The LAEX and NASA portals for CoRoT public data (2009)
Solano, E., Von Braun, K., Velasco, A., Ciardi, D. R., Gutiérrez, R., McElroy, D. L., ...
Aims. We describe here the main functionalities of the LAEX (Laboratorio de Astrofísica Estelar y Exoplanetas/Laboratory for Stellar Astrophysics and Exoplanets) and NASA portals for CoRoT Public...
Mid-Infrared Variability of Protostars in IC 1396A (2009)
Morales-Calderón, M., Stauffer, J. R., Rebull, L., Whitney, B. A., Ardila, D. R., ...
We have used Spitzer/Infrared Array Camera (IRAC) to conduct a photometric monitoring program of the IC1396A dark globule in order to study the mid-IR (3.6-8 μm) variability of the heavily embedded...
The Spitzer Deep, Wide-field Survey (2009)
Ashby, M. L. N., Stern, D., Brodwin, M., Griffith, R., Eisenhardt, P., Kozlowski, S., ...
The Spitzer Deep, Wide-Field Survey (SDWFS) is a four-epoch infrared survey of 10 deg^(2) in the Bootes field of the NOAO Deep Wide-Field Survey using the IRAC instrument on the Spitzer Space...
Mid-Infrared Variability of protostars in IC 1396A (2009)
Morales-Calderon, M., Stauffer, J. R., Rebull, L., Whitney, B. A., Navascues, D. Barrado Y, Ardila, D. R., ...
We have used Spitzer/IRAC to conduct a photometric monitoring program of the IC1396A dark globule in order to study the mid-IR (3.6 - 8 micron) variability of the heavily embedded Young Stellar...
The LAEX and NASA portals for CoRoT public data (2009)
Solano, E., Von Braun, K., Velasco, A., Ciardi, D. R., Gutierrez, R., McElroy, D. L., ...
* Aims. We describe here the main functionalities of the LAEX (Laboratorio de Astrofisica Estelar y Exoplanetas/Laboratory for Stellar Astrophysics and Exoplanets) and NASA portals for CoRoT Public...
New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope (2009)
Plavchan, Peter, Werner, M. W., Chen, C. H., Stapelfeldt, K. R., Su, K. Y. L., Stauffer, J. R., ...
We present 24 μm and 70 μm Multiband Imaging Photometer for Spitzer (MIPS) observations of 70 A through M-type dwarfs with estimated ages from 8 Myr to 1.1 Gyr, as part of a Spitzer guaranteed time...
The Spitzer Deep, Wide-Field Survey (2009)
Ashby, M. L. N., Stern, D., Brodwin, M., Griffith, R., Eisenhardt, P., Kozlowski, S., ...
The Spitzer Deep, Wide-Field Survey (SDWFS) is a four-epoch infrared survey of ten square degrees in the Bootes field of the NOAO Deep Wide-Field Survey using the IRAC instrument on the Spitzer Space...
New Debris Disks Around Young, Low Mass Stars Discovered With The Spitzer Space Telescope (2009)
Plavchan, Peter, Werner, M. W., Chen, C. H., Stapelfeldt, K. R., Su, K. Y. L., Stauffer, J. R., ...
(abridged) We present 24 and 70 micron MIPS observations of 70 A through M-type dwarfs with estimated ages from 8 Myr to 1.1 Gyr, as part of a Spitzer guaranteed time program. Our sample is selected...
The North American and Pelican Nebulae I. IRAC Observations (2009)
Guieu, S., Rebull, L. M., Stauffer, J. R., Hillenbrand, L. A., Carpenter, J. M., Noriega-Crespo, A., ...
We present a 9 deg^2 map of the North American and Pelican Nebulae regions obtained in all four IRAC channels with the Spitzer Space Telescope. The resulting photometry is merged with that at JHKs...
Different Proportions of Suitable Habitat – A Review. Oikos 71: 355-366. (2008)
Leonardo Di Vinci, D. Bayles, D. L. Bottom, K. P. Currens, C. A. Frissell, D. Hankin, ...
