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Kinematics of the molecular clouds in the star forming complex M17 is studied using the high-resolution CO-line mapping data at resolution ($20" \sim 0.2$ pc) with the Nobeyama 45-m telescope. The northern molecular cloud of M17, which we…

Astrophysics of Galaxies · Physics 2021-11-03 Yoshiaki Sofue

We studied the environment of the dust bubble N10 in molecular emission. Infrared bubbles, first detected by the GLIMPSE survey at 8.0 $\mu$m, are ideal regions to investigate the effect of the expansion of the HII region on its…

Astrophysics of Galaxies · Physics 2016-10-18 D. R. G. Gama , J. R. D. Lepine , Y. Wu , J. Yuan , E. Mendoza

We present results from high resolution optical spectra toward 66 young stars in the Orion B molecular cloud to study their kinematics and other properties. Observations of the H$\alpha$ and Li I 6707 {\AA} lines are used to check…

Solar and Stellar Astrophysics · Physics 2017-08-09 Marina Kounkel , Lee Hartmann , Mario Mateo , John I. Bailey , III

The large H II complex N11 in the Large Magellanic Cloud contains OB associations at several different stages in their life histories. We have obtained ROSAT PSPC and HRI X-ray observations, Curtis Schmidt CCD images, echelle spectra in…

The southwestern (SW) part of the Galactic H II region M17 contains an obscured ionization front that is most easily seen at infrared and radio wavelengths. It is nearly edge-on, thus offering an excellent opportunity to study the way in…

(Abridged) In this second paper of the series, we present the results from optical Gemini-North GMOS-IFU and WIYN DensePak IFU spectroscopic observations of the starburst and inner wind zones of M82, with a focus on the state of the T~10^4…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 M. S. Westmoquette , J. S. Gallagher , L. J. Smith , G. Trancho , N. Bastian , I. S. Konstantopoulos

Aiming at studying the physical properties of Galactic IR bubbles and to explore their impact in triggering massive star formation, we perform a multiwavelength analysis of the bubble HII region Sh2-39 (N5) and its environs. To analyze the…

Astrophysics of Galaxies · Physics 2017-09-27 N. U. Duronea , C. E. Cappa , L. Bronfman , J. Borissova , M. Gromadzki

We present new results from our search for Giant H\,{\sc ii} Regions in galaxies visible from the southern hemisphere. In this work we study two galaxies: NGC\,7479 and NGC\,6070. Using high-resolution spectra, obtained with different…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 V. Firpo , G. Bosch , G. F. Hägele , N. Morrell

In the first few Myr the massive stars dynamically interact, produce runaways and affect the initial binary population. Observing and interpreting the dynamics of young massive clusters is key to our understanding of the star formation…

Astrophysics of Galaxies · Physics 2023-02-15 Mitchel Stoop , Lex Kaper , Alex de Koter , Difeng Guo , Henny J. G. L. M. Lamers , Steven Rieder

LDN 1615/1616 and CB 28 (hereafter, L1616) together form a cometary globule located at an angular distance of about 8 degrees west of the Orion OB1 association, aligned roughly along the east-west direction, and showing a distinct head-tail…

Astrophysics of Galaxies · Physics 2022-06-01 Piyali Saha , Archana Soam , Tapas Baug , Maheswar G. , Soumen Mondal , Tuhin Ghosh

We use 3D hydrodynamical models to investigate the effects of massive star feedback from winds and supernovae on inhomogeneous molecular material left over from the formation of a massive stellar cluster. We simulate the interaction of the…

Solar and Stellar Astrophysics · Physics 2015-06-15 H. Rogers , J. M. Pittard

With its cometary appearance and a reflection nebula near its edge facing some bright Orion stars, the Lynd's cloud L1616 shows ample evidence for being affected by one or more of these massive stars. To estimate its mass and star formation…

Astrophysics · Physics 2015-06-24 B. Ramesh

The central area (40"x40") of the bipolar nebula S106 was mapped in the OI line at 63.2 micron with high angular (6") and spectral resolution, using GREAT on board SOFIA. The OI emission distribution is compared to the CO 16-15, CII 158…

We report molecular line and continuum observations toward one of the most massive giant molecular clouds (GMCs), GMC-16, in M33 using ALMA with an angular resolution of 0$''$44 $\times$ 0$''$27 ($\sim$2 pc $\times$ 1 pc). We have found…

We present new spectroscopic observations of 13 H II regions in the Local Group spiral galaxy M33. The regions observed range from 1 to 7 kpc in distance from the nucleus. Of the 13 H II regions observed, the [O III] 4363 Angstrom line was…

Astrophysics · Physics 2009-11-13 N. R. Crockett , D. R. Garnett , P. Massey , G. Jacoby

We present the discovery of expanding spherical shells around low to intermediate-mass young stars in the Orion A giant molecular cloud using observations of $^{12}$CO (1-0) and $^{13}$CO (1-0) from the Nobeyama Radio Observatory 45-meter…

Formation mechanism of a supergiant H II region NGC 604 is discussed in terms of collision of H I clouds in M33. An analysis of the archival H I data obtained with the Very Large Array (VLA) reveals complex velocity distributions around NGC…

Astrophysics of Galaxies · Physics 2018-06-13 Kengo Tachihara , Pierre Gratier , Hidetoshi Sano , Kisetsu Tsuge , Rie E. Miura , Kazuyuki Muraoka , Yasuo Fukui

NGC 602 is a young, low-metallicity star cluster in the "Wing" of the Small Magellanic Cloud. We reveal the recent evolutionary past of the cluster through analysis of high-resolution ($\sim$0.4 pc) Atacama Large Millimeter/submillimeter…

Deep and wide-field optical photometric observations along with multiwavelength archival datasets have been employed to study the physical properties of the cluster NGC 6910. The study also examines the impact of massive stars to their…

Solar and Stellar Astrophysics · Physics 2020-06-17 Harmeen Kaur , Saurabh Sharma , Lokesh K. Dewangan , Devendra K. Ojha , Alok Durgapal , Neelam Panwar

M82 is an archetypal starburst galaxy in the local Universe. The central burst of star formation, thought to be triggered by M82's interaction with other members in the M81 group, is driving a multiphase galaxy-scale wind away from the…