... A Beautiful Trifid . ... A star forming region in the plane of our galaxy, the Trifid illustrates three different types of astronomical nebulae; red emission nebulae dominated by light emitted by hydrogen atoms, blue reflection nebulae produced by dust reflecting starlight, and dark nebulae where dense dust clouds appear in silhouette. ... Publications with keywords: M 20 - Trifid nebula - gas - dust - star formation . Publications with words: M 20 - Trifid nebula - gas - dust - star formation . ...

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• The Beautiful Trifid
• Астронет > A Beautiful Trifid

... 2005 May 26 . A Beautiful Trifid . ... A star forming region in the plane of our galaxy, the Trifid fittingly illustrates three basic types of astronomical nebulae; red emission nebulae dominated by light from hydrogen atoms, blue reflection nebulae produced by dust reflecting starlight, and dark absorption nebulae where dense dust clouds appear in silhouette. The bright red emission nebula, roughly separated into three parts by obscuring dust lanes, lends the Trifid its popular name. ...

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• APOD: 2009 May 30 - A Beautiful Trifid
• APOD: 2013 July 25 - The Beautiful Trifid
• APOD: 2011 May 13 - A Beautiful Trifid

... STScI-PRC98-11A STARING INTO THE WINDS OF DESTRUCTION: HST/NICMOS IMAGES OF THE PLANETARY NEBULA NGC 7027 The Hubble Space Telescope's Near Infrared Camera and Multi-Object Spectrometer (NICMOS) has captured a glimpse of a brief stage in the burnout of NGC 7027, a medium-mass star like our sun. ... The material settles into a wind of gas and dust blowing away from the dying star. ... During this phase, intense ultraviolet radiation from the central star lights up a region of gas surrounding it. ...

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• Arcetri Star-Formation Group Publications
• A collection of images

There is often dust associated with ionized regions. Compact HII regions usually have associated dust from a molecular cloud in which the massive star is being "born". ... For such stars the dust is not produced by the star, and a variety of dust features are observed. The planetary nebulae also usually have associated dust from the previous stage of evolution where they were either carbon stars or M-type giants. ... The feature near 11.5 microns in the IC 418 spectrum may be due to SiC dust. ...

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• WFPC2 Bright Star Avoidance Regions
• COS Instrument Handbook
• Superluminal Motion in the M87 Jet

... Tonight's Sky . ... Star Atlas . ... stars . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... An anarchic region of star formation captured . ... RELATED TOPICS: STARS . The star formation region NGC 6559. ... The Danish 1.54-meter telescope located at the European Southern Observatory (ESO) La Silla Observatory in Chile has captured a striking image of NGC 6559, an object that showcases the anarchy that reigns when stars form inside an interstellar cloud. ...

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• Is emission nebula NGC 6334 a mini starburst region? | Astronomy.com
• A dark patch in Orion star formation | Astronomy.com
• As stars form, magnetic fields influence regions big and small | Astronomy.com

... Australia Telescope Compact Array Radio Imaging of the Proplyd-like Objects in the Giant HII Region NGC 3603'' . M?cke, A., Koribalski, B.S. , Moffat, A.F.J., Corcoran, M.F., Stevens, I.R. 2002, ApJ 571, 366 . ... Brenneman, L., Corcoran, M.F., Moffat, A.F.J., Marchenko, S.V., Ptak, A., Skalkowski, G., Mushotzky, R., Stevens, I.R., Mueke, A., Koribalski, B.S. , et al. ... Physical Properties of visual counterparts to X-ray sources in the giant HII region NGC 3603'' . ...

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• LMC HII Region Luminosities versus Observed Ionizing Stars
• An investigation of the molecular clouds of the Carina HII region/molecular
• ATNF Colloquium

... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Planetary Nebulae and HII regions in the Elliptical Galaxy NGC 5128 . ... NGC 5128 is the closest example of a giant early type (elliptical or S0) galaxy. Although often dubbed as a peculiar elliptical galaxy since it has a dust lane with recent star formation and an active galactic nucleus, the majority of early type galaxies have similar structures as revealed by recent surveys. ...

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• The region of OrionтАЩs Belt and the Flame Nebula | ESO
• An Anarchic Region of Star Formation | ESO
• VISTA Reveals the Secret of the Unicorn | ESO

... Here some data observed on the 6m telescope with IFP installed in the OLD focal reducer are presented. ... Mkn 3: velocity field . ... NGC 5252: [OIII] image . ... NGC 5252 was observed 23 Feb. 1998 in the [OIII]5007 emission line with CCD TK1024 as detector. ... We observed the ionized gas velocity fields of the spiral galaxies with two purpose. ... Restored velocity field of NGC 157 in the reference frame rotating with the pattern speed overlaid on the Ha image of the galaxy . ... NGC 4100 . ...

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• My publications
• Publication Search

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions

... Meade Series 4000 Nebular Filters incorporate the very latest in interference coatings technology. ... Technical Basis of the Meade Broadband Nebular Filter: As shown in the transmission graph below, the Meade Broadband Nebular Filter strongly rejects the light of sodium- and mercury-vapor lights as well as natural airglow and auroral emissions. ... Meade Series 4000 Narrowband Nebular Filters . ... Meade Series 4000 Oxygen-III Nebular Filters . ... Meade Series 4000 Photo-Visual Color Filters . ...