"When you put your hand in a flowing stream, you touch the last of what has gone before and the first of what is yet to come..."
New Young Brown Dwarfs in the Orion Molecular Cloud 2/3 Region (2008)
Peterson, Dawn E., Megeath, S. T., Luhman, K. L., Pipher, J. L., Stauffer, J. R., ...
Forty new low-mass members with spectral types ranging from M4 to M9 have been confirmed in the Orion Molecular Cloud (OMC) 2/3 region. Through deep, I-, z'-, J-, H-, and K-band photometry of a 20'...
Spitzer MIPS observations of stars in the β Pictoris moving group (2008)
Rebull, L. M., Stapelfeldt, K. R., Werner, M. W., Mannings, V. G., Chen, C., Stauffer, J. R., ...
We present Multiband Imaging Photometer for Spitzer (MIPS) observations at 24 and 70 μm for 30 stars, and at 160 μm for a subset of 12 stars, in the nearby (~30 pc), young (~12 Myr) β Pictoris...
Circumstellar Disks in the Outer Galaxy: the Star-Forming Region NGC 1893 (2008)
Caramazza, M., Micela, G., Prisinzano, L., Rebull, L., Sciortino, S., Stauffer, J. R.
It is still debated whether star formation process depends on environment. In particular it is yet unclear whether star formation in the outer Galaxy, where the environmental conditions are,...
The NStED Stellar and Exoplanet Hosting Star Service (2008)
Ramirez, S., Ali, B., Baker, R., Berriman, G. B., Von Braun, K., Chiu, N-M., ...
The NASA Star and Exoplanet Database (NStED) is a general purpose stellar archive with the aim of providing support for NASA's planet finding and characterization goals, stellar astrophysics, and the...
The NStED Exoplanet Transit Survey Service (2008)
Von Braun, K., Abajian, M., Ali, B., Baker, R., Berriman, G. B., Chiu, N-M., ...
The NASA Star and Exoplanet Database (NStED) is a general purpose stellar archive with the aim of providing support for NASA's planet finding and characterization goals, stellar astrophysics, and the...
New Young Brown Dwarfs in the Orion Molecular Cloud 2/3 Region (2008)
Peterson, Dawn E., Megeath, S. T., Luhman, K. L., Pipher, J. L., Stauffer, J. R., Navascues, D. Barrado Y, ...
Forty new low mass members with spectral types ranging from M4-M9 have been confirmed in the Orion Molecular Cloud 2/3 region. Through deep, I, z', J, H, K photometry of a 20' x 20' field in OMC 2/3,...
Circumstellar disks in the outer galaxy : the star-forming region NGC 1893 (2008)
Caramazza, M., Micela, G., Prisinzano, L., Rebull, L., Sciortino, S., Stauffer, J. R.
Context. It is still debated whether star formation process depends on environment. In particular it is yet unclear whether star formation in the outer Galaxy, where the environmental conditions are,...
X-ray properties of protostars in the Orion Nebula (2008)
Prisinzano, L., Micela, G., Flaccomio, E., Stauffer, J. R., Megeath, T., Rebull, L., ...
The origin and evolution of the X-ray emission in very young stellar objects (YSOs) are not yet well understood because it is very hard to observe YSOs in the protostellar phase. Using COUP data, we...
Bouvier, J., Kendall, T., Meeus, G., Testi, L., Moraux, E., Stauffer, J. R., ...
Aims. We conducted a search for brown dwarfs (BDs) and very low mass (VLM) stars in the 625 Myr-old Hyades cluster in order to derive the cluster's mass function across the stellar-substellar...
Spitzer/MIPS Observations of Stars in the Beta Pictoris Moving Group (2008)
Rebull, L. M., Stapelfeldt, K. R., Werner, M. W., Mannings, V. G., Chen, C., Stauffer, J. R., ...
We present Multiband Imaging Photometer for Spitzer (MIPS) observations at 24 and 70 microns for 30 stars, and at 160 microns for a subset of 12 stars, in the nearby (~30 pc), young (~12 Myr) Beta...
