M. Lagrange , R. Launhardt , A. Matter , F. Ménard , J. Milli , P. Mollière , J. Olofsson , L. Perez , P. Pinilla , C. Pinte , S. P. Quanz , T. Schmidt , S. Udry , Z. Wahhaj , J. P. Williams , E. Buenzli , M. Cudel , C. Dominik , R. Galicher , M. Kasper , J. Lannier , D. Mesa , D. Mouillet , S. Peretti , C. Perrot , G. Salter , E. Sissa , F. Wildi , L. Abe , J. Antichi , J. -C. Augereau , A. Baruffolo , P. Baudoz , A. Bazzon , J. -L. Beuzit , P. Blanchard , S. S. Brems , T. Buey , V. De Caprio , M. Carbillet , M. Carle , E. Cascone , A. Cheetham , R. Claudi , A. Costille , A. Delboulbé , K. Dohlen , D. Fantinel , P. Feautrier , T. Fusco , E. Giro , D. Gisler , L. Gluck , C. Gry , N. Hubin , E. Hugot , M. Jaquet , D. Le Mignant , M. Llored , F. Madec , Y. Magnard , P. Martinez , D. Maurel , M. Meyer , O. Moeller-Nilsson , T. Moulin , L. Mugnier , A. Origne , A. Pavlov , D. Perret , C. Petit , J. Pragt , P. Puget , P. Rabou , J. Ramos , F. Rigal , S. Rochat , R. Roelfsema , G. Rousset , A. Roux , B. Salasnich , J. -F. Sauvage , A. Sevin , C. Soenke , E. Stadler , M. Suarez , M. Turatto , L. Weber

Diffuse interstellar bands (DIBs) hold a lot of information about the state and the structure of the ISM. Structure can most directly be observed by extensive spectroscopic surveys, including surveys of stars where DIBs are especially…

Astrophysics of Galaxies · Physics 2017-05-10 Janez Kos

The increasing detection of new molecules in the interstellar medium (ISM) shows that stereoisomerism is a fundamental contributor to interstellar molecular complexity. This work presents the first comprehensive overview of interstellar…

Astrophysics of Galaxies · Physics 2026-03-27 Víctor M. Rivilla , Miguel Sanz-Novo , David San Andrés

Narrow interstellar absorption features in supernova (SN) spectra serve as valuable diagnostics for probing dust extinction and the presence of circumstellar or interstellar material. In this third paper in a series, we investigate how the…

Astrophysics of Galaxies · Physics 2026-03-25 Claudia P. Gutiérrez , Santiago González-Gaitán , Joseph P. Anderson , Lluís Galbany

Spectra from the Keck HIRES instrument of the Lyman alpha forests in the lines of sight to the A and C components of the gravitationally lensed QSO Q1422+231 were used to investigate the structure of the intergalactic medium at mean…

Astrophysics · Physics 2009-11-06 Michael Rauch , Wallace L. W. Sargent , Thomas A. Barlow , Robert F. Carswell

We present 50 individual measurements of the gas temperature and turbulent velocity in the local interstellar medium (LISM) within 100 pc. By comparing the absorption line widths of many ions with different atomic masses, we can…

Astrophysics · Physics 2009-11-10 Seth Redfield , Jeffrey L. Linsky

This study aims to determine the main physical parameters (N(H2) hydrogen column density and Td dust temperature) of the Interstellar medium, and their distribution in the extended star-forming region, which includes IRAS 05156+3643,…

Astrophysics of Galaxies · Physics 2021-12-08 E. H. Nikoghosyan , N. M. Azatyan , D. H. Andreasyan , D. S. Baghdasaryan

As a complement to the HyGAL Stratospheric Observatory for Infrared Astronomy Legacy Program, we report the results of a ground-based absorption line survey of simple molecules in diffuse and translucent Galactic clouds. Using the Institut…

With new high-resolution CO and HI data, we revisited the large-scale interstellar medium (ISM) environment toward the SS 433/W50 system. We find that two interesting molecular cloud (MC) concentrations, G39.315-1.155 and G40.331-4.302, are…

Astrophysics of Galaxies · Physics 2019-01-08 Yang Su , Xin Zhou , Ji Yang , Yang Chen , Xuepeng Chen , Shaobo Zhang

The distribution of diffuse gas in the intergalactic medium (IGM) imprints a series of hydrogen absorption lines on the spectra of distant background quasars known as the Lyman-$\alpha$ forest. Cosmological hydrodynamical simulations…

Cosmology and Nongalactic Astrophysics · Physics 2017-05-31 Alberto Rorai , Joseph F. Hennawi , Jose Oñorbe , Martin White , J. Xavier Prochaska , Girish Kulkarni , Michael Walther , Zarija Lukić , Khee-Gan Lee

We present HST/GHRS echelle observations of multiple interstellar lines of CI, MgI, CrII, and ZnII towards both stars in the mu Cru binary system. Despite large differences in the profiles of the neutral species, no significant variations…

Astrophysics · Physics 2009-10-30 J. T. Lauroesch , David M. Meyer , John K. Watson , J. C. Blades

The mini-spiral is a feature of the interstellar medium in the central ~2 pc of the Galactic center. It is composed of several streamers of dust and ionised and atomic gas with temperatures between a few 100 K to 10^4 K. There is evidence…

Several different methods are regularly used to infer the properties of the neutral interstellar medium (ISM) using atomic hydrogen (H I) 21cm absorption and emission spectra. In this work, we study various techniques used for inferring ISM…

Astrophysics of Galaxies · Physics 2023-11-27 Soumyadeep Bhattacharjee , Nirupam Roy , Prateek Sharma , Amit Seta , Christoph Federrath

We aim at studying with high angular resolution a dense core associated with a low-luminosity IRAS source, IRAS 00213+6530, in order to investigate whether low mass star formation is really taking place in isolation. We performed…

Astrophysics of Galaxies · Physics 2015-05-13 G. Busquet , Aina Palau , R. Estalella , J. M. Girart , G. Anglada , I. Sepúlveda

Physical characterization of Trans-Neptunian objects, a primitive population of the outer solar system, may provide constraints on their formation and evolution. The goal of this work is to characterize a set of 15 scattered disk (SDOs) and…

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