Showing 2015 · astro-ph.GAShow all

59 papers · 2 filters

astro-ph.GA2015★ 20 cited

Ortho-to-para ratio of NH2. Herschel-HIFI observations of ortho- and para-NH2 rotational transitions towards W31C, W49N, W51 and G34.3+0.1

C. M. Persson, A. O. H. Olofsson, R. Le Gal +10

We have used the Herschel-HIFI instrument to observe both nuclear spin symmetries of amidogen (NH2) towards the high-mass star-forming regions W31C (G10.6-0.4), W49N (G43.2-0.1), W…

astro-ph.GA2015★ 338 cited

The Chandra COSMOS Legacy survey: optical/IR identifications

S. Marchesi, F. Civano, M. Elvis +27

We present the catalog of optical and infrared counterparts of the Chandra COSMOS-Legacy Survey, a 4.6 Ms Chandra program on the 2.2 square degrees of the COSMOS field, combination…

astro-ph.GA2015★ 85 cited

Large-scale outflows in luminous QSOs revisited: The impact of beam smearing on AGN feedback efficiencies

B. Husemann, J. Scharwächter, V. N. Bennert +3

[Abridged] Enormous observational efforts have been made to constrain the energetics of AGN feedback by mapping the kinematics of the ionized gas on kpc scale. We study how the obs…

astro-ph.GA2015★ 63 cited

Jet multiplicity in the proto-binary system NGC1333-IRAS4A. The detailed CALYPSO IRAM-PdBI view

G. Santangelo, C. Codella, S. Cabrit +10

Owing to the paucity of sub-arcsecond (sub)mm observations required to probe the innermost regions of newly forming protostars, several fundamental questions are still being debate…

astro-ph.GA2015★ 12 cited

A low-luminosity type-1 QSO sample. V. Overluminous host spheroids and their excitation mechanisms

Gerold Busch, Nastaran Fazeli, Andreas Eckart +6

We present near-infrared (NIR) -band longslit spectra of eleven galaxies which are obtained with SOFI at the NTT (ESO). The galaxies are chosen from the low-luminosity type-1…

astro-ph.GA2015★ 12 cited

Herschel HIFI Observations of the Sgr A +50 km/s Cloud. Deep Searches for O2 in Emission and Foreground Absorption

Aa. Sandqvist, B. Larsson, Å. Hjalmarson +8

To date O2 has definitely been detected in only two sources, namely rho Oph A and Orion, reflecting the extremely low abundance of O2 in the interstellar medium. One of the sources…

astro-ph.GA2015★ 13 cited

Molecular gas in absorption and emission along the line of sight to W31C G10.62-0.38

Harvey Liszt, Maryvonne Gerin

We used the ARO 12m antenna to observe emission from the J=1-0 lines of carbon monoxide, \hcop\ and HNC and the J=2-1 line of CS toward and around the continuum peak used for absor…

astro-ph.GA2015★ 88 cited

Physical conditions in the central molecular zone inferred by H3+

Franck Le Petit, Maxime Ruaud, Emeric Bron +4

The H3+ molecule has been detected in many lines of sight within the central molecular zone (CMZ) with exceptionally large column densities and unusual excitation properties compar…

astro-ph.GA2015★ 51 cited

Spectroscopically resolved far-IR observations of the massive star-forming region G5.89--0.39

S. Leurini, F. Wyrowski, H. Wiesemeyer +9

The fine-structure line of [OI] at 63micron is an important diagnostic tool in different fields of astrophysics. However, our knowledge of this line relies on observations with low…

astro-ph.GA2015★ 6 cited

Challenging shock models with SOFIA OH observations in the high-mass star-forming region Cepheus A

A. Gusdorf, R. Guesten, K. M. Menten +13

OH is a key molecule in H2O chemistry, a valuable tool for probing physical conditions, and an important contributor to the cooling of shock regions. OH participates in the re-dist…

astro-ph.GA2015★ 125 cited

Velocity-resolved [CII] emission and [CII]/FIR Mapping along Orion with Herschel

J. R. Goicoechea, D. Teyssier, M. Etxaluze +22

We present the first 7.5'x11.5' velocity-resolved map of the [CII]158um line toward the Orion molecular cloud-1 (OMC-1) taken with the Herschel/HIFI instrument. In combination with…

astro-ph.GA2015★ 62 cited

Detection of extragalactic argonium, ArH, toward PKS~1830211

Holger S. P. Müller, Sébastien Muller, Peter Schilke +6

Argonium has recently been detected as a ubiquitous molecule in our Galaxy. Model calculations indicate that its abundance peaks at molecular fractions in the range of 1E-4 to 1E-3…

astro-ph.GA2015★ 113 cited

Molecular depletion times and the CO-to-H2 conversion factor in metal-poor galaxies

