John Stauffer | Harvard University (original) (raw)
Papers by John Stauffer
AIP Conference Proceedings, 2009
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The Astrophysical Journal, Apr 5, 2009
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Bulletin of the American Astronomical Society, 2009
The nearby ( 600 pc) North America and Pelican nebulae are regions of high mass star-formation be... more The nearby ( 600 pc) North America and Pelican nebulae are regions of high mass star-formation beyond our local neighborhood and little-studied to date - however, both are well within the sensitivity regime provided by the Spitzer Space Telescope. We have conducted a large infrared imaging survey with Spitzer of these regions; our IRAC (3-8 microns) map covers 9 square
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The PTF Orion project is a part of the Palomar Transient Factory (PTF), a photometric survey for ... more The PTF Orion project is a part of the Palomar Transient Factory (PTF), a photometric survey for astronomical transients being undertaken with a dedicated wide-field CCD array installed on the Palomar 48" telescope. The camera consists of a 12-CCD array with a total nominal 7.8 square-degree field of view and 1-arcsecond pixels. The Orion project is based on intensive high-cadence
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ABSTRACT
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ABSTRACT
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ABSTRACT
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Much of our current knowledge regarding star-forming patterns and circumstellar disk evolution de... more Much of our current knowledge regarding star-forming patterns and circumstellar disk evolution derives from study of molecular cloud complexes within a few hundred parsecs of the Sun. Among this group are a large number of lower-mass clouds such as Taurus and, more infrequently, dense clouds like Orion, which is the prototypical high-mass and high density star forming region. These nearby
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In Fall 2009, we conducted a large, multi-wavelength time-series photometric monitoring campaign ... more In Fall 2009, we conducted a large, multi-wavelength time-series photometric monitoring campaign of about a one square degree region of the Orion Nebula cluster (ONC). From these data we identify nine stars in our field of view whose light curves show eclipse features. Four of these are the previously known ONC eclipsing binaries (EBs) and the other five systems are newly identified ONC PMS EB candidates - more than doubling what was known up to now. Here we present our follow-up observations and current work to confirm these candidates.
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Spitzer Proposal, Apr 1, 2009
Variability is almost a defining characteristic of young stellar objects (YSOs). We propose a pro... more Variability is almost a defining characteristic of young stellar objects (YSOs). We propose a program to monitor YSOs with IRAC channel 2 in staring mode for 3 sets of 8 hours. This proposal is complementary to our Exploration Science Spitzer program YSOVAR, which measures variability on timescales greater than 4 hours. With the proposed observations, we will probe disk accretion
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Astrophys J, 2008
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Recently, several major studies have published rotation rates of young, low-mass (T Tauri) stars ... more Recently, several major studies have published rotation rates of young, low-mass (T Tauri) stars in and around the Trapezium (Carpenter et al. 2001, Rebull 2001, Herbst et al. 2000, and Stassun et al. 1999). These combined efforts have produced periods for 715 stars of ~8000 stars monitored. We have combined data from the literature with new data to produce a multi-wavelength database (N-band through X-rays) for these stars. This poster discusses the new results we have obtained using this database, including relationships between stellar period, radius, specific angular momentum (j), disk properties, age, and mass.
