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We have conducted a study of star formation in the outer Galaxy from 65\degr$< l <$265\degr~in the region observed by the GLIMPSE360 program. This {\it Spitzer} warm mission program mapped the plane of the outer Milky Way with IRAC at 3.6…

Astrophysics of Galaxies · Physics 2020-07-22 Elaine Winston , Joseph Hora , Volker Tolls

Deep optical photometric data on the NGC 7538 region were collected and combined with archival data sets from $Chandra$, 2MASS and {\it Spitzer} surveys in order to generate a new catalog of young stellar objects (YSOs) including those not…

Solar and Stellar Astrophysics · Physics 2017-03-22 Saurabh Sharma , A. K. Pandey , D. K. Ojha , Himali Bhatt , K. Ogura , N. Kobayashi , R. Yadav , J. C. Pandey

We present a comprehensive physical and chemical study of the fragmentation and star formation activity towards the massive clump AGAL G338.9188+0.5494 harbouring the extended green object EGO 338.92+0.55(b). The presence of an EGO embedded…

Astrophysics of Galaxies · Physics 2023-09-20 M. E. Ortega , N. C. Martinez , S. Paron , A. Marinelli , N. L. Isequilla

The structure of the high galactic latitude Cometary Globule 12 (CG 12) has been investigated by means of radio molecular line observations. Detailed, high signal to noise ratio maps in C18O (1-0), C18O (2-1) and molecules tracing high…

Astrophysics · Physics 2009-11-11 L. K. Haikala , M. Olberg

We study the morphology of dark lanes and filaments in the dust-rich galaxy NGC 253 using an unsharp-masked $B$-band optical photograph. Dust features are classified as `arcs', which have heights and scale radius of about 100 to 300 pc,…

Astrophysics · Physics 2009-10-22 Yoshiaki Sofue , Ken-ichi Wakamatsu , David F. Malin

(abridged) We have analyzed the properties of the rest-frame optical emission lines of a sample of 53 intensely star forming galaxies at z=1.3 to 2.7 observed with SINFONI on the ESO-VLT. We find large velocity dispersions in the lines,…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 M. D. Lehnert , L. Le Tiran , N. P. H. Nesvadba , W. van Driel , F. Boulanger , P. Di Matteo

We present molecular line and dust continuum observations of a Planck-detected cold cloud, G074.11+00.11. The cloud consists of a system of curved filaments and a central star-forming clump. The clump is associated with several infrared…

Though S0 galaxies are usually thought to be `red and dead', they demonstrate often star formation organized in ring structures. We try to clarify the nature of this phenomenon and its difference from star formation in spiral galaxies. The…

Astrophysics of Galaxies · Physics 2020-02-19 I. Proshina , O. Sil'chenko , A. Moiseev

We present results of long-slit and panoramic spectroscopy of extended gaseous disks in 18 nearby S0 galaxies, mostly in groups. The gas in our S0s is found to be often accreted from outside that is implied by its decoupled kinematics: at…

Astrophysics of Galaxies · Physics 2019-09-11 Olga K. Sil'chenko , Alexei V. Moiseev , Oleg V. Egorov

The ALMA-IMF Large Program provides multi-tracer observations of 15 Galactic massive protoclusters at matched sensitivity and spatial resolution. We focus on the dense gas kinematics of the G353.41 protocluster traced by N$_2$H$^+$ (1$-$0),…

A few years ago, we investigated MYSO G29.862-0.0044 (YSO-G29), an intriguing star-forming region at a distance of 6.2 kpc. Although the typical disc-jet scenario was proposed to explain the observations, it remained far from conclusive.…

Astrophysics of Galaxies · Physics 2025-10-01 S. Paron , N. C. Martinez , M. E. Ortega , D. Mast , A. Petriella , L. Supán , C. Fariña

We map the extraplanar gas, with $\sim$50-200 pc resolution, in nine star-forming galaxies using Multi-Unit Spectroscopic Explorer (MUSE) observations from the GECKOS VLT Large Program targeting edge-on galaxies with similar stellar mass as…

We present a multi-scale and multi-wavelength study to investigate the star formation process around IRAS 17599$-$2148 that is part of an elongated filamentary structure (EFS) (extension $\sim$21 pc) seen in the {\it Herschel} maps. Using…

Astrophysics of Galaxies · Physics 2016-12-28 L. K. Dewangan , D. K. Ojha , I. Zinchenko , P. Janardhan , S. K. Ghosh , A. Luna

Young massive stars warm up the large amount of gas and dust which condenses in their vicinity, exciting a forest of lines from different molecular species. Their line brightness is a diagnostic tool of the gas physical conditions locally,…

Astrophysics of Galaxies · Physics 2021-11-24 A. Sanna , A. Giannetti , M. Bonfand , L. Moscadelli , R. Kuiper , J. Brand , R. Cesaroni , A. Caratti o Garatti , T. Pillai , K. M. Menten

Since most high- and intermediate-mass protostars are at great distance and form in clusters, high linear resolution observations are needed to investigate their physical properties. To study the gas in the innermost region around the…

Astrophysics · Physics 2009-11-13 S. Leurini , H. Beuther , P. Schilke , F. Wyrowski , Q. Zhang , K. M. Menten

We report the discovery of a debris system associated with the $\sim 30$ Myr old G3/5V star HD 12039 using {\it Spitzer Space Telescope} observations from 3.6 -- 160$\mu$m. An observed infrared excess (L$_{\rm IR}$/L$_{\ast} =…

SMA observations of the massive star-forming region IRAS 18089-1732 in the 1mm and 850mu band reveal outflow and disk signatures in different molecular lines. The SiO(5--4) data show a collimated outflow in the northern direction. In…

We studied the distribution of dense gas in a filamentary molecular cloud containing several dense clumps. The center of the filament is given by the dense clump WB673. The clumps are high-mass and intermediate-mass star-forming regions. We…

Astrophysics of Galaxies · Physics 2017-12-22 M. S. Kirsanova , S. V. Salii , A. M. Sobolev , A. O. H. Olofsson , D. A. Ladeyschikov , M. Thomasson

We present high angular resolution Submillimeter Array (SMA) and Karl G. Jansky Very Large Array (VLA) observations of the massive protocluster G18.67+0.03. Previously targeted in maser surveys of GLIMPSE Extended Green Objects (EGOs), this…

Astrophysics of Galaxies · Physics 2015-06-11 C. J. Cyganowski , C. L. Brogan , T. R. Hunter , Q. Zhang , R. K. Friesen , R. Indebetouw , C. J. Chandler

We analyze the physical parameters of interstellar filaments that we describe by an idealized model of isothermal self-gravitating infinite cylinder in pressure equilibrium with the ambient medium. Their gravitational state is characterized…

Astrophysics of Galaxies · Physics 2015-06-04 Joerg Fischera , Peter G. Martin
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