Meyer, M. R., Carpenter, J. M., Mamajek, E. E., Hillenbrand, L. A., Hollenbach, D., Moro-Martin, A., ...
We report observations from the Spitzer Space Telescope regarding the frequency of 24 μm excess emission toward Sun-like stars. Our unbiased sample is composed of 309 stars with masses 0.7-2.2 M⊙...
Bouvier, J., Kendall, T. T., Meeus, G., Testi, L., Moraux, E., Stauffer, J. R., ...
We conducted a search for brown dwarfs (BDs) and very low mass (VLM) stars in the 625 Myr-old Hyades cluster in order to derive the cluster's mass function across the stellar-substellar boundary. We...
Meyer, M. R., Carpenter, J. M., Mamajek, E. E., Hillenbrand, L. A., Hollenbach, D., Moro-Martin, A., ...
We report observations from the Spitzer Space Telescope regarding the frequency of 24 mum excess emission toward Sun-like stars. Our unbiased sample is composed of 309 stars with masses 0.7-2.2...
X-ray properties of protostars in the Orion Nebula (2007)
Prisinzano, L., Micela, G., Flaccomio, E., Stauffer, J. R., Megeath, T., Rebull, L., ...
The origin and evolution of the X-rays in very young stellar objects (YSOs) are not yet well understood since it is very hard to observe YSOs in the protostellar phase. We study the X-ray properties...
Meyer, M. R., Carpenter, J. M., Mamajek, E. E., Hillenbrand, L. A., Hollenbach, D., Moro-Martin, A., ...
We report observations from the Spitzer Space Telescope (SST) regarding the frequency of 24 micron excess emission toward sun-like stars. Our unbiased sample is comprised of 309 stars with masses...
The young, wide and very low mass visual binary LOri167 (2007)
Navascues, D. Barrado Y, Bayo, A., Morales-Calderon, M., Huelamo, N., Stauffer, J. R., Bouy, H.
We look for wide, faint companions around members of the 5 Myr Lambda Orionis open cluster. We used optical, near-infrared, and Spitzer/IRAC photometry. We report the discovery of a very wide very...
SPITZER: Accretion in Low Mass Stars and Brown Dwarfs in the Lambda Orionis Cluster (2007)
Navascues, D. Barrado Y, Stauffer, J. R., Morales-Calderon, M., Bayo, A., Fazzio, G., Megeath, T., ...
We present multi-wavelength optical and infrared photometry of 170 previously known low mass stars and brown dwarfs of the 5 Myr Collinder 69 cluster (Lambda Orionis). The new photometry supports...
The Lambda Orionis Star Forming Region: the Spitzer perspective (2007)
A. Bayo, J. R. Stauffer, M. Morales Calderón
The Head of Orion is a complex star forming region which includes a young open cluster (Collinder 69, about 5 Myr), two dark clouds (Barnard 30 and Barnard 35, with younger populations) and other...
A search for weather in late L dwarfs (2007)
J. R. Stauffer, M. Morales Calderón
We have conducted a photometric monitoring program of 3 field late-L brown dwarfs using Spitzer/IRAC 4.5 and 8 um bandpasses. The aim of this work is to look for evidences of non-axisymmetric...
Discovery of Two T Dwarf Companions with the Spitzer Space Telescope (2006)
Luhman, K. L., Patten, B. M., Marengo, M., Schuster, M. T., Hora, J. L., Ellis, R. G., ...
We report the discovery of T dwarf companions to the nearby stars HN Peg (G0V, 18.4 pc, ~0.3 Gyr) and HD 3651 (K0V, 11.1 pc, ~7 Gyr). During an ongoing survey of 5'x5' fields surrounding stars in the...
A Sensitive Search for Variability in Late L Dwarfs: The Quest for Weather (2006)
Morales-Calderon, M., Stauffer, J. R., Kirkpatrick, J. Davy, Carey, S., Gelino, C. R., Navascues, D. Barrado Y, ...