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The Palomar Transient Factory (PTF) is a new survey for astronomical transients to be undertaken ... more The Palomar Transient Factory (PTF) is a new survey for astronomical transients to be undertaken with the wide-field CCD array recently installed on the Palomar 48" telescope. The camera consists of a 12-CCD array, each 2048 by 4096 pixels, giving a total nominal 7.8 square degree array with 1 arcsecond pixels. The Orion project is an experiment that during its
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Through existing studies of star-forming regions, Spitzer has created rich databases which have a... more Through existing studies of star-forming regions, Spitzer has created rich databases which have already profoundly influenced our ability to understand the star and planet formation process on micro and macro scales. However, it is essential to note that Spitzer observations to date have focused largely on deep observations of regions of recent star formation associated directly with well-known molecular clouds
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The PTF Orion project is a part of the Palomar Transient Factory (PTF), a survey for astronomical... more The PTF Orion project is a part of the Palomar Transient Factory (PTF), a survey for astronomical transients being undertaken with a dedicated wide-field CCD array installed on the Palomar 48" telescope. The Orion project is an experiment that during its first year is focusing on a single pointing in the Orion star-forming region. The project has been assigned 40
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The Palomar Transient Factory (PTF) is a new survey for astronomical transients being undertaken ... more The Palomar Transient Factory (PTF) is a new survey for astronomical transients being undertaken with the wide-field CCD array recently installed on the Palomar 48" telescope. The camera consists of a 12-CCD array, each 2048 by 4096 pixels, giving a total nominal 7.8 square degree array with 1 arcsec pixels. The Orion project is an experiment that during its first
Bookmarks Related papers MentionsView impact
The PTF Orion project is a part of the Palomar Transient Factory (PTF), a survey for astronomical... more The PTF Orion project is a part of the Palomar Transient Factory (PTF), a survey for astronomical transients being undertaken with a dedicated wide-field CCD array installed on the Palomar 48" telescope. The Orion project is an experiment that during its first year is focusing on a single pointing in the Orion star-forming region. The project has been assigned 40
Bookmarks Related papers MentionsView impact
The PTF Orion project is a part of the Palomar Transient Factory (PTF), a photometric survey for ... more The PTF Orion project is a part of the Palomar Transient Factory (PTF), a photometric survey for astronomical transients being undertaken with a dedicated wide-field CCD array installed on the Palomar 48" telescope. The camera consists of a 12-CCD array, each 2048 by 4096 pixels, giving a total nominal 7.8 square degree field of view with 1 arcsecond pixels. The
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AIP Conference Proceedings, 2009
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The Astrophysical Journal, Apr 5, 2009
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Bulletin of the American Astronomical Society, 2009
The nearby ( 600 pc) North America and Pelican nebulae are regions of high mass star-formation be... more The nearby ( 600 pc) North America and Pelican nebulae are regions of high mass star-formation beyond our local neighborhood and little-studied to date - however, both are well within the sensitivity regime provided by the Spitzer Space Telescope. We have conducted a large infrared imaging survey with Spitzer of these regions; our IRAC (3-8 microns) map covers 9 square
Bookmarks Related papers MentionsView impact
The PTF Orion project is a part of the Palomar Transient Factory (PTF), a photometric survey for ... more The PTF Orion project is a part of the Palomar Transient Factory (PTF), a photometric survey for astronomical transients being undertaken with a dedicated wide-field CCD array installed on the Palomar 48" telescope. The camera consists of a 12-CCD array with a total nominal 7.8 square-degree field of view and 1-arcsecond pixels. The Orion project is based on intensive high-cadence
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
ABSTRACT
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Much of our current knowledge regarding star-forming patterns and circumstellar disk evolution de... more Much of our current knowledge regarding star-forming patterns and circumstellar disk evolution derives from study of molecular cloud complexes within a few hundred parsecs of the Sun. Among this group are a large number of lower-mass clouds such as Taurus and, more infrequently, dense clouds like Orion, which is the prototypical high-mass and high density star forming region. These nearby
Bookmarks Related papers MentionsView impact
In Fall 2009, we conducted a large, multi-wavelength time-series photometric monitoring campaign ... more In Fall 2009, we conducted a large, multi-wavelength time-series photometric monitoring campaign of about a one square degree region of the Orion Nebula cluster (ONC). From these data we identify nine stars in our field of view whose light curves show eclipse features. Four of these are the previously known ONC eclipsing binaries (EBs) and the other five systems are newly identified ONC PMS EB candidates - more than doubling what was known up to now. Here we present our follow-up observations and current work to confirm these candidates.
