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Star Formation in the Orion Nebula I: Stellar Content
August Muench, Konstantin Getman, Lynne Hillenbrand +1
The Orion Nebula is one of the most frequently observed nearby (<1 kiloparsec) star forming regions and, consequently, the subject of a large bibliography of observations and inter…
New M dwarf debris disk candidates in NGC 2547
Jan Forbrich, Charles J. Lada, August A. Muench +1
With only six known examples, M-dwarf debris disks are rare, even though M dwarfs constitute the majority of stars in the Galaxy. After finding a new M dwarf debris disk in a shall…
New Low-Mass Stars and Brown Dwarfs with Disks in the Chamaeleon I Star-Forming Region
K. L. Luhman, A. A. Muench
We have used images obtained with the Infrared Array Camera and the Multiband Imaging Photometer onboard the Spitzer Space Telescope to search for low-mass stars and brown dwarfs w…
Discovery of superthermal hydroxyl (OH) in the HH211 outflow
A. Tappe, C. J. Lada, J. H. Black +1
We present a 5-37 micron infrared spectrum obtained with the Spitzer Space Telescope toward the southeastern lobe of the young protostellar outflow HH211. The spectrum shows an ext…
The Nature of the Dense Core Population in the Pipe Nebula: Thermal Cores Under Pressure
Charles J. Lada, August A. Muench, Jill M. Rathborne +2
In this paper we present the results of a systematic investigation of an entire population of starless dust cores within a single molecular cloud. Analysis of extinction data shows…
The nature of the dense core population in the pipe nebula: core and cloud kinematics from C18O observations
August A. Muench, Charles J. Lada, Jill M. Rathborne +2
We present molecular-line observations of 94 dark cloud cores identified in the Pipe nebula through near-IR extinction mapping. Using the Arizona Radio Observatory 12m telescope, w…
The nature of the dense core population in the Pipe Nebula: A survey of NH3, CCS, and HC5N molecular line emission
J. M. Rathborne, C. J. Lada, A. A. Muench +2
Recent extinction studies of the Pipe Nebula (d=130 pc) reveal many cores spanning a range in mass from 0.2 to 20.4 Msun. These dense cores were identified via their high extinctio…
The Infrared Extinction Law at Extreme Depth in a Dark Cloud Core
C. Román-Zúñiga, C. Lada, A. Muench +1
We combined sensitive near-infrared data obtained with ground-based imagers on the ESO NTT and VLT telescopes with space mid-infrared data acquired with the IRAC imager on the Spit…
A Spitzer census of the IC 348 nebula
August A. Muench, Charles J. Lada, K. L. Luhman +2
We present a Spitzer based census of the IC 348 nebula and embedded star cluster. Our Spitzer census supplemented by ground based spectra has added 42 class II T-Tauri sources to t…
Silicon Monoxide Observations Reveal a Cluster of Hidden Compact Outflows in the OMC1 South Region
Luis A. Zapata, Paul T. P. Ho, Luis F. Rodriguez +3
We present high angular resolution () SiO J=54; line observations of the OMC1S region in the Orion Nebula made using the Submillimeter…
24-micron Detections of Disks around Very Low-mass Stars and Brown Dwarfs in IC 348: Grain Growth/Settling and Inner Holes?
James Muzerolle, Lucia Adame, Paola D'Alessio +11
We present observations of six late-type members of the young cluster IC 348 detected at 24 microns with the Multiband Imaging Photometer for Spitzer(MIPS). At least four of the ob…
Identifying Primordial Substructure in NGC 2264
Paula S. Teixeira, Charles J. Lada, Erick T. Young +8
We present new Spitzer Space Telescope observations of the young cluster NGC2264. Observations at 24 micron with the Multiband Imaging Photometer has enabled us to identify the mos…
Observations of IC348: The Disk Population at 2-3 Million Years
C. J. Lada, A. A. Muench, K. L. Luhman +10
We present near and mid-infrared photometry obtained with the Spitzer Space Telescope of 300 known members of the IC348 cluster. We merge this photometry with existing ground-based…
The Disk Fractions of Brown Dwarfs in IC 348 and Chamaeleon I
K. L. Luhman, C. J. Lada, L. Hartmann +7
Using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope, we have obtained mid-infrared photometry for 25 and 18 low-mass members of the IC 348 and Chamaeleon I st…
UBVRI Light Curves of 44 Type Ia Supernovae
Saurabh Jha, Robert P. Kirshner, Peter Challis +2
We present UBVRI photometry of 44 type-Ia supernovae (SN Ia) observed from 1997 to 2001 as part of a continuing monitoring campaign at the Fred Lawrence Whipple Observatory of the…
Global X-ray properties of the Orion Nebula region
Eric D. Feigelson, Konstantin Getman, Leisa Townsley +6
Based on the Chandra Orion Ultradeep Project (COUP) observation, we establish the global X-ray properties of the stellar population associated with the Orion Nebula. Three componen…
COUP census of X-ray stars in BN-KL and OMC-1S
N. Grosso, E. D. Feigelson, K. V. Getman +11
We present a study of the X-ray sources detected in the vicinity of two density peaks in the Orion Molecular Cloud 1 (OMC-1) behind the Orion Nebula Cluster (ONC), as seen in the e…
FLAMINGOS Spectroscopy of New Low-Mass Members of the Young Cluster IC 348
K. L. Luhman, Elizabeth A. Lada, August A. Muench +1
We present spectroscopy of candidate stellar and substellar members of the young cluster IC 348. Using the Florida Multi-Object Imaging Near-Infrared Grism Observational Spectromet…
Chandra Orion Ultradeep Project: Observations and Source Lists
K. V. Getman, E. Flaccomio, P. S. Broos +21
We present a description of the data reduction methods and the derived catalog of more than 1600 X-ray point sources from the exceptionally deep January 2003 Chandra X-ray Observat…
Deep 3.8 micron Observations of the Trapezium Cluster
C. J. Lada, A. A. Muench, E. A. Lada +1
We present deep 3.8 micron observations of the Trapezium cluster in Orion obtained with the ESO VLT. We use these data to search for infrared excess emission and evidence for proto…
Why are the K dwarfs in the Pleiades so Blue?
John R. Stauffer, Burton F. Jones, Dana Backman +5
The K dwarfs in the Pleiades fall nearly one half magnitude below a main sequence isochrone when plotted in a color-magnitude diagram utilizing V magnitude as the luminosity index…
A Census of the Young Cluster IC 348
K. L. Luhman, John R. Stauffer, A. A. Muench +4
We present a new census of the stellar and substellar members of the young cluster IC 348. We have obtained images at I and Z for a 42'x28' field encompassing the cluster and have…
A Study of the Luminosity and Mass Functions of the Young IC 348 Cluster using FLAMINGOS Wide-Field Near-Infrared Images
A. A. Muench, E. A. Lada, C. J. Lada +7
We present wide-field near-infrared (JHK) images of the young, 2 Myr IC 348 cluster taken with FLAMINGOS. We use these new data to construct an infrared census of sources, which is…
The Luminosity & Mass Function of the Trapezium Cluster: From B stars to the Deuterium Burning Limit
A. Muench, E. Lada, C. Lada +1
We use the results of a new, multi-epoch, multi-wavelength, near-infrared census of the Trapezium Cluster in Orion to construct and to analyze the structure of its infrared (K band…