Joel Kastner

Structure and Evolution of Pre-Main Sequence Stars (2009)

Schulz, Norbert S., Allen, Glenn, Bautz, Mark W., Canizares, Claude C., Davis, John, Dewey, Dan, ...

Low-mass pre-main sequence (PMS) stars are strong and variable X-ray emitters, as has been well established by EINSTEIN and ROSAT observatories. It was originally believed that this emission was of...

Understanding Mass-Loss and the late Evolution of Intermediate Mass Stars: Jets, Disks, Binarity, Dust and Magnetic Fields (2009)

Sahai, Raghvendra, Balick, Bruce, Blackman, Eric, Kastner, Joel, Claussen, Mark, Morris, Mark, ...

Almost all stars in the 1-8 Msun range evolve through the Asymptotic Giant Branch (AGB), preplanetary nebula (PPN) and planetary nebula (PN) evolutionary phases. Most stars that leave the main...

Serendipitous XMM-Newton detection of x-ray emission from the bipolar planetary Nebula Hb 5 (2009)

Montez Jr., Rodolfo, Kastner, Joel, Balick, Bruce, Frank, Adam

Accepted for publication in The Astrophysical Journal. Also archived in: arXiv:0901.4095v1 [astro-ph.SR]

X-ray emission from planetary nebulae and their central stars: A Status report (2008)

Kastner, Joel

Paper to be published in the Proceedings of Asymmetrical Planetary Nebulae IV held on June 18 to 22, 2007, on La Palma in the Canary Islands (Spain).

Magnetic activity in Orion's massive young stars (2007)

Huenemoerder, David, Schulz, N., Testa, P., Kastner, Joel, Canizares, C.

In the heart if the Orion Nebula Cluster, one of the youngest and nearest star forming regions, is an ensemble of the youngest massive stars we know in the Galaxy. Having a dynamic age of about...

Serendipitous Chandra X-ray Detection of a Hot Bubble within the Planetary Nebula NGC 5315 (2007)

Kastner, Joel, Montez, Rodolfo, Balick, Bruce, De Marco, Orsola

We report the serendipitous detection of the planetary nebula NGC 5315 by the Chandra X-ray Observatory. The Chandra imaging spectroscopy results indicate that the X-rays from this PN, which harbors...

Spectral and temporal classification of x-ray sources in young stellar clusters (2007)

Hojnacki, Susan, Micela, G., Flaccomio, E., Kastner, Joel

Luminous, highly variable X-ray emission is one of the defining characteristics of low-mass, pre-main sequence (PMS) stars. A very wide range of temporal behavior has been observed in Chandra and...

Magnetic activity in Orion's very young massive stars (2007)

Schulz, Norbert S., Huenemoerder, D. P, Testa, P., Kastner, Joel, Canizares, C. R.

The heart of the Orion Nebula Cluster contains an ensemble of the youngest massive stars we know in the Galaxy. The Orion Trapezium is Cluster is one of the youngest and closest star forming regions...

X-ray spectral classification of sources in the Subaru XMM‑Newton Deep Survey (2007)

Mu, Bo, Kastner, Joel, Richmond, M. W., O'Dea, C. P., Kerekes, J.

We present preliminary results from the application of a new X-ray spectral clustering algorithm to a deep XMM-Newton image, obtained as part of the Subaru XMM-Newton Deep Survey (SXDS). We found...

X-rays from HH210 in the Orion nebula (2006)

Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Kastner, Joel, Bally, John, Mccaughrean, Mark

We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH210. HH210 is located at the tip of...

X-rays from HH210 in the Orion nebula (2006)

Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Kastner, Joel, Bally, John, Mccaughrean, Mark

We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH210. HH210 is located at the tip of...

X-rays from HH210 in the Orion nebula (2006)

Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Kastner, Joel, Bally, John, Mccaughrean, Mark

We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH210. HH210 is located at the tip of...

X-rays from HH210 in the Orion nebula (2006)

Grosso, Nicolas, Feigelson, Eric, Getman, Konstantin, Kastner, Joel, Bally, John, Mccaughrean, Mark

We report the detection during the Chandra Orion Ultradeep Project (COUP) of two soft, constant, and faint X-ray sources associated with the Herbig-Haro object HH210. HH210 is located at the tip of...

Chandra x-ray detection of a shocked polar jet in the symbiotic Mira System Hen 2-104 (2006)

Kastner, Joel, Sahai, R.

We report the detection by Chandra's Advanced CCD Imaging Spectrometer (ACIS) of X-ray emission from Hen 2-104, a D-type symbiotic Mira system that sits at the core of an hourglass-shaped bipolar...

Eruptive young stellar object in Ldn 1415 (2006)

Kastner, Joel, Richmond, M., Simon, T., Grosso, N., Weintraub, D., Hamaguchi, K.

J. Kastner and M. Richmond, Rochester Institute of Technology; T. Simon, Institute for Astronomy, Honolulu; N. Grosso, Laboratoire d'Astrophysique de Grenoble; D. Weintraub, Vanderbilt University;...