We have conducted a photometric monitoring program of 3 field late-L brown dwarfs looking for evidence of non-axisymmetric structure or temporal variability in their photospheres. The observations...
A correlation between pre-main-sequence stellar rotation rates and IRAC excesses in Orion (2006)
Rebull, L. M., Stauffer, J. R., Megeath, S. T., Hora, J. L., Hartmann, L.
Early observations of T Tauri stars suggested that stars with evidence of circumstellar accretion disks rotated slower than stars without such evidence, but more recent results are not as clear....
A Correlation Between Pre-Main Sequence Stellar Rotation Rates and IRAC Excesses in Orion (2006)
Rebull, L. M., Stauffer, J. R., Megeath, S. T., Hora, J. L., Hartmann, L.
Early observations of T Tauri stars suggested that stars with evidence of circumstellar accretion disks rotated slower than stars without such evidence, but more recent results are not as clear....
Chandra X-Ray Observations of Young Clusters. III. NGC 2264 and the Orion Flanking Fields (2006)
Rebull, L. M., Stauffer, J. R., Ramirez, S. V., Flaccomio, E., Sciortino, S., Micela, G., ...
Chandra observations of solar-like pre-main sequence (PMS) stars in the Orion Flanking Fields (age ~1 Myr) and NGC 2264 (~3 Myr) are compared with the results of the COUP survey of similar objects in...
Silverstone, M. D., Meyer, M. R., Mamajek, E. E., Hines, D. C., Hillenbrand, L. A., Najita, J., ...
We present data obtained with the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope (Spitzer) for a sample of 74 young (t
Silverstone, M. D., Meyer, M. R., Mamajek, E. E., Hines, D. C., Hillenbrand, L. A., Najita, J., ...
We present data obtained with the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope (Spitzer) for a sample of 74 young (t < 30 Myr old) Sun-like (0.7 < M(star)/M(Sun) < 1.5) stars....
The 0.03-10Mo mass function of young open clusters (2005)
Bouvier, J., Moraux, E., Stauffer, J. R.
We report the present day mass functions (PDMFs) of 3 young open clusters over a mass range from 30 Jupiter masses to 10~\msunn. The PDMFs of the 3 clusters are remarkably similar, suggesting little...
The lower mass function of young open clusters (2005)
Bouvier, J., Moraux, E., Stauffer, J. R., Navascues, D. Barrado Y
We report new estimates for the lower mass function of 5 young open clusters spanning an age range from 80 to 150 Myr. In all studied clusters, the mass function across the stellar/substellar...
A Spitzer/IRAC Survey of the Orion Molecular Clouds (2005)
Megeath, S. T., Flaherty, K. M., Hora, J., Allen, L. E., Fazio, G. G., Hartmann, L., ...
We present initial results from a survey of the Orion A and B molecular clouds made with the InfraRed Array Camera (IRAC) onboard the Spitzer Space Telescope. This survey encompasses a total of 5.6...
Spitzer Observations of G Dwarfs in the Pleiades: Circumstellar Debris Disks at 100 Myr Age (2005)
Stauffer, J. R., Rebull, L., Carpenter, J., Hillenbrand, L., Backman, D., Meyer, M. R., ...
Fluxes and upper limits in the wavelength range from 3.6 to 70 microns from the Spitzer Space Telescope are provided for twenty solar-mass Pleiades members. One of these stars shows a probable mid-IR...
Uzpen, B., Kobulnicky, H. A., Olsen, K. A. G., Clemens, D. P., Laurance, T. L., Meade, M. R., ...
Spitzer IRAC 3.6-8 micron photometry obtained as part of the GLIMPSE survey has revealed mid-infrared excesses for 33 field stars with known spectral types in a 1.2 sq. degree field centered on the...
A near-infrared survey for new low-mass members in Alpha Per (2005)
Lodieu, N., McCaughrean, M. J., Navascues, D. Barrado Y, Bouvier, J., Stauffer, J. R.
