scholarly journals Molecular gas content of shell galaxies

2019 ◽  
Vol 630 ◽  
pp. A112 ◽  
Author(s):  
B. Mancillas ◽  
F. Combes ◽  
P.-A. Duc
Keyword(s):  
Gas Content ◽  
Molecular Gas ◽  
Shell Formation ◽  
Galaxy Interactions ◽  
The Third ◽  
Neutral Gas ◽  
History Of ◽  
Galaxy Center ◽  
Co Observations

Shells are fine stellar structures that are identified by their arc-like shapes around a galaxy. They are currently thought to be vestiges of galaxy interactions and/or mergers. The study of their number, geometry, stellar populations, and gas content can help us to derive the interaction or merger history of a galaxy. Numerical simulations have proposed a mechanism of shell formation through phase wrapping during a radial minor merger. Alternatively, there could be merely a space wrapping, when particles have not yet radially oscillated, but are bound by their radial expansion, or produce an edge-brightened feature. These can be distinguished because they are expected to keep a high radial velocity. While shells are first a stellar phenomenon, HI and CO observations have revealed neutral gas associated with shells. Some of the gas, the most diffuse and dissipative, is expected to be quickly driven to the center if it is traveling on nearly radial orbits. Molecular gas, which is distributed in dense clumps, is less dissipative, and may be associated with shells. It can then determine the shell velocity, which is too difficult to obtain from stars. We present here a search for molecular gas in nine shell galaxies with the IRAM-30 m telescope. Six of them are detected in their galaxy center, and in three galaxies, we clearly detect molecular gas in shells. The derived amount of molecular gas varies from 1.5 × 108 to 3.4 × 109 M⊙ in the shells. For two of them (Arp 10 and NGC 3656), the shells are characteristic of an oblate system. Their velocity is nearly systemic, and we conclude that these shells are phase wrapped. In the third galaxy (NGC 3934), the shells appear to participate in the rotation. Follow-up with higher spatial resolution is required to conclude.

scholarly journals CO Observations of Luminous IR Galaxy Mergers

1999 ◽  
Vol 186 ◽  
pp. 275-276
Author(s):  
Y. Gao ◽  
P.M. Solomon
Keyword(s):  
Gas Content ◽  
Molecular Gas ◽  
Galaxy Mergers ◽  
Galaxy Interactions ◽  
Luminous Infrared Galaxies ◽  
The Galaxy ◽  
Merging Process ◽  
Formation Efficiency ◽  
The Relationship ◽  
Co Observations

Luminous starbursts are observed to occur mostly as a result of a collision/merger in gas-rich galaxies, and most luminous infrared galaxies (LIGs) are indeed gas-rich mergers. In order to determine the relationship between the IR and molecular gas properties and the galaxy-galaxy interactions, we study LIG mergers in the intermediate merging process. We have observed nearly 20 LIG mergers and together with the CO data in the literature, we have found a correlation between the CO luminosity, LCO, and the projected separation of merger nuclei, RSep, in > 50 LIG mergers. The correlation suggests the molecular content is decreasing as merging advances and is better established with ~ 40 LIG mergers excluding ultraluminous ones, which resembles more a volume-limited, statistically complete sample of LIG mergers. In addition, an anti-correlation between LIR/LCO (the measure of star formation efficiency, SFE) and RSep is evident. One interpretation is that the molecular gas content of LIG mergers is being rapidly depleted due to the merger-induced starbursts and the increase of SFE as merging progresses.

Low-Grade Mucosa-Associated Lymphoid Tissue Lymphoma Involving the Kidney: Report of 3 Cases and Review of the Literature

2006 ◽  
Vol 130 (1) ◽  
pp. 86-89 ◽  
Author(s):  
Libo Qiu ◽  
Pamela D. Unger ◽  
Robert W. Dillon ◽  
James A. Strauchen
Keyword(s):  
Lymphoid Tissue ◽  
Cell Lymphoma ◽  
B Cell Lymphoma ◽  
Lymphoid Cells ◽  
Low Grade ◽  
The Third ◽  
First Case ◽  
Abundant Cytoplasm ◽  
History Of

Abstract Low-grade B-cell lymphoma of mucosa-associated lymphoid tissue involving the kidney is rare. We report a series of 3 cases. The first case occurred in an 83-year-old woman who presented with back pain. The second case was a 53-year-old man with a history of sarcoidosis who was found, in the course of evaluation of sarcoidosis, to have a right renal mass. The third case occurred in a 72-year-old man who had a history of periorbital mucosa–associated lymphoid tissue lymphoma and had been treated with surgery and radiation 1 year prior to this presentation. Histologically, all 3 patients showed infiltrate of uniform small-to-medium–sized lymphocytes with irregular nuclear contours and abundant cytoplasm resembling centrocytes or monocytoid lymphoid cells. The first patient received chemotherapy without complications. The second patient underwent a partial nephrectomy and was asymptomatic at the subsequent follow-up. The third patient developed a pulmonary embolism following nephrectomy, and further follow-up is not available.

