Search Publications
PTF10nvg: An Outbursting Class I Protostar in the Pelican/North American Nebula
Filippenko, Alexei V.; Cenko, S. Bradley; Law, Nicholas M. +28 more
During a synoptic survey of the North American Nebula region, the Palomar Transient Factory (PTF) detected an optical outburst (dubbed PTF10nvg) associated with the previously unstudied flat or rising spectrum infrared source IRAS 20496+4354. The PTF R-band light curve reveals that PTF10nvg brightened by more than 5 mag during the current outburst…
Spitzer Infrared Spectrometer 16 µm Observations of the Goods Fields
Papovich, Casey; Dickinson, Mark; Teplitz, Harry I. +13 more
We present Spitzer 16 µm imaging of the Great Observatories Origins Deep Survey (GOODS) fields. We survey 150 arcmin2 in each of the two GOODS fields (North and South), to an average 3σ depth of 40 and 65 µJy, respectively. We detect ~1300 sources in both fields combined. We validate the photometry using the 3-24 µm sp…
The Dust Properties of Two Hot R Coronae Borealis Stars and a Wolf-Rayet Central Star of a Planetary Nebula: In Search of a Possible Link
Sonneborn, G.; Gallagher, J. S.; Roman-Duval, J. +14 more
We present new Spitzer/IRS spectra of two hot R Coronae Borealis (RCB) stars, one in the Galaxy, V348 Sgr, and one lying in the Large Magellanic Cloud, HV 2671. These two objects may constitute a link between the RCB stars and the late Wolf-Rayet ([WCL]) class of central stars of planetary nebulae (CSPNe), such as CPD -56° 8032, that has little or…
V2492 Cygni: The Early Evolution of the 2010 Outburst
Aspin, Colin
We present Gemini-North optical and near-IR observations of a young eruptive star in Cygnus, designated as V2492 Cygni in the General Catalog of Variable Stars. This object is one of two young stars, located within 2 deg of each other, that recently brightened by around 5 mag and were reported as possible new FU Orionis-type variables. The outburs…
Far-infrared Imaging of Post-asymptotic Giant Branch Stars and (Proto)-planetary Nebulae with the AKARI Far-Infrared Surveyor
García-Lario, P.; García-Hernández, D. A.; Manchado, A. +1 more
By tracing the distribution of cool dust in the extended envelopes of post-asymptotic giant branch stars and (proto)-planetary nebulae ((P)PNe), we aim to recover, or constrain, the mass-loss history experienced by these stars in their recent past. The Far-Infrared Surveyor (FIS) instrument on board the AKARI satellite was used to obtain far-infra…
Testing the Global Star Formation relation: An HCO+ (3-2) Mapping Study of Red MSX Sources in the Bolocam Galactic Plane Survey
Juneau, Stéphanie; Reiter, Megan; Shirley, Yancy L. +1 more
We present an analysis of the relation between the star formation rate (SFR) and mass of dense gas in Galactic clumps and nearby galaxies. Using the bolometric luminosity as a measure of SFR and the molecular line luminosity of HCO+ (3-2) as a measure of dense gas mass, we find that the relation between SFR and M dense is app…
CSO Bolocam 1.1 mm Continuum Mapping of the Braid Nebula Star Formation Region in Cygnus OB7
Pyo, Tae-Soo; Smith, Michael D.; Aspin, Colin +9 more
We present a 1.1 mm map of the Braid Nebula star formation region in Cygnus OB7 taken using Bolocam on the Caltech Submillimeter Observatory. Within the 1 deg2 covered by the map, we have detected 55 cold dust clumps all of which are new detections. A number of these clumps are coincident with IRAS point sources although the majority ar…