We present a near-infrared (K'-band) survey of 0.7 square degree area in the Alpha Persei open cluster (age = 90 Myr, distance = 182 pc) carried out with the Omega-Prime camera on the Calar Alto...
Moro-Martín, A., Meyer, M. R., Hillenbrand, L. A., Backman, D. E., Beckwith, S. V. W., Bouwman, J., ...
We present 3-160 mum photometry obtained with IRAC and MIPS, spectrophotometry from 5-35 mum using IRS low resolution, and IRS high resolution spectrum of HD 105 (G0 V, 30±10 Myr, 40±1 pc) and HD...
The Collinder 69 cluster in the context of the Lambda Orionis SFR (2004)
Navascues, David Barrado Y, Stauffer, J. R., Bouvier, J., Jayawardhana, R.
The Lambda Orionis Star Forming Region is a complex structure which includes the Col 69 (Lambda Orionis) cluster and the B30 & B35 dark clouds. We have collected deep optical photometry and...
Discovery of a New Low-Latitude Milky Way Globular Cluster using GLIMPSE (2004)
Kobulnicky, Chip, Monson, A. J., Buckalew, B. A, Darnel, J. M., Uzpen, B., Whitney, B. A., ...
Spitzer Space Telescope imaging as part of the Galactic Legacy Mid-Plane Survey Extraordinaire (GLIMPSE) reveals a previously unidentified low-latitude rich star cluster near l=31.3 degrees, b=-0.1...
Lambda Orionis: A 0.02-50 Msun Initial Mass Function (2004)
Navascues, David Barrado Y, Stauffer, J. R., Bouvier, J.
The Lambda Orionis Star Forming Region is dominated by the O8 III star lambda^1 Ori. Among other structures, it includes a CO and a dust ring whose diameter is about nine deg, the S264 HII region, a...
The 0.03-10Mo mass function of young open clusters (2004)
Bouvier, J., Moraux, E., Stauffer, J. R.
We report the present day mass functions (PDMFs) of 3 young open clusters over a mass range from 30 Jupiter masses to 10~\msunn. The PDMFs of the 3 clusters are remarkably similar, suggesting little...
Indebetouw, R., Mathis, J. S., Babler, B. L., Meade, M. R., Watson, C., Whitney, B. A., ...
We determine and tabulate A(lambda)/A(K), the wavelength dependence of interstellar extinction, in the Galactic plane for 1.25um
Meyer, M. R., Hillenbrand, L. A., Backman, D. E., Beckwith, S. V. W., Bouwman, J., Brooke, T. Y., ...
We present 3-160 micron photometry obtained with the IRAC and MIPS instruments for the first five targets from the Spitzer Legacy Science Program "Formation and Evolution of Planetary Systems" and...
Structure and Colors of Diffuse Emission in the Spitzer Galactic First Look Survey (2004)
Ingalls, James G., Reach, William T., Noriega-Crespo, A., Carey, Sean J., Boulanger, F., ...
We investigate the density structure of the interstellar medium using new high-resolution maps of the 8 micron, 24 micron, and 70 micron surface brightness towards a molecular cloud in the Gum...
The IRAC Shallow Survey (2004)
Eisenhardt, P. R., Stern, D., Brodwin, M., Fazio, G. G., Rieke, G. H., Rieke, M. J., ...
The IRAC shallow survey covers 8.5 square degrees in the NOAO Deep Wide-Field Survey in Bootes with 3 or more 30 second exposures per position. An overview of the survey design, reduction,...
A GLIMPSE of Star Formation in the Giant H II Region RCW 49 (2004)
Whitney, B. A., Indebetouw, R., Babler, B. L., Meade, M. R., Watson, C., Wolff, M. J., ...
GLIMPSE imaging using the Infrared Array Camera (IRAC) on the Spitzer Space Telescope indicates that star formation is ongoing in the RCW 49 giant H II region. A photometric comparison of the sources...
