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We present a study of the molecular cloud in Sh2-112 massive star forming region using the 3-2 transition of CO isotopologues - CO, 13CO, and C18O; supplemented in part by CGPS HI line emission and MSX data. Sh2-112 is an optically visible…

Astrophysics of Galaxies · Physics 2023-04-26 Kshitiz Mallick , Saurabh Sharma , Lokesh Dewangan , Devendra Ojha , Neelam Panwar , Tapas Baug

We present the results from new Nobeyama Millimeter Array observations of CO(1-0), HCN(1-0), and 89-GHz continuum emissions toward NGC 604, known as the supergiant H ii region in a nearby galaxy M 33. Our high spatial resolution images of…

We present new data on the photodissociation regions associated with the reflection nebula NGC7023. 13CO(3-2) emission, delineates a molecular cloud containing a cavity largely devoid of molecular gas around this star. Neutral carbon is…

Astrophysics · Physics 2009-10-30 M. Gerin , T. G. Phillips , J. Keene , A. L. Betz , R. T. Boreiko

Three molecular clouds have been mapped in the nearby metal-poor dwarf irregular galaxy NGC 6822 using the Owens Valley Millimeter-Wave Interferometer. Based on upper limits to the virial masses of the clouds, the CO-to-H2 conversion factor…

Astrophysics · Physics 2009-10-22 C. D. Wilson

The link between the shaping of bipolar planetary nebulae and the mass ejection activity of their central stars is still poorly understood. Appropriately characterizing the evolution of the shells ejected during the late stages of evolution…

Solar and Stellar Astrophysics · Physics 2015-06-05 M. Santander-García , V. Bujarrabal , J. Alcolea

The three dimensional structure of the brightest part of the Orion Nebula is assessed in the light of published and new data. We find that the widely accepted model of a concave blister of ionized material needs to be altered in the…

Astrophysics · Physics 2009-11-13 C. R. O'Dell , W. J. Henney , N. P. Abel , G. J. Ferland , S. J. Arthur

The [CII] fine--structure line at 158um is an excellent tracer of the warm diffuse gas in the ISM and the interfaces between molecular clouds and their surrounding atomic and ionized envelopes. Here we present the initial results from…

This is the second paper of a series reporting the results from the PopStar evolutionary synthesis models. Here we present synthetic emission line spectra of H{\sc ii} regions photoionized by young star clusters, for seven values of cluster…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 M. L. Martín-Manjón , M. L. García-Vargas , M. Mollá , A. I. Díaz

We report the results of millimeter-wave molecular line observations of the Tornado Nebula (G357.7--0.1), which is a bright radio source behind the Galactic Center region. A 15'x15' area was mapped in the J=1--0 lines of CO, 13CO, and HCO+…

Astrophysics of Galaxies · Physics 2015-06-22 Daisuke Sakai , Tomoharu Oka , Kunihiko Tanaka , Shinji Matsumura , Kodai Miura , Shunya Takekawa

The BD+40\degree4124 region was observed with high angular and spectral resolution with the German heterodyne instrument GREAT in CO J = 13 \rightarrow 12 and [CII] on SOFIA. These observations show that the [CII] emission is very strong in…

NGC 6302 (The ''Butterfly Nebula'') is an extremely energetic bipolar nebula whose central star is among the most massive, hottest, and presumably rapidly evolving of all central stars of planetary nebulae. Our proper-motion study of NGC…

Solar and Stellar Astrophysics · Physics 2023-03-30 Bruce Balick , Lars Borchert , Joel H. Kastner , Adam Frank , Eric Blackman , Jason Nordhaus , Paula Moraga Baez

We observed Brackett $\alpha$ 4.05$\mu$m emission towards the supernebula in NGC 5253 with NIRSPEC on Keck II in adaptive optics mode, NIRSPAO, to probe feedback from its exciting embedded super star cluster (SSC). NIRSPEC's Slit-Viewing…

Astrophysics of Galaxies · Physics 2018-06-27 Daniel P. Cohen , Jean L. Turner , S. Michelle Consiglio , Emily C. Martin , Sara C. Beck

We analyze the distribution of the interstellar matter in the environs of the \hii region Gum 31, excited by the open cluster NGC 3324, located in the complex Carina region, with the aim of investigating the action of the massive stars on…

Astrophysics · Physics 2007-07-16 C. Cappa , V. S. Niemela , R. Amorin , J. Vasquez , ;

We investigate the star formation processes operating in a mid-infrared bubble N49 site, which harbors an O-type star in its interior, an ultracompact HII region, and a 6.7 GHz methanol maser at its edges. The 13CO line data reveal two…

Astrophysics of Galaxies · Physics 2017-12-27 L. K. Dewangan , D. K. Ojha , I. Zinchenko

We present spatially-resolved spectral of O II permitted lines and [O III] forbidden lines in the Ring Nebula NGC 6720. We find significant differences in the spatial distribution of the O II and [O III] lines. The [O III] emission follows…

Astrophysics · Physics 2009-11-06 D. R. Garnett , H. L. Dinerstein

Aims. To increase the observational samples of star formation around expanding Hii regions, we analyzed the interstellar medium and star formation around N22. Methods. We used data extracted from the seven large-scale surveys from infrared…

Astrophysics of Galaxies · Physics 2012-06-14 W. G. Ji , J. J. Zhou , J. Esimbek , Y. F. Wu , G. Wu , X. D. Tang

Revealing the 3D dynamics of HII regions and their associated molecular clouds is important for understanding the longstanding problem as to how stellar feedback affects the density structure and kinematics of the interstellar medium. We…

We present a study of the molecular gas and interstellar dust distribution in the environs of the HII region NGC 3503 associated with the open cluster Pis 17 with the aim of investigating the spatial distribution of the molecular gas linked…

Astrophysics of Galaxies · Physics 2015-06-03 N. U. Duronea , J. Vasquez , C. E. Cappa , M. Corti , E. M. Arnal

We report the first direct detection of molecular hydrogen associated with the Galactic nuclear wind. The Far-Ultraviolet Spectroscopic Explorer spectrum of LS 4825, a B1 Ib-II star at $l,b$ = 1.67$^{\circ}$,$-$6.63$^{\circ}$ lying $d$ =…

We report the detection of CO(J=2-1) coincident with the super star cluster (SSC) Mrk 71-A in the nearby Green Pea analog galaxy, NGC 2366. Our NOEMA observations reveal a compact, ~7 pc, molecular cloud whose mass (10^5 M_sun) is similar…

Astrophysics of Galaxies · Physics 2017-11-01 M. S. Oey , C. N. Herrera , Sergiy Silich , Megan Reiter , Bethan L. James , A. E. Jaskot , Genoveva Micheva
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