THE FIRST Hi-GAL OBSERVATIONS OF THE OUTER GALAXY: A LOOK AT STAR FORMATION IN THE THIRD GALACTIC QUADRANT IN THE LONGITUDE RANGE 216.°5 ≲ ℓ ≲ 225.°5

Elia, D.; Molinari, S.; Fukui, Y.; Schisano, E.; Olmi, L.; Veneziani, M.; Hayakawa, Takahiro; Pestalozzi, M.; Schneider, N.; Benedettini, M.; Giorgio, A. M. Di; Ikhenaode, David; Mizuno, Akira; Onishi, Toshikazu; Pezzuto, S.; Piazzo, Lorenzo; Polychroni, D.; Rygl, K. L. J.; Yamamoto, H.; Maruccia, Y.

doi:10.1088/0004-637x/772/1/45

Cited by 118 publications

(250 citation statements)

References 80 publications

Supporting

Mentioning

233

Contrasting

Order By: Relevance

“…Excellent map alignment is essential to generate products such as column-density maps (e.g. Elia et al 2013) or to positionally match source counterparts at different wavelengths.…”

Section: Astrometric Correctionsmentioning

confidence: 99%

Hi-GAL, theHerschelinfrared Galactic Plane Survey: photometric maps and compact source catalogues

Molinari

Schisano

Elia

et al. 2016

A&A

Self Cite

242

272

View full text Add to dashboard Cite

Aims. We present the first public release of high-quality data products (DR1) from Hi-GAL, the Herschel infrared Galactic Plane Survey. Hi-GAL is the keystone of a suite of continuum Galactic plane surveys from the near-IR to the radio and covers five wavebands at 70, 160, 250, 350 and 500 µm, encompassing the peak of the spectral energy distribution of cold dust for 8 < ∼ T < ∼ 50 K. This first Hi-GAL data release covers the inner Milky Way in the longitude range 68 • > ∼ > ∼ −70 • in a |b| ≤ 1 • latitude strip. Methods. Photometric maps have been produced with the ROMAGAL pipeline, which optimally capitalizes on the excellent sensitivity and stability of the bolometer arrays of the Herschel PACS and SPIRE photometric cameras. It delivers images of exquisite quality and dynamical range, absolutely calibrated with Planck and IRAS, and recovers extended emission at all wavelengths and all spatial scales, from the point-spread function to the size of an entire 2 • × 2 • "tile" that is the unit observing block of the survey. The compact source catalogues were generated with the CuTEx algorithm, which was specifically developed to optimise source detection and extraction in the extreme conditions of intense and spatially varying background that are found in the Galactic plane in the thermal infrared. Results. Hi-GAL DR1 images are cirrus noise limited and reach the 1σ-rms predicted by the Herschel Time Estimators for parallel-mode observations at 60 s −1 scanning speed in relatively low cirrus emission regions. Hi-GAL DR1 images will be accessible through a dedicated web-based image cutout service. The DR1 Compact Source Catalogues are delivered as single-band photometric lists containing, in addition to source position, peak, and integrated flux and source sizes, a variety of parameters useful to assess the quality and reliability of the extracted sources. Caveats and hints to help in this assessment are provided. Flux completeness limits in all bands are determined from extensive synthetic source experiments and greatly depend on the specific line of sight along the Galactic plane because the background strongly varies as a function of Galactic longitude. Hi-GAL DR1 catalogues contain 123210, 308509, 280685, 160972, and 85460 compact sources in the five bands.

show abstract

“…Excellent map alignment is essential to generate products such as column-density maps (e.g. Elia et al 2013) or to positionally match source counterparts at different wavelengths.…”

Section: Astrometric Correctionsmentioning

confidence: 99%

Hi-GAL, theHerschelinfrared Galactic Plane Survey: photometric maps and compact source catalogues

Molinari

Schisano

Elia

et al. 2016

A&A

Self Cite

242

272

View full text Add to dashboard Cite

show abstract

“…The data have been absolutely calibrated. For more information of the absolute calibration of the Hi-GAL pipeline, we refer the reader to Elia et al (2013).…”

Section: The Observation and Analysis Methodsmentioning

confidence: 99%

Dust temperature maps of the Galactic plane: TheHerschelspectral energy distribution fitting with Cloudy predictions