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... This is combined emission from all the gas clouds circling the black hole, between 0.1 and 10 light years out. ... These are the expanding clouds of gas left behind when a massive star comes to the end of its life and explodes, producing a supernova. ... Also known as the Veil nebula, a vast and beautiful whispy nebula left over from an exploding star. ... The Crab Nebula (120kb). ... Carbon Star (120kb) Red giant stars, surrounded by clouds or carbon dust. ... 3500 K star (64kb) , like Aldebaran. ...

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• Towards a Truly Unified Model of AGN
• David Nicholls: CV and publications
• GSAOI Orion Nebula Cluster Science Page

Most current theories for magnetospheric emission can be grouped into polar cap, outer gap, and nebular models. These models, at least in some cases, need not be mutually exclusive; the Crab pulsar (among others), for example, shows clear evidence for pulsed emission from the magnetosphere and unpulsed emission from the surrounding nebula. ... This suggestion is strengthened by observation of a distinct soft emission component, consistent with the cooling scenario, from several of these pulsars. ...

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• A Region mask for a radial profile in concentric, elliptical annuli
• A box, to include extended emission
• The SAOimage Menu (options within SAOimage)

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... Purchase through the AstroShop . ... Publications of the ASP (PASP) . ... Astronomy Beat . ... Lighting the Nebulae . ... The interplay of light and atoms paints the beautiful palette of planetary nebulae. ... So come along on a trip to the inside of a planetary nebula and see what really happens as light and atoms violently interact to create some of the loveliest objects in the night sky. home | ... astroshop | ...

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• ASP: Accidental Astrophysics: The Devil's In the Magnitudes, Part II
• ASP: Big Clusters, Tiny Galaxies
• ASP: More About Deep Space Objects and Cosmic Terms

... Tadpole Emission Nebula and the Flaming Star Nebula . The constellation of Auriga harbors the cluster NGC 1893 which contains the Tadpole Nebula (IC 410). ... The Flaming Star Nebula, IC 405, is the magenta/purplish area and is the reflection portion of this nebulous region. 5nm Narrowband filters; H-alpha: O-III: S-II - 60: 60: 40 minutes x 600-second sub frames, Total= 2-hours 40-minutes, binned 1x1. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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... Aznar Cuadrado, R., Jeffery, C.S. , 2001, ``Physical parameters of sdB stars from spectral energy distributions'', A&A, 368, 994-1005. ... Banerjee, D., O'Shea, E., Doyle, J.G. , Goossens, M., 2001, ``The nature of network oscillations'', A&A, 371, 1137-1149. ... Chambers, J.E. , 2001, ``Comparing planetary accretion in two and three dimensions'', Icarus, 149, 262-276. ... Chambers, J.E. , 2001, ``Making more terrestrial planets'', Icarus, 152, 205-224. ...

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• Refereed Journal Publications 1999
• FETTU - Page 1
• Armagh Observatory

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Telescopes and Observatories . ... The majestic star-forming region in the Lagoon Nebula. The pale ring to the right is an internal reflection in the telescope.€а (Image credit: ESO/ VPHAS+/ V. Kalari and J. Vink (Armagh Observatory) . ... The 18 component images were further processed twice. ... Venu and his colleagues use images like this to identify individual young forming stars in the Lagoon Nebula and determine their ages. ...

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• Tarantula Nebula in stunning Hubble Image | Astronotes
• Galaxy NGC 6744: the Milky Way's Cosmic Twin? | Astronotes
• What is a nebula? | Astronotes

... 227Wink This paper containes an investigation of 91 sources which appear to be point sources when observed with the angular resolution of the 100-m telescope at 4.9 GHz, teta_a = 2.6', and which we expected to be HII regions. The basic search list was prepared from the 4.9 GHz survey of the galactic plane by Altenhoff et al. ... In the present paper we list 4.9 GHz flux densities only for sources for sources for which we present new observations. ... source structure indicated . ...

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• "Structure" publications in 2005 year
• The use of IRAS data to define H II regions
• Catalogue HII regions

... This program was created for correlating chosen regions in the series of fts images. ... Chosen regions' . ... In this section the program counts the integral for each region of the grid for each image. ... As a matter of fact, the integral is total brightness of the region and it is counted by 'int_tabulated' IDL function. ... In addition, the program will show the count of the regions which correlate with the corresponding region (the brighter region means the bigger count) and its contour. ...

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• Caving

I-GALFA View of a Galactic Tangent Region . ... Image featured in NAIC Newsletter #46 . I-GALFA image of hydrogen gas in a tangent region outside the Sagittarius arm. ... Because we are viewing this gas in a direction closely aligned with (tangent to) its orbital motion, it appears to be moving away from us (we are orbiting the Galactic center with a similar speed, but our own motion in a different direction). ... The gas near 60 degrees longitude is being viewed tangent to its orbital motion. ...

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• The Tarantula Nebula
• First Galfa H I Map
• The Pleiades

... region (region-7.9) [xmmsas_20060628_1801-7.0.0] . ... The basic source region shape is a circle. There are three ways to assign the radius, specified via the parameter radiusstyle : . radiusstyle =`userfixed'. ... In this choice, the task uses for the source region radius that value which encloses energyfraction of the total flux under the Point Spread Function (PSF). ... At present the effect of this reprojection on the source region contours is ignored and circles are retained. ...

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• Extraction and correction of an X-ray light curve for a point-like source
• Extraction of a X-ray light curve for a point-like source
• From 0 to <tt>Xspec</tt> in a few clicks