John Stauffer | Harvard University (original) (raw)

Papers by John Stauffer

Research paper thumbnail of Stellar Age Estimation from 3 Myr to 3 Gyr

AIP Conference Proceedings, 2009

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Research paper thumbnail of New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope

The Astrophysical Journal, Apr 5, 2009

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Research paper thumbnail of MIPS Observations of the North American and Pelican Nebulae

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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Research paper thumbnail of Young Low-Mass Companion Candidates from the PTF Orion Planet Search Project

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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Research paper thumbnail of WIYN Open Cluster Study: Lithium in M35 Open Cluster (CD-ROM Directory: contribs/barrado1)

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Research paper thumbnail of WIYN Open Cluster Study: Lithium in the Pleiades, A New Look

ABSTRACT

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Research paper thumbnail of WIYN Open Cluster Study: A New Look at the Pleiades Lithium Problem

ABSTRACT

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Research paper thumbnail of IRAC and MIPS Observations of the North American and Pelican Nebulae

ABSTRACT

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Research paper thumbnail of Chromospheric Activity at Intermediate Ages

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Research paper thumbnail of The PMS Disk Population of the North America and Pelican nebulae

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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Research paper thumbnail of New Data for Five New Orion PMS Eclipsing Binaries from the Spitzer YSOVAR Program

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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Research paper thumbnail of Measuring YSO inner accretion disk sizes, structure and dynamics with staring mode observations of 14 YSOs in Rho Ophiuchus

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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Research paper thumbnail of Spitzer MIPS Observations of Stars in the � Pictoris Moving Group

Astrophys J, 2008

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Research paper thumbnail of Rotational Evolution of Young Low-Mass Stars in the Orion Nebula Cluster

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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Research paper thumbnail of The PTF Orion Planet-Search Project

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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Research paper thumbnail of Star Formation: Answering Fundamental Questions During the Spitzer Warm Mission Phase

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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Research paper thumbnail of The PTF Orion Planet-Search: Preliminary Results from the First Data Set

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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Research paper thumbnail of Preliminary Results from the PTF Orion Planet-Search Program

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

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Research paper thumbnail of The PTF Orion Planet-Search: Early Results from the First Data Set

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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Research paper thumbnail of Results from the PTF Orion Planet Search Program

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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Research paper thumbnail of Stellar Age Estimation from 3 Myr to 3 Gyr

AIP Conference Proceedings, 2009

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Research paper thumbnail of New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope

The Astrophysical Journal, Apr 5, 2009

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Research paper thumbnail of MIPS Observations of the North American and Pelican Nebulae

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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Research paper thumbnail of Young Low-Mass Companion Candidates from the PTF Orion Planet Search Project

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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Research paper thumbnail of WIYN Open Cluster Study: Lithium in M35 Open Cluster (CD-ROM Directory: contribs/barrado1)

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Research paper thumbnail of WIYN Open Cluster Study: Lithium in the Pleiades, A New Look

ABSTRACT

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Research paper thumbnail of WIYN Open Cluster Study: A New Look at the Pleiades Lithium Problem

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of IRAC and MIPS Observations of the North American and Pelican Nebulae

ABSTRACT

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Research paper thumbnail of Chromospheric Activity at Intermediate Ages

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Research paper thumbnail of The PMS Disk Population of the North America and Pelican nebulae

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

Research paper thumbnail of New Data for Five New Orion PMS Eclipsing Binaries from the Spitzer YSOVAR Program

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

Research paper thumbnail of Measuring YSO inner accretion disk sizes, structure and dynamics with staring mode observations of 14 YSOs in Rho Ophiuchus

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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Research paper thumbnail of Spitzer MIPS Observations of Stars in the � Pictoris Moving Group

Astrophys J, 2008

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Research paper thumbnail of Rotational Evolution of Young Low-Mass Stars in the Orion Nebula Cluster

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

Research paper thumbnail of The PTF Orion Planet-Search Project

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

Research paper thumbnail of Star Formation: Answering Fundamental Questions During the Spitzer Warm Mission Phase

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

Research paper thumbnail of The PTF Orion Planet-Search: Preliminary Results from the First Data Set

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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Research paper thumbnail of Preliminary Results from the PTF Orion Planet-Search Program

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

Research paper thumbnail of The PTF Orion Planet-Search: Early Results from the First Data Set

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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Research paper thumbnail of Results from the PTF Orion Planet Search Program

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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