Zhu¹,

Huang²

2014

A&A

View full text Add to dashboard Cite

Context. Dust grains absorb the interstellar far ultra-violet and visible photons and re-emit them in far-infrared (FIR) wavebands. The dust FIR continuum can be predicted by a grid of models using various values of the interstellar radiation field. Aims. We analyze the dust continuum emission in two Hi-GAL science-demonstration phase (SDP) fields using both the radiative transfer code, Cloudy, and the DustEM dust model, to explore the effect of radiative transfer on dust temperature. The 500 μm submillimeter excess emission and the very small grain (VSG) contribution to the 70 μm intensity are investigated by spectral energy distribution (SED) fitting using the Cloudy model. Methods. By comparing the observation with the model prediction, we derive dust temperature maps of the two SDP fields by fitting the dust SED with 4-band data (SPIRE bands plus PACS 160 μm) using both Cloudy and DustEM models. Considering radiative transfer and grain physics simultaneously, we investigate the existence of a 500 μm excess and estimate the VSG contribution to the 70 μm intensity by fitting the dust SED with 3-band data (160, 250, and 350 μm) and 5-band data (SPIRE and PACS bands), respectively. Results. We confirm that the field with star formation activities have a higher temperature (18.7 ± 0.9 K) than the quiescent region (15.2 ± 0.6 K). We find that the radiative transfer affects the FIR SED of the SDP fields and results in a higher temperature distribution than the dust-only model fit. There is no significant detection of a 500 μm excess in the two SDP fields. The relative contribution from the VSGs to the 70 μm intensity can be up to 50%.

show abstract

“…For the Herschel data we have used the prescription developed by the HiGAL team (Elia et al 2013) , where essentially a source is considered a candidate YSO if it is detected at 70 µm and appears in at least 3 contiguous bands.…”

Section: Young Stellar Populationmentioning

confidence: 99%

“…Observationally, the HiGAL team has developed a method to select YSO 'candidates' that allows such classification and places the sources in a bolometric luminosity versus mass envelope diagram, providing an idea on their evolutionary stage. The scheme, as mentioned above, requires a detection at 70 µm and three contiguous bands (to create a SED); for further details see (Elia et al 2013). In this study we have used such scheme, but we have gone a step further by trying to fit a SED model to data when possible, and using the Robitaille-Whitney Hyperion grid of models for such task (Robitaille & Whitney 2014).…”

Section: Young Stellar Populationmentioning

confidence: 99%

The infrared and molecular environment surrounding the Wolf-Rayet star WR 130

Cichowolski

Suad

Pineault

et al. 2015

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We present a study of the molecular CO gas and mid/far infrared radiation arising from the environment surrounding the Wolf-Rayet (W-R) star 130. We use the multi-wavelength data to analyze the properties of the dense gas and dust, and its possible spatial correlation with that of Young Stellar Objects (YSOs). We use CO J=1-0 data from the FCRAO survey as tracer of the molecular gas, and mid/far infrared data from the recent WISE and Herschel space surveys to study the dust continuum radiation and to identify a population of associated candidate YSOs. The spatial distribution of the molecular gas shows a ring-like structure very similar to that observed in the H i gas, and over the same velocity interval. The relative spatial distribution of the H i and CO components is consistent with a photo-dissociation region. We have identified and characterized four main and distinct molecular clouds that create this structure. Cold dust is coincident with the dense gas shown in the CO measurements. We have found several cYSOs that lie along the regions with the highest gas column density, and suggest that they are spatially correlated with the shell. These are indicative of regions of star formation induced by the strong wind and ionization of the WR star.

show abstract

THE FIRST Hi-GAL OBSERVATIONS OF THE OUTER GALAXY: A LOOK AT STAR FORMATION IN THE THIRD GALACTIC QUADRANT IN THE LONGITUDE RANGE 216.°5 ≲ ℓ ≲ 225.°5

Cited by 118 publications

References 80 publications

Hi-GAL, theHerschelinfrared Galactic Plane Survey: photometric maps and compact source catalogues

Hi-GAL, theHerschelinfrared Galactic Plane Survey: photometric maps and compact source catalogues

Dust temperature maps of the Galactic plane: TheHerschelspectral energy distribution fitting with Cloudy predictions

The infrared and molecular environment surrounding the Wolf-Rayet star WR 130

Contact Info

Product

Resources

About