scholarly journals Methylmalonic Acidemia – Cause of Recurrent Neonatal Death and Its Social Implications

2014 ◽  
Vol 34 (2) ◽  
pp. 150-153
Author(s):  
Vasikarla Madhavi ◽  
Deepak Kumar Sharma ◽  
Srinivas Murki ◽  
Tejo Pratap
Keyword(s):  
Short Chain Fatty Acid ◽  
Neonatal Period ◽  
Chain Fatty Acid ◽  
Methylmalonic Acidemia ◽  
Acid Oxidase ◽  
Oxidase Deficiency ◽  
The Third ◽  
History Of ◽  
One Year

Mr and Mrs R, non-consanguineous couple had history of all their children during neonatal period. First two neonates were normal at birth, then presented with lethargy, vomiting and decreased acceptance of feeds. Both the babies expired after birth without being investigated for cause of death. The third neonate was investigated for inborn error of metabolism and found to be affected with methylmalonic acidemia. The couple departed away inspite of extensive counselling. In the fourth pregnancy antenatally fetus was diagnosed as carrier case of methylmalonic acidemia and short chain fatty acid oxidase deficiency. The fourth baby was normal and was in follow up till one year age. DOI: http://dx.doi.org/10.3126/jnps.v34i2.10577 J Nepal Paediatr Soc 2014;34(2):150-153 

scholarly journals Central molecular zones in galaxies: 12CO-to-13CO ratios, carbon budget, and X factors

2020 ◽  
Vol 635 ◽  
pp. A131 ◽  
Author(s):  
F. P. Israel
Keyword(s):  
Gas Phase ◽  
Gas Content ◽  
Molecular Gas ◽  
Nearby Galaxy ◽  
Individual Values ◽  
Elemental Abundances ◽  
Hydrogen Column Density ◽  
Galaxy Center ◽  
The Mean ◽  
Co Emission

We present ground-based measurements of 126 nearby galaxy centers in 12CO and 92 in 13CO in various low-J transitions. More than 60 galaxies were measured in at least four lines. The average relative intensities of the first four J 12CO transitions are 1.00:0.92:0.70:0.57. In the first three J transitions, the average 12CO-to-13CO intensity ratios are 13.0, 11.6, and 12.8, with individual values in any transition ranging from 5 to 25. The sizes of central CO concentrations are well defined in maps, but poorly determined by multi-aperture photometry. On average, the J = 1−0 12CO fluxes increase linearly with the size of the observing beam. CO emission covers only a quarter of the HI galaxy disks. Using radiative transfer models (RADEX), we derived model gas parameters. The assumed carbon elemental abundances and carbon gas depletion onto dust are the main causes of uncertainty. The new CO data and published [CI] and [CII] data imply that CO, C°, and C+ each represent about one-third of the gas-phase carbon in the molecular interstellar medium. The mean beam-averaged molecular hydrogen column density is N(H2) = (1.5 ± 0.2)×1021 cm−2. Galaxy center CO-to-H2 conversion factors are typically ten times lower than the “standard” Milky Way X° disk value, with a mean X(CO) = (1.9 ± 0.2)×1019 cm−2/K km s−1 and a dispersion 1.7. The corresponding [CI]-H2 factor is five times higher than X(CO), with X[CI] = (9 ± 2)×1019 cm−2/K km s−1. No unique conversion factor can be determined for [CII]. The low molecular gas content of galaxy centers relative to their CO intensities is explained in roughly equal parts by high central gas-phase carbon abundances, elevated gas temperatures, and large gas velocity dispersions relative to the corresponding values in galaxy disks.

scholarly journals A case report on placental chorioangioma

2021 ◽  
Vol 10 (12) ◽  
pp. 4555
Author(s):  
Kalyani P. Barde ◽  
Gautam S. Aher ◽  
Urmila G. Gavali
Keyword(s):  
Case Report ◽  
Preterm Labour ◽  
Second Trimester ◽  
Perinatal Complications ◽  
Amniotic Fluid Index ◽  
Solitary Nodule ◽  
The Third ◽  
History Of ◽  
Multiple Nodules

