92 citations · 1.1k across the 50 of their papers we have counts for
22 papers · 1 filter
Molecular Superbubbles and Outflows from Starburst Galaxy NGC 2146
An-Li Tsai, Satoki Matsushita, Kouichiro Nakanishi +7
We present results from a deep (1 sigma = 5.7 mJy beam^{-1} per 20.8 km s^{-1} velocity channel) ^{12}CO(1-0) interferometric observation of the central 60" region of the nearby ed…
Correlation of the radio continuum, infrared, and CO molecular emissions in NGC 3627
R. Paladino, M. Murgia, A. Tarchi +2
We present new radio continuum observations, taken at 1.4 GHz with the Very Large Array, and new observations in the CO line, taken with the Plateau de Bure interferometer, of two…
New water masers in Seyfert and FIR bright galaxies. II
P. Castangia, A. Tarchi, C. Henkel +1
Recently, a relationship between the water maser detection rate and far infrared (FIR) flux density has been found as a result of a 22 GHz maser survey in a sample comprised of nor…
The innermost region of the water megamaser radio galaxy 3C403
A. Tarchi, A. Brunthaler, C. Henkel +3
The standard unified scheme of active galactic nuclei requires the presence of high column densities of gas and dust potentially obscuring the central engine. So far, few direct su…
The water megamaser in the merger system Arp299
A. Tarchi, P. Castangia, C. Henkel +1
We present preliminary results of an interferometric study of the water megamaser in the merger system Arp299. This system is composed of two main sources: IC694 and NGC3690. There…
The HI content of the recently discovered field dwarf galaxy APPLES1
A. Tarchi, J. Ott, A. Pasquali +3
We present observations in a search for neutral hydrogen associated with the recently detected field dwarf galaxy APPLES1, performed with the Parkes radiotelescope. The observed ra…
New H2O masers in Seyfert and FIR bright galaxies
C. Henkel, A. B. Peck, A. Tarchi +4
Extragalactic water vapor masers with 50, 1000, 1, and 230 solar (isotropic) luminosities were detected toward Mrk1066 (UGC2456), Mrk34, NGC3556 and Arp299, respectively. The inter…
Chandra Observation of the Starburst Galaxy NGC 2146
Tatsuya Inui, Hironori Matsumoto, Takeshi Go Tsuru +4
We present six monitoring observations of the starburst galaxy NGC 2146 using the Chandra X-ray Observatory. We have detected 67 point sources in the 8'.7 x 8'.7 field of view of t…
Kinematics of water masers in high-mass star forming regions
C. Goddi, L. Moscadelli, W. Alef +3
We have conducted multi-epoch EVN observations of the 22.2 GHz water masers towards four high-mass star forming regions (Sh 2-255 IR, IRAS 23139+5939, WB89-234, and OMC2). The (thr…
Probing the obscuring medium around active nuclei using masers: The case of 3C403
A. Tarchi, C. Henkel, M. Chiaberge +3
We report the first detection of a water megamaser in a radio-loud galaxy, 3C403, and present a follow-up study using the VLA. 3C403 has been observed as a part of a small sample o…
H2O megamasers: Accretion disks, jet interaction, outflows or massive star formation?
C. Henkel, J. A. Braatz, A. Tarchi +5
The 25 years following the serendipitous discovery of megamasers have seen tremendous progress in the study of luminous extragalactic HO emission. Single-dish monitoring and hi…
Dying Radio Galaxies In Clusters
M. Murgia, P. Parma, H. R. de Ruiter +2
We report the recent discovery of three `dying' radio galaxies belonging to the WENSS minisurvey sample: WNB1734+6407, WNB1829+6911 and WNB1851+5707. These sources have been select…
HI absorption at the center of NGC2146
A. Tarchi, A. Greve, A. B. Peck +4
We present 1.4 GHz HI absorption line observations towards the starburst in NGC2146, made with the VLA and MERLIN. The HI gas has a rotating disk/ring structure with column densiti…
Water vapor in the starburst galaxy NGC 253: A new nuclear maser?
C. Henkel, A. Tarchi, K. M. Menten +1
22 GHz water vapor emission was observed toward the central region of the spiral starburst galaxy NGC 253. Monitoring observations with the 100-m telescope at Effelsberg and measur…
Neutral hydrogen absorption at the center of NGC2146
A. Tarchi, A. Greve, A. B. Peck +4
We present 1.4 GHz HI absorption line observations towards the starburst in NGC2146, made with the VLA and MERLIN. The HI absorption has a regular spatial and regular velocity dist…
Extragalactic water masers in bright IRAS sources
A. Tarchi, C. Henkel, A. B. Peck +3
We report the results of a search for 22 GHz water maser emission in IRAS-bright galaxies, using the 100-m Effelsberg telescope. In particular, we present the details of four new m…
Discovery of a luminous water megamaser in the FRII radiogalaxy 3C403
A. Tarchi, C. Henkel, M. Chiaberge +1
We report the first detection of a water megamaser in a radio-loud galaxy, 3C403. This object has been observed as part of a small sample of FRIIs with evidence of nuclear obscurat…
Observations of extragalactic masers in bright IRAS sources
A. Tarchi, C. Henkel, A. B. Peck +2
We report the first results of an ongoing survey at 22 GHz with the 100-m Effelsberg telescope to search for water maser emission in bright IRAS sources. We have detected water vap…
The association between water kilomasers and compact radio sources in the starburst galaxy NGC2146
A. Tarchi, C. Henkel, A. B. Peck +1
We report the detection of 22 GHz water vapor emission toward the starburst galaxy NGC2146, made using the Effelsberg 100-m telescope. Interferometric observations with the Very La…
A search for radio supernovae and supernova remnants in the region of NGC1569's super star clusters
A. Greve, A. Tarchi, S. Huettemeister +4
We have used MERLIN, at 1.4 and 5 GHz, to search for radio supernovae (RSNe) and supernova remnants (SNRs) in the unobscured irregular dwarf galaxy NGC1569, and in particular in th…
The minor axis outflow of NGC 2146
A. Greve, N. Neininger, A. Tarchi +1
X-ray and optical observations have shown that the supernova explosions and stellar winds of the starburst in NGC 2146 produce an outflow of hot material along the minor axis. This…
Radio supernovae, supernova remnants and HII regions in NGC 2146 observed with MERLIN and the VLA
A. Tarchi, N. Neininger, A. Greve +5
We present a high-resolution 5-GHz radio continuum map of the starburst galaxy NGC 2146 made with MERLIN and the VLA, in a search of radio supernovae and supernova remnants expecte…