Bookmarks Related papers MentionsView impact
Spitzer Proposal, Apr 1, 2009
Variability is almost a defining characteristic of young stellar objects (YSOs). We propose a pro... more Variability is almost a defining characteristic of young stellar objects (YSOs). We propose a program to monitor YSOs with IRAC channel 2 in staring mode for 3 sets of 8 hours. This proposal is complementary to our Exploration Science Spitzer program YSOVAR, which measures variability on timescales greater than 4 hours. With the proposed observations, we will probe disk accretion
Bookmarks Related papers MentionsView impact
Astrophys J, 2008
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Recently, several major studies have published rotation rates of young, low-mass (T Tauri) stars ... more Recently, several major studies have published rotation rates of young, low-mass (T Tauri) stars in and around the Trapezium (Carpenter et al. 2001, Rebull 2001, Herbst et al. 2000, and Stassun et al. 1999). These combined efforts have produced periods for 715 stars of ~8000 stars monitored. We have combined data from the literature with new data to produce a multi-wavelength database (N-band through X-rays) for these stars. This poster discusses the new results we have obtained using this database, including relationships between stellar period, radius, specific angular momentum (j), disk properties, age, and mass.
Bookmarks Related papers MentionsView impact
The Palomar Transient Factory (PTF) is a new survey for astronomical transients to be undertaken ... more The Palomar Transient Factory (PTF) is a new survey for astronomical transients to be undertaken with the wide-field CCD array recently installed on the Palomar 48" telescope. The camera consists of a 12-CCD array, each 2048 by 4096 pixels, giving a total nominal 7.8 square degree array with 1 arcsecond pixels. The Orion project is an experiment that during its
Bookmarks Related papers MentionsView impact
Through existing studies of star-forming regions, Spitzer has created rich databases which have a... more Through existing studies of star-forming regions, Spitzer has created rich databases which have already profoundly influenced our ability to understand the star and planet formation process on micro and macro scales. However, it is essential to note that Spitzer observations to date have focused largely on deep observations of regions of recent star formation associated directly with well-known molecular clouds
Bookmarks Related papers MentionsView impact
The PTF Orion project is a part of the Palomar Transient Factory (PTF), a survey for astronomical... more The PTF Orion project is a part of the Palomar Transient Factory (PTF), a survey for astronomical transients being undertaken with a dedicated wide-field CCD array installed on the Palomar 48" telescope. The Orion project is an experiment that during its first year is focusing on a single pointing in the Orion star-forming region. The project has been assigned 40
Bookmarks Related papers MentionsView impact
The Palomar Transient Factory (PTF) is a new survey for astronomical transients being undertaken ... more The Palomar Transient Factory (PTF) is a new survey for astronomical transients being undertaken with the wide-field CCD array recently installed on the Palomar 48" telescope. The camera consists of a 12-CCD array, each 2048 by 4096 pixels, giving a total nominal 7.8 square degree array with 1 arcsec pixels. The Orion project is an experiment that during its first
Bookmarks Related papers MentionsView impact
The PTF Orion project is a part of the Palomar Transient Factory (PTF), a survey for astronomical... more The PTF Orion project is a part of the Palomar Transient Factory (PTF), a survey for astronomical transients being undertaken with a dedicated wide-field CCD array installed on the Palomar 48" telescope. The Orion project is an experiment that during its first year is focusing on a single pointing in the Orion star-forming region. The project has been assigned 40
Bookmarks Related papers MentionsView impact
The PTF Orion project is a part of the Palomar Transient Factory (PTF), a photometric survey for ... more The PTF Orion project is a part of the Palomar Transient Factory (PTF), a photometric survey for astronomical transients being undertaken with a dedicated wide-field CCD array installed on the Palomar 48" telescope. The camera consists of a 12-CCD array, each 2048 by 4096 pixels, giving a total nominal 7.8 square degree field of view with 1 arcsecond pixels. The
Bookmarks Related papers MentionsView impact