Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
A Spitzer View Of The Giant Molecular Cloud Mon Ob1/Ngc 2264, Valerie A. Rapson, Judith L. Pipher, R. A. Gutermuth, Megeatj S. Thomas, Thomas S. Allen, Phillip C. Myers, Lori E. Allen
A Spitzer View Of The Giant Molecular Cloud Mon Ob1/Ngc 2264, Valerie A. Rapson, Judith L. Pipher, R. A. Gutermuth, Megeatj S. Thomas, Thomas S. Allen, Phillip C. Myers, Lori E. Allen
Robert A. Gutermuth
We present Spitzer 3.6, 4.5, 5.8, 8.0, and 24 μm images of the Mon OB1 East giant molecular cloud, which contains the young star forming region NGC 2264, as well as more extended star formation. With Spitzer data and Two Micron All Sky Survey photometry, we identify and classify young stellar objects (YSOs) with dusty circumstellar disks and/or envelopes in Mon OB1 East by their infrared-excess emission and study their distribution with respect to cloud material. We find a correlation between the local surface density of YSOs and column density of molecular gas as traced by dust extinction that is …
The Extraordinary Far-Infrared Variation Of A Protostar: Herschel/Pacs Observations Of Lrll54361, Zoltan Balog, James Muzerolle, Kevin Flaherty, Ors H. Detre, Jeroen Bouwmann, Elise Furlan, R. A. Gutermuth, Attila Juhasz, John Bally
The Extraordinary Far-Infrared Variation Of A Protostar: Herschel/Pacs Observations Of Lrll54361, Zoltan Balog, James Muzerolle, Kevin Flaherty, Ors H. Detre, Jeroen Bouwmann, Elise Furlan, R. A. Gutermuth, Attila Juhasz, John Bally
Robert A. Gutermuth
We report Herschel/Photodetector Array Camera and Spectrometer (PACS) photometric observations at 70 μm and 160 μm of LRLL54361—a suspected binary protostar that exhibits periodic (P = 25.34 days) flux variations at shorter wavelengths (3.6 μm and 4.5 μm) thought to be due to pulsed accretion caused by binary motion. The PACS observations show unprecedented flux variation at these far-infrared wavelengths that are well correlated with the variations at shorter wavelengths. At 70 μm the object increases its flux by a factor of six while at 160 μm the change is about a factor of two, consistent with the wavelength dependence …
The Spitzer Survey Of Interstellar Clouds In The Gould Belt. Vi. The Auriga-California Molecular Cloud Observed With Irac And Mips, Hannah Broekhoven-Fiene, Brenda C. Matthews, Paul M. Harvey, R. A. Gutermuth, Tracy L. Huard, Nicholas F.H. Tothill, David Nutter, Tyler L. Bourke, James Difrancesco, Jes K. Jorgensen, Lori E. Allen, Nicholas L. Chapman, Michael M. Dunham, Bruno Merin, Jennifer Miller, Susan Terebey, Dawn E. Peterson, Karl R. Stapelfeldt
The Spitzer Survey Of Interstellar Clouds In The Gould Belt. Vi. The Auriga-California Molecular Cloud Observed With Irac And Mips, Hannah Broekhoven-Fiene, Brenda C. Matthews, Paul M. Harvey, R. A. Gutermuth, Tracy L. Huard, Nicholas F.H. Tothill, David Nutter, Tyler L. Bourke, James Difrancesco, Jes K. Jorgensen, Lori E. Allen, Nicholas L. Chapman, Michael M. Dunham, Bruno Merin, Jennifer Miller, Susan Terebey, Dawn E. Peterson, Karl R. Stapelfeldt
Robert A. Gutermuth
We present observations of the Auriga-California Molecular Cloud (AMC) at 3.6, 4.5, 5.8, 8.0, 24, 70, and 160 μm observed with the IRAC and MIPS detectors as part of the Spitzer Gould Belt Legacy Survey. The total mapped areas are 2.5 deg2 with IRAC and 10.47 deg2 with MIPS. This giant molecular cloud is one of two in the nearby Gould Belt of star-forming regions, the other being the Orion A Molecular Cloud (OMC). We compare source counts, colors, and magnitudes in our observed region to a subset of the SWIRE data that was processed through our pipeline. Using color-magnitude …
The Dependence Of Protostellar Lumosity On Environment In The Cygnus-X Star-Forming Complex, E. Kryukova, S.T. Megeath, J.L. Hora, R. A. Gutermuth, S. Bontemps, K. Kraemer, M. Hennemann, N. Schneider, Howard. A. Smith, F. Motte
The Dependence Of Protostellar Lumosity On Environment In The Cygnus-X Star-Forming Complex, E. Kryukova, S.T. Megeath, J.L. Hora, R. A. Gutermuth, S. Bontemps, K. Kraemer, M. Hennemann, N. Schneider, Howard. A. Smith, F. Motte
Robert A. Gutermuth
The Cygnus-X star-forming complex is one of the most active regions of low- and high-mass star formation within 2 kpc of the Sun. Using mid-infrared photometry from the IRAC and MIPS Spitzer Cygnus-X Legacy Survey, we have identified over 1800 protostar candidates. We compare the protostellar luminosity functions of two regions within Cygnus-X: CygX-South and CygX-North. These two clouds show distinctly different morphologies suggestive of dissimilar star-forming environments. We find the luminosity functions of these two regions are statistically different. Furthermore, we compare the luminosity functions of protostars found in regions of high and low stellar density within Cygnus-X and …
Ysovar: Mid-Ir Variability In The Star Forming Region Lynds 1688, H. M. Gunther, A. M. Cody, K. R. Covey, L. A. Hillenbrand, P. Plavchan, K. Poppenhaeger, L. M. Rebull, J. R. Stauffer, S. J. Wolk, L. Allen, A. Bayo, R. A. Gutermuth, J. L. Hora, H.Y.A. Meng, M. Morales-Calderon, J. R. Parks, Inseok Song
Ysovar: Mid-Ir Variability In The Star Forming Region Lynds 1688, H. M. Gunther, A. M. Cody, K. R. Covey, L. A. Hillenbrand, P. Plavchan, K. Poppenhaeger, L. M. Rebull, J. R. Stauffer, S. J. Wolk, L. Allen, A. Bayo, R. A. Gutermuth, J. L. Hora, H.Y.A. Meng, M. Morales-Calderon, J. R. Parks, Inseok Song
Robert A. Gutermuth
The emission from young stellar objects (YSOs) in the mid-infrared (mid-IR) is dominated by the inner rim of their circumstellar disks. We present IR data from the Young Stellar Object VARiability (YSOVAR) survey of ~800 objects in the direction of the Lynds 1688 (L1688) star-forming region over four visibility windows spanning 1.6 yr using the Spitzer Space Telescope in its warm mission phase. Among all light curves, 57 sources are cluster members identified based on their spectral energy distribution and X-ray emission. Almost all cluster members show significant variability. The amplitude of the variability is larger in more embedded YSOs. …