The substellar population of the young cluster lambda Orionis (2004)
Navascues, David Barrado Y, Stauffer, J. R., Bouvier, J., Jayawardhana, R., Cuillandre, Jean-Charles
By collecting optical and infrared photometry and low resolution spectroscopy, we have identified a large number of low mass stars and brown dwarf candidates belonging to the young cluster (~5 Myr)...
The 0.03-10Mo mass function of young open clusters (2004)
Bouvier, J., Moraux, E., Stauffer, J. R.
We report the present day mass functions (PDMFs) of 3 young open clusters over a mass range from 30 Jupiter masses to 10~\msunn. The PDMFs of the 3 clusters are remarkably similar, suggesting little...
The 0.03-10Mo mass function of young open clusters (2004)
Bouvier, J., Moraux, E., Stauffer, J. R.
We report the present day mass functions (PDMFs) of 3 young open clusters over a mass range from 30 Jupiter masses to 10~\msunn. The PDMFs of the 3 clusters are remarkably similar, suggesting little...
Meyer, M. R., Hillenbrand, L. A., Backman, D. E., Beckwith, S. V. W., Bouwman, J., Brooke, T. Y., ...
We present 3-160 mum photometry obtained with the Infrared Array Camera (IRAC) and Multiband Imaging Photometer for Spitzer (MIPS) instruments for the first five targets from the Spitzer Space...
Pinsonneault, M. H., Terndrup, D. M., Hanson, R. B., Stauffer, J. R.
We continue our series of papers on open cluster distances by comparing multicolor photometry of single stars in the Hyades to theoretical isochrones constructed with various color-temperature...
Pinsonneault, M. H., Terndrup, D. M., Hanson, R. B., Stauffer, J. R.
In the first of a new series of papers on open cluster distances, we use updated stellar evolution models to construct an isochrone appropriate for the Hyades, and compare it with the Hyades...
Cool stars in NGC 2547 and pre main sequence lithium depletion (2003)
Jeffries, R. D, Oliveira, J. M., Navascues, D. Barrado Y, Stauffer, J. R.
We present the results of a spectroscopic survey of X-ray selected, low-mass candidate members of the young open cluster NGC 2547. Using a combination of photometry, spectroscopic indices and radial...
The lithium depletion boundary and the age of NGC 2547 (2003)
Oliveira, J. M., Jeffries, R. D., Devey, C. R., Navascues, D. Barrado Y, Naylor, T., Stauffer, J. R., ...
We present the results of a photometric and spectroscopic survey of cool M dwarf candidates in the young open cluster NGC 2547. Using the 2dF fiber spectrograph, we have searched for the luminosity...
Brown dwarfs in the Pleiades cluster : clues to the substellar mass function (2002)
Moraux, E., Bouvier, J., Stauffer, J. R., Cuillandre, J-C.
We present the results of a 6.4 square degrees imaging survey of the Pleiades cluster in the I and Z-bands. The survey extends up to 3 degrees from the cluster center and is 90% complete down to...
The lower mass function of young open clusters (2002)
Bouvier, J., Moraux, E., Stauffer, J. R., Navascues, D. Barrado Y
We report new estimates for the lower mass function of 5 young open clusters spanning an age range from 80 to 150 Myr. In all studied clusters, the mass function across the stellar/substellar...
Structure of the Praesepe Star Cluster (2002)
Adams, J.D., Stauffer, J.R., Skrutskie, M.F., Monet, D.G., Portegies Zwart, S.F., Janes, K.A., ...
The lower mass function of young open clusters (2002)
Bouvier, J., Moraux, E., Stauffer, J. R., Navascues, D. Barrado Y
We report new estimates for the lower mass function of 5 young open clusters spanning an age range from 80 to 150 Myr. In all studied clusters, the mass function across the stellar/substellar...
The lower mass function of young open clusters (2002)
Bouvier, J., Moraux, E., Stauffer, J. R., Navascues, D. Barrado Y
We report new estimates for the lower mass function of 5 young open clusters spanning an age range from 80 to 150 Myr. In all studied clusters, the mass function across the stellar/substellar...
