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相关论文: Discovery of the Tadpole Molecular Cloud near the …

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We have discovered an energetic high-velocity compact cloud CO$-$0.31+0.11 in the central molecular zone of our Galaxy. CO$-$0.31+0.11 is located at a projected distance of $\sim 45$ pc from the Galactic nucleus Sgr A$^*$. It is…

Tadpole galaxies, with a bright peripheral clump on a faint tail, are morphological types unusual in the nearby universe but very common early on. Low mass local tadpoles were identified and studied photometrically in a previous work, which…

宇宙学与河外天体物理 · 物理学 2015-06-15 J. Sanchez Almeida , C. Munoz-Tunon , D. M. Elmegreen , B. G. Elmegreen , J. Mendez-Abreu

We report the detection of a peculiar molecular cloud, CO 0.02-0.02, lying about 5' Galactic-east from the center of the Galaxy. (12)CO images taken with NRO 45 m telescope showed that it is relatively compact (about 3x4 pc^2) as well as…

天体物理学 · 物理学 2009-10-31 T. Oka , G. J. White , T. Hasegawa , F. Sato , M. Tsuboi , A. Miyazaki

Tadpole galaxies have a head-tail shape with a large clump of star formation at the head and a diffuse tail or streak of stars off to one side. We measured the head and tail masses, ages, surface brightnesses, and sizes for 66 tadpoles in…

宇宙学与河外天体物理 · 物理学 2015-05-19 Bruce G. Elmegreen , Debra Meloy Elmegreen

We report multi-wavelength observations of the far-infrared source IRAS 20324+4057, including high-resolution optical imaging with HST, and ground-based near-infrared, millimeter-wave and radio observations. These data show an extended,…

太阳与恒星天体物理 · 物理学 2015-06-03 R. Sahai , M. R. Morris , M. J. Claussen

This paper reports the discovery of a helical molecular cloud in the central molecular zone (CMZ) of our Galaxy. This "pigtail" molecular cloud appears at (l, b, V_LSR) ~ (-0.7deg, +0.0deg, -70 to -30 km/s), with a spatial size of ~ (20…

星系天体物理 · 物理学 2015-06-05 Shinji Matsumura , Tomoharu Oka , Kunihiko Tanaka , Makoto Nagai , Kazuhisa Kamegai , Tetsuo Hasegawa

Tadpole Galaxies look like a star forming head with a tail structure to the side. They are also named cometaries. In a series of recent works we have discovered a number of issues that lead us to consider them extremely interesting targets.…

星系天体物理 · 物理学 2014-04-22 Casiana Munoz-Tunon , Jorge Sanchez Almeida , Debra M. Elmegreen , Bruce G. Elmegreen

We report the discovery of multiple compact molecular features exhibiting extremely broad velocity widths toward the W44 molecular cloud. ALMA CO $J$=3--2 data reveal eight ``Petit--Bullets'' surrounding the previously known ``Bullet.''…

星系天体物理 · 物理学 2026-01-21 Momoko Makita , Tomoharu Oka , Shiho Tsujimoto , Tatsuya Kotani

CO--0.40--0.22 is a peculiar molecular cloud that is compact and has an extraordinary broad velocity width. It is found in the central molecular zone of our Galaxy. In this direction, there is another cloud with an H$_2$O maser spot at a…

星系天体物理 · 物理学 2017-05-10 Yuhei Iwata , Haruka Kato , Daisuke Sakai , Tomoharu Oka

Using an absorption line from the metastable (J, K) = (3, 3) level of H3+ together with other lines of H3+ and CO observed along several sightlines, we have discovered a vast amount of high temperature (T ~ 250 K) and low density (n ~ 100…

天体物理学 · 物理学 2016-08-30 Takeshi Oka , T. R. Geballe , Miwa Goto , Tomonori Usuda , B. J. McCall

We mapped the high-velocity compact cloud CO-0.40-0.22 in 21 molecular lines in the 3 mm band using the Nobeyama Radio Observatory 45 m radio telescope. Eighteen lines were detected from CO-0.40-0.22. The map of each detected line shows…

星系天体物理 · 物理学 2016-01-13 Tomoharu Oka , Reiko Mizuno , Kodai Miura , Shunya Takekawa

We have mapped two molecular clouds at (l, b) = (3.2 degrees, + 0.3 degrees) and (l, b) = (5.4 degrees, -0.5 degrees) in 21-cm line and continuum emission. These clouds show unusually large velocity dispersions of more than 100 km/s (FWHM)…

天体物理学 · 物理学 2015-06-24 Harald Riffert , Pawan Kumar , W. K. Huchtmeier

We present 1"-resolution ALMA observations of the circumnuclear disk (CND) and the environment around SgrA*. The images unveil the presence of small spatial scale CO (J=3-2) molecular "cloudlets" within the central pc of the Milky Way,…

The high velocity dispersion compact cloud CO-0.30-0.07 is a peculiar molecular clump discovered in the central moleculr zone of the Milky Way, which is characterized by its extremely broad velocity emissions ($\sim 145\ \rm{km s^{-1}}$)…

星系天体物理 · 物理学 2023-06-28 Kunihiko Tanaka , Makoto Nagai , Kazuhisa Kamegai , Tomoharu Oka

Based on high-latitude molecular clouds with highly accurate distance estimates taken from the literature, we have redetermined the parameters of their spatial orientation. This system can be approximated by a 350x235x140 pc ellipsoid…

星系天体物理 · 物理学 2016-07-04 V. V. Bobylev

The review is devoted to the Radcliffe Wave recently discovered by Alves et al. from the analysis of molecular clouds. These authors singled out a narrow chain of molecular clouds, elongated almost in one line, located at an inclination of…

星系天体物理 · 物理学 2023-01-25 V. V. Bobylev , A. T. Bajkova , Yu. N. Mishurov

We report the discovery of molecular gas streams orbiting around an invisible massive object in the central region of our Galaxy, based on the high-resolution molecular line observations with the Atacama Large Millimeter/submillimeter Array…

星系天体物理 · 物理学 2019-01-23 Shunya Takekawa , Tomoharu Oka , Yuhei Iwata , Shiho Tsujimoto , Mariko Nomura

The Milky Way lies in a thin plane, the Local Sheet, a part of a wall bounding the Local Void lying toward the north supergalactic pole. Galaxies with accurate distances both above and below this supergalactic equatorial plane have…

星系天体物理 · 物理学 2019-07-31 Gagandeep S. Anand , R. Brent Tully , Luca Rizzi , Edward J. Shaya , Igor D. Karachentsev

We report the discovery of the molecular cloud whose kinematic distance is the largest in the Galaxy at the present moment, named G213.042$+$0.003, at $l =$ 213.042$^\circ$ and $b =$ 0.003$^\circ$ in the $^{12}$CO($J =$ 1-0) line using the…

A population of discrete HI clouds in the halo of the inner Galaxy has been discovered in 21cm observations made with the Green Bank Telescope. The halo clouds are seen up to 1.5 kpc from the Galactic plane at many longitudes. Their…

天体物理学 · 物理学 2009-11-07 Felix J. Lockman
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