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In the era of Chandra and XMM-Newton, the detection (or nondetection) of diffuse and/or point-like X-ray sources within planetary nebulae (PNe) yields important, unique insight into PN shaping processes. Diffuse X-ray sources, whether due…

Astrophysics · Physics 2007-09-27 Joel H. Kastner

(abridged) The Carina Nebula (NGC 3372) is our richest nearby laboratory in which to study feedback through UV radiation and stellar winds from very massive stars during the formation of an OB association before supernova explosions have…

Astrophysics · Physics 2009-11-11 Nathan Smith

We have analyzed observations with the Chandra X-ray Observatory of the diffuse emission by hot gas in 7 dwarf starburst galaxies, 6 edge-on starburst galaxies, and 9 Ultra Luminous Infrared Galaxies. These systems cover ranges of \~ 10^4…

Astrophysics · Physics 2009-11-10 J. P. Grimes , T. Heckman , D. Strickland , A. Ptak

We present a systematical analysis of the Chandra observations of 53 nearby highly-inclined (i>60 degree) disk galaxies to study the coronae around them. This sample covers a broad range of galaxy properties: e.g., about three orders of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Jiang-Tao Li , Q. Daniel Wang

We present wide-field, deep narrowband H$_2$, Br$\gamma$, H$\alpha$, [S II], [O III], and broadband I and K-band images of the Carina star formation region. The new images provide a large-scale overview of all the H$_2$ and Br$\gamma$…

Solar and Stellar Astrophysics · Physics 2015-06-23 P. Hartigan , M. Reiter , N. Smith , J. Bally

Chandra has performed a 1.4 Ms survey centred on the Hubble Deep Field-North (HDF-N), probing the X-ray Universe 55-550 times deeper than was possible with pre-Chandra missions. We describe the detected point and extended X-ray sources and…

Astrophysics · Physics 2009-11-07 W. N. Brandt , D. M. Alexander , F. E. Bauer , A. E. Hornschemeier

We present the catalog of X-ray sources detected in a shallow Chandra survey of the inner 2 by 0.8 degrees of the Galaxy, and in two deeper observations of the Radio Arches and Sgr B2. The catalog contains 1352 objects that are…

Astrophysics · Physics 2009-11-11 M. P. Muno , F. E. Bauer , R. M. Bandyopadhyay , Q. D. Wang

About 2 million seconds of Chandra observing time have been devoted to the Galactic center (GC), including large-scale surveys and deep pointings. These observations have led to the detection of about 4000 discrete X-ray sources and the…

Astrophysics · Physics 2009-11-11 Q. Daniel Wang

The Carina Nebula is one of the youngest, most active sites of massive star formation in our Galaxy. In this nebula, we have discovered a bright X-ray source that has persisted for ~30 years. The soft X-ray spectrum, consistent with kT ~128…

We report the most detailed $1-3$ GHz radio continuum emission map of the nearest region of massive star formation, the Carina Nebula. As part of a large program with the Australia Telescope Compact Array, we have covered $\sim$ 12 deg$^2$,…

Astrophysics of Galaxies · Physics 2021-03-17 David Rebolledo , Anne J. Green , Michael G. Burton , Shari L. Breen , Guido Garay

The central part of the massive star-forming region Cepheus A contains several radio sources which indicate multiple outflow phenomena, yet the driving sources of the individual outflows have not been identified. We present a…

Solar and Stellar Astrophysics · Physics 2015-05-14 P. C. Schneider , H. M. Guenther , J. H. M. M. Schmitt

We present X-ray spectral analysis of 20 point-like X-ray sources detected in Chandra Planetary Nebula Survey (ChanPlaNS) observations of 59 planetary nebulae (PNe) in the solar neighborhood. Most of these 20 detections are associated with…

The Chandra X-ray Observatory is a mainstay of modern observational astrophysics. With the highest angular resolution of any X-ray facility, its imaging and spectral capabilities in the 0.5-10 keV band have led to both unique and…

High Energy Astrophysical Phenomena · Physics 2025-10-31 Patrick Slane , Ákos Bogdán , David Pooley

We present new identifications of infrared counterparts to the population of hard X-ray sources near the Galactic center detected by the Chandra X-ray Observatory. We have confirmed 16 new massive stellar counterparts to the X-ray…

Astrophysics of Galaxies · Physics 2014-11-20 Jon C. Mauerhan , Michael P. Muno , Mark R. Morris , Susan R. Stolovy , Angela S. Cotera

When observed with sufficiently high spatial resolution and sensitivity, star formation regions are unusually complex X-ray sources. Low-mass protostars and T Tauri stars, Herbig Ae/Be stars, OB and Wolf-Rayet stars are seen at levels $28…

Astrophysics · Physics 2007-05-23 Eric D. Feigelson

Chandra is revolutionising our understanding of the X-ray emission from spiral galaxies. Before Chandra, detailed extragalactic studies were limited to Local Group galaxies. We are now able to obtain detailed inventories of sources in…

Astrophysics · Physics 2007-05-23 Andrea H Prestwich

We report the Fermi Large Area Telescope (Fermi-LAT) detection of the $\gamma$-ray emission toward the massive star forming region of Carina Nebula Complex (CNC). Using the latest source catalog and diffuse background models, we found that…

High Energy Astrophysical Phenomena · Physics 2022-10-26 Ting-Ting Ge , Xiao-Na Sun , Rui-Zhi Yang , Yun-Feng Liang , En-Wei Liang

The luminous unstable star (star system) eta Carinae is surrounded by an optically bright bipolar nebula, the Homunculus and a fainter but much larger nebula, the so-called outer ejecta. As images from the EINSTEIN and ROSAT satellites have…

Astrophysics · Physics 2009-11-10 Kerstin Weis , Michael F. Corcoran , Dominik J. Bomans , Kris Davidson

Within 40 years of the detection of the first extrasolar X-ray source in 1962,NASA's Chandra X-ray Observatory has achieved an increase in sensitivity of 10 orders of magnitude, comparable to the gain in going from naked-eye observations to…

High Energy Astrophysical Phenomena · Physics 2014-06-02 H Tananbaum , M C Weisskopf , W Tucker , B Wilkes , P Edmonds