Randich, S., Pallavicini, R., Meola, G., Stauffer, J. R., Balachandran, Suchitra C.
We present lithium abundances for ~50 X-ray selected candidate members of the 30-50 Myr old open clusters IC 2602 and IC 2391. These data enlarge and extend to cooler temperatures previous Li surveys...
The Mass Function and Structure of the Praesepe Cluster: Additional Proper Motion Candidates (2001)
Adams, J.D., Stauffer, J.R., Skrutskie, M.F., Monet, D.G., Portegies Zwart, S.F., Beichman, C.A.
Proper motion of very low mass stars and brown dwarfs in the Pleiades cluster (2000)
Moraux, E., Bouvier, J., Stauffer, J. R.
We report proper motion measurements for 25 very-low mass (VLM) star and brown dwarf (BD) candidates of the Pleiades cluster previously identified by Bouvier et al. (1998). Proper motions are...
Submillimeter Wave Astronomy Satellite Observations of Extended Water Emission in Orion (2000)
Snell, R. L., Howe, J. E., Ashby, M. L. N., Bergin, E. A., Chin, G., Erickson, N. R., ...
We have used the Submillimeter Wave Astronomy Satellite to map the ground-state 1_{10}-1_{01} transition of ortho-water at 557 GHz in the Orion molecular cloud. Water emission was detected in Orion...
The Distribution of Water Emission in M17SW (2000)
Snell, R. L., Howe, J. E., Ashby, M. L. N., Bergin, E. A., Chin, G., Erickson, N. R., ...
We present a 17-point map of the M17SW cloud core in the 1_{10}-1_{01} transition of ortho-water at 557 GHz obtained with the Submillimeter Wave Astronomy Satellite. Water emission was detected in 11...
Water Abundance in Molecular Cloud Cores (2000)
Snell, R. L., Howe, J. E., Ashby, M. L. N., Bergin, E. A., Chin, G., Erickson, N. R., ...
We present Submillimeter Wave Astronomy Satellite (SWAS) observations of the 1_{10}-1_{01} transition of ortho-water at 557 GHz toward 12 molecular cloud cores. The water emission was detected in NGC...
Extended [C I] and ^{13}CO(5-4) Emission in M17SW (2000)
Howe, J. E., Ashby, M. L. N., Bergin, E. A., Chin, G., Erickson, N. R., Goldsmith, P. F., ...
We mapped a 13 by 22 pc region in emission from 492 GHz [C I] and, for the first time, 551 GHz ^{13}CO(5-4) in the giant molecular cloud M17SW, using the Submillimeter Wave Astronomy Satellite. The...
Ages, Distances, and the Initial Mass Functions of Stellar Clusters (2000)
Stauffer, J. R., Jeffries, R. D., Martin, E. L., Terndrup, D. M.
We provide a review of the current status of several topics on the ages, distances, and mass functions of open clusters, with a particular emphasis on illuminating the areas of uncertainty. Hipparcos...
Stauffer, J. R., Navascués, D. Barrado Y, Bouvier, J., Morrison, H. L., Harding, P., Luhman, K. L., ...
We have identified twenty-seven candidate very low mass members of the relatively young Alpha Persei open cluster from a six square degree CCD imaging survey. Based on their I magnitudes and the...
WIYN Open Cluster Study: Lithium in Cool Dwarfs of the M35 Open Cluste (1999)
Navascues, D. Barrado Y, Deliyannis, C. P., Stauffer, J. R.
We have obtained high resolution spectra of $\sim$40 members of M35, determined the Lithium-T$_{\rm{eff}}$ morphology and the distribution of the rotational velocity for G and K stars, and compared...
A Lithium Age for the Young Cluster IC2391 (1999)
Navascues, D. Barrado Y, Stauffer, J. R., Patten, B. M.
We have identified a large number of possible very low mass members of the cluster IC2391 based primarily on their location in an I versus (R-I)_C CM diagram. We have obtained new photometry and low...