Spectral classification of sources in XMM-Newton X-ray observation of the rapidly accreting young star V1647 Ori (2006)

Mu, Bo, Kastner, Joel, Grosso, Nicolas

Paper from Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray held on 24 May 2006 at Orlando, FL, USA Copyright 2006 Society of Photo-Optical Instrumentation Engineers. One print or...

Spitzer IRS spectra of luminous 8 micron sources in the Large Magellanic Cloud (2005)

Buchanan, Catherine, Kastner, Joel, Forrest, William, Hrivnak, Bruce, Sahai, Raghvendra, Egan, Michael, ...

Also archived in: arXiv: astro-ph/0603443 v1 16 Mar 2006 Proceedings of "The Spitzer Science Center 2005 Conference: Infrared Diagnostics of Galaxy Evolution", held in Pasadena, November 14-16, 2005....

X-ray diagnostics of pre-main sequence accretion and outflow activity (2005)

Kastner, Joel

Star Formation in the Era of Three Great Observatories, meeting abstracts from the conference held July 13-15, 2005 in Cambridge, MA. http://cxc.harvard.edu/stars05/agenda/program.html, p.19

Exploring evidence for X-ray generation mechanisms in T Tauri stars (2005)

Shukla, S., Weintraub, D., Kastner, Joel

Pre main sequence stars emit X-rays, indicative of the presence of strong magnetic fields. The production of strong X-rays is thought to be related to magnetic reconnection events (MREs). The stimuli...

X-rays from the Mira AB binary system (2004)

Kastner, Joel, Soker, Noam

Also archived in: arXiv :astro-ph/0408329 v2 27 Aug 2004

X-rays from the Mira AB binary system (2004)

Kastner, Joel, Soker, Noam

Also archived in: arXiv :astro-ph/0408329 v2 27 Aug 2004

Stellar coronal spectroscopy with the Chandra HETGS (2004)

Huenemoerder, David, Boroson, Bram, Schulz, Norbert, Canizares, Claude, Buzasi, Derek, Preston, Heather, ...

Also archived in: arXiv: astro-ph/0310319 v1 11 Oct 2003 Published in: Stars as suns : activity, evolution and planets, Proceedings of the 219th symposium of the International Astronomical Union held...

The Egg Nebula (AFGL 2688): deepening enigma (2004)

Kastner, Joel, Soker, Noam

Also archived in: arXiv: astro-ph/0309677 v1 24 Sep 2003 Published in: Asymmetrical Planetary Nebulae III: Winds, Structure and the Thunderbird, Proceedings of the conference held 28 July - 1 August...

Automated x-ray spectral classification of young stellar sources detected in Chandra Orion Ultradeep Project observations (2004)

Hojnacki, Susan, Kastner, Joel, Micela, G., Feigelson, E. D., Grosso, N.

We are developing an automated classification technique to group X-ray sources detected in CCD imaging into clusters based on X-ray spectral attributes. The algorithm is non-parametric and uses...

A Compact X-ray source and possible X-ray jets within the planetary nebula Menzel 3 (2003)

Kastner, Joel, Balick, Bruce, Blackman, Eric, Frank, Adam, Soker, Noam, Vrtilek, Saeqa, ...

We report the discovery, by the Chandra X-ray Observatory, of X-ray emission from the bipolar planetary nebula Menzel 3. In Chandra CCD imaging, Mz 3 displays hot (~ 3 − 6 × 10,000,000 K) gas...

Refining Chandra/ACIS subpixel event repositioning using a backside illuminated CCD model (2003)

Li, Jingqiang, Kastner, Joel, Prigozhin, Gregory, Schulz, Norbert

Subpixel event repositioning (SER) techniques have been demonstrated to significantly improve the already unprecedented spatial resolution of Chandra X-ray imaging with the Advanced CCD Imaging...

The Egg Nebula (AFGL 2688): deepening enigma (2003)

Kastner, Joel, Soker, Noam

Recent observations of the Egg Nebula (AFGL 2688), obtained at ever-increasing spatial and spectral resolution, have revealed a perplexing array of phenomena. Many of these phenomena present...

The Egg Nebula (AFGL 2688): Deepening enigma (2003)

Kastner, Joel, Soker, Noam

Recent observations of the Egg Nebula (AFGL 2688), obtained at ever-increasing spatial and spectral resolution, have revealed a perplexing array of phenomena. Many of these phenomena present...

The Egg Nebula (AFGL 2688): deepening enigma (2003)

Kastner, Joel, Soker, Noam

Recent observations of the Egg Nebula (AFGL 2688), obtained at ever-increasing spatial and spectral resolution, have revealed a perplexing array of phenomena. Many of these phenomena present...

Magnetic flares on asymptotic giant branch stars (2003)

Soker, Noam, Kastner, Joel

Also archived in: arXiv: astro-ph/0209236 v2 6 Apr 2003

Magnetic flares on asymptotic giant branch stars (2003)

Soker, Noam, Kastner, Joel

Also archived in: arXiv: astro-ph/0209236 v2 6 Apr 2003