L. K. Hunt, S. Garcia-Burillo, V. Casasola +8

Tracing molecular hydrogen content with carbon monoxide in low-metallicity galaxies has been exceedingly difficult. Here we present a new effort, with IRAM 30-m observations of 12C…

astro-ph.GA2015★ 2 cited

The Multi-Phase Cold Fountain in M82 Revealed by a Wide, Sensitive Map of the Molecular ISM

Adam K. Leroy, Fabian Walter, Paul Martini +7

We present a wide area (~ 8 x 8 kpc), sensitive map of CO (2-1) emission around the nearby starburst galaxy M82. Molecular gas extends far beyond the stellar disk, including emissi…

astro-ph.GA2015★ 13 cited

Mapping the inner regions of the polar disk galaxy NGC4650A with MUSE

E. Iodice, L. Coccato, F. Combes +6

[abridged] The polar disk galaxy NGC4650A was observed during the commissioning of the MUSE at the ESO VLT to obtain the first 2D map of the velocity and velocity dispersion for bo…

astro-ph.GA2015★ 41 cited

Galactic interstellar filaments as probed by LOFAR and Planck

S. Zaroubi, V. Jelić, A. G. de Bruyn +13

Recent Low Frequency Array (LOFAR) observations at 115-175 MHz of a field at medium Galactic latitudes (centered at the bright quasar 3C196) have shown striking filamentary structu…

astro-ph.GA2015★ 41 cited

The nuclear gas disk of NGC 1566 dissected by SINFONI and ALMA

S. Smajić, L. Moser, A. Eckart +5

We present the results of near-infrared H- and K-band European Southern Observatory SINFONI integral field spectroscopy of the Seyfert galaxy NGC 1566. We investigate the central k…

astro-ph.GA2015★ 1 cited

The WiFeS S7 AGN survey: Current status and recent results on NGC 6300

J. Scharwächter, M. A. Dopita, P. Shastri +14

The Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7) is a targeted survey probing the narrow-line regions (NLRs) of a representative sample of ~140 nearby (z<0.02)…

astro-ph.GA2015★ 26 cited

The overmassive black hole in NGC 1277: new constraints from molecular gas kinematics

J. Scharwächter, F. Combes, P. Salomé +2

We report the detection of CO(1-0) emission from NGC 1277, a lenticular galaxy in the Perseus Cluster. NGC 1277 has previously been proposed to host an overmassive black hole (BH)…

astro-ph.GA2015★ 4 cited

The distribution of deuterated formaldehyde within Orion-KL

Cecile Favre, Edwin Bergin, Justin Neill +3

We report the first high angular resolution imaging (3.4\arcsec 3.0\arcsec) of deuterated formaldehyde (HDCO) toward Orion--KL, carried out with the Submillimeter Array (S…

astro-ph.GA2015★ 21 cited

The composite nature of Dust-Obscured Galaxies (DOGs) at z~2-3 in the COSMOS field: I. A Far-Infrared View

L. Riguccini, E. Le Floc'h, J. R. Mullaney +19

Dust-Obscured galaxies (DOGs) are bright 24 um-selected sources with extreme obscuration at optical wavelengths. They are typically characterized by a rising power-law continuum of…

astro-ph.GA2015★ 13 cited

Defying jet-gas alignment in two radio galaxies at z~2 with extended light profiles: Similarities to brightest cluster galaxies

C. Collet, N. P. H. Nesvadba, C. De Breuck +7

We report the detection of extended warm ionized gas in two powerful high-redshift radio galaxies, NVSS J210626-314003 at z=2.10 and TXS 2353-003 at z=1.49, that does not appear to…

astro-ph.GA2015★ 26 cited

A Herschel/HIFI Legacy Survey of HF and H2O in the Galaxy: Probing Diffuse Molecular Cloud Chemistry

P. Sonnentrucker, M. Wolfire, D. A. Neufeld +5

We combine Herschel observations of a total of 12 sources to construct the most uniform survey of HF and H2O in our Galactic disk. Both molecules are detected in absorption along a…

astro-ph.GA2015★ 78 cited

The jet and the disk of the HH 212 low-mass protostar imaged by ALMA: SO and SO2 emission

L. Podio, C. Codella, F. Gueth +8

To investigate the disk formation and jet launch in protostars is crucial to comprehend the earliest stages of star and planet formation. We aim to constrain the properties of the…