The Lithium Depletion Boundary and the Age of the Young Open Cluster IC~2391 (1999)
Navascues, D. Barrado Y, Stauffer, J. R., Patten, B. M.
We have obtained new photometry and intermediate resolution ($\Delta \lambda = 2.7$ \AA\ ) spectra of 19 of these objects (14.9 $\le$ $I_c$ $\le$ 17.5) in order to confirm cluster membership. We...
Navascues, D. Barrado Y, Stauffer, J. R., Song, I., Caillault, J-P.
We have reanalyzed data for the proposed moving group associated with beta Pic in order to determine if the group (or part of it) is real, and, if so, to derive an improved age estimate for beta Pic....
Mass Function at the end of the Main Sequence: the M35 Open Cluster (1999)
Navascues, D. Barrado Y, Stauffer, J. R., Bouvier, J., Martin, E. L.
We present very deep RIc photometry of the M35 open cluster. We have covered 30' \times 30', equivalent to about a fourth of the total area of the cluster. The data range from I_c=17.5 to 23.5...
Brown Dwarfs: Toward a New Age Scale for Young Open Cluster (1999)
Navascues, D. Barrado Y, Stauffer, J. R., Bouvier, J.
We review our the status of the photometric searches of brown dwarfs and vely low mass stars in several young open clusters and present some results on the spectroscopic follow-up, including new...
Deep Photometric Survey of IC2391 (1999)
Navascues, D. Barrado Y, Stauffer, J. R., Briceño, C.
We present a deep survey of the young southern cluster IC2391. We have covered 2 sq. degrees in the R,I filter. We have selected several dozens VLM stars and BD candidates based on the position of...
Stellar Activity in Coeval Open Clusters: Praesepe and The Hyades (1998)
Navascues, D. Barrado Y, Stauffer, J. R., Randich, S.
Randich and Schmitt [1995, A&A 298, 115] found that the coronal activity of solar-type and low mass stars in Praesepe is significantly lower than that of stars in the Hyades cluster. We have carried...
Why is the X-ray luminosity function different for the Hyades and Praesepe? (1997)
Navascues, D. Barrado Y, Stauffer, J. R., Randich, S.
We have studied dF-dK and dM stars belonging to Praesepe in order to determine membership via radial velocities and to compare several stellar properties, such as X-ray luminosities, H$\alpha$...
Lithium and binarity in M67 (1997)
Navascues, D. Barrado Y, Stauffer, J. R., Balachandran, S.
A study of the lithium abundances in binaries of the old open cluster M67 is presented. Abundances were estimated using curves of growth and equivalent widths of the LiI6707.8 \AA{} doublet. We have...
Lithium Abundance in Binaries of the Hyades Open Cluster (1997)
Navascues, D. Barrado Y, Stauffer, J. R.
We have derived accurate and homogeneous Lithium abundances in 49 main sequence binary systems belonging to the Hyades Open Cluster by using a deconvolution method to determine individual magnitudes...
The Age of Gl879 and Fomalhaut (1997)
Navascues, D. Barrado Y, Stauffer, J. R., Hartmann, L., Balachandran, S. C.
We estimate here the age of one of the prototypes of the Beta Pic-like stars, Fomalhaut, based on the properties of its common proper motion companion Gl879. By combining constraints derived from the...
Arnegard, M. E., Markert, J. A., Danley, P. D., Stauffer, J. R., Ambali, A. J., Kocher, T. D.
Extremely fine-scale genetic partitioning has recently been detected among populations of Lake Malawi's rock-dwelling cichlids through the study of microsatellite loci. Understanding the mechanisms...
X-ray properties of protostars in the Orion Nebula
L. Prisinzano, G. Micela, E. Flaccomio, J. R. Stauffer, T. Megeath, L. Rebull, ...
The origin and evolution of the X-ray emission in very young stellar objects (YSOs) are not yet well understood because it is very hard to observe YSOs in the protostellar phase. We study the X-ray...