Chorioangioma is the term used to describe an abnormal proliferation of vessels arising from chorionic tissue, which is most commonly observed in the third, and less frequently in the second trimester of pregnancy as a solitary nodule or, less commonly, as multiple nodules. We here report a case of placental chorioangioma which presented as a case of preterm labour. 21 year old primigravida presented to us at 26 weeks of gestation with history of PV leak and pain in abdomen. Ultrasound showed a single live foetus corresponding to 24-26 weeks of gestation with amniotic fluid index (AFI): 5 cm (oligohydramnios) there was evidence of 58×42 mm heterogeneously hypoechoic lesion noted over placenta likely s/o chorioangioma. Patient went into spontaneous preterm labour on day 5 and delivered vaginally. Placenta weighted 700 gm. A globular mass of size 6×7 cm was attached to foetal surface of placenta with a pedicle with confirmed the finding of ultrasonography. Placental chorioangioma is associated with high rates of perinatal complications. Most complications may appear early and delivery is problematic due to prematurity. Thus better prenatal investigations and regular follow up is required for early diagnosis and treatment.

scholarly journals Topographical Irregularity and Keratoconic Findings in Five Siblings and their Parents

2014 ◽  
Vol 3 (3) ◽  
pp. 130-135
Author(s):  
Jose M González-Méijome ◽  
Antonio Queiros ◽  
Alberto Diaz-Rey ◽  
José Salgado-Borges ◽  
Sofia C Peixoto-de-Matos ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Refractive Error ◽  
Case Series ◽  
Advanced Case ◽  
The Third ◽  
History Of ◽  
Ophthalmologic Examination ◽  
Degrees Of Severity ◽  
Irregular Astigmatism

ABSTRACT Purpose To report the clinical features of five siblings, four of them with positive diagnostic of keratoconus in different degrees of severity as well as their parents findings. Materials and methods Seven elements of the same family, five young siblings (2 males, 3 females), and their parents were screened for potential keratoconic signs. Topographic data from 60 normal eyes are also reported for comparison purposes. Complete ophthalmologic examination including biomicroscopic, topographic and refractive examination. Main outcome measures included biomicroscopic findings, refractive error and visual acuity, simulated keratometry, corneal eccentricity, indices of asymmetry and regularity. Results The more advanced case was present in the left eye of a male member, needing a rigid gas permeable lens to correct irregular astigmatism. Another brother also presented bilateral mild to moderate keratoconus with no apparent vision complaints. The third case diagnosed was one sister with history of monthly disposable soft toric lens to compensate a presumed initially regular astigmatism two years before. The remaining two cases being the older sister and one of the younger sisters presented the less noticeable signs, with confirmation of the pathology only in one of them and warranting a close follow- up of both due to the asymmetric corneal topography between both eyes as well as between the flatter superior and steeper inferior corneal areas. Conclusion This is the first reported case series involving diagnosis of keratoconus or atypical corneal topographies in several young siblings and their parents. Further evaluation of this and other cases with similar presentations might help to gain a deeper understanding on the potential genetic paths of keratoconus. How to cite this article González-Méijome JM, Peixoto-de- Matos SC, Soares A, Queirós A, Díaz-Rey A, Salgado-Borges J. Topographical Irregularity and Keratoconic Findings in Five Siblings and their Parents. Int J Kerat Ect Cor Dis 2014;3(3):130-135.

scholarly journals Hemangioblastoma in the Lung: Metastatic or Primary Lesions?

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Li Lu ◽  
Peter A. Drew ◽  
Anthony T. Yachnis
Keyword(s):  
Case Report ◽  
Posterior Fossa ◽  
Surgical Excision ◽  
Metastatic Tumor ◽  
Lung Nodules ◽  
Pathological Study ◽  
The Third ◽  
History Of ◽  
Multiple Lung Nodules

Hemangioblastoma primarily occurs in the CNS, most commonly in the posterior fossa. Extracranial locations are less common, and metastatic tumor involving the lung is exceedingly rare with only three cases previously reported. Two were autopsy studies in patients who died of complications of the CNS hemangioblastomas in 1943 and 1981, and the third was mentioned in a case report addendum providing follow-up information on hepatic hemangioblastoma in 1991. We report a case of a 48-year-old man who presented with multiple lung nodules treated by surgical excision. Pathological study revealed features classic for hemangioblastoma. The patient had a remote history of hemangioblastomas having been excised from the posterior fossa 7 and 20 years previously. This report details a fourth case of metastatic pulmonary hemangioblastoma. It is the first report on surgically resected hemangioblastomas from the lung of a living patient with histological and immunohistochemical characterization.

scholarly journals Spotting high-z molecular absorbers using neutral carbon

2018 ◽  
Vol 612 ◽  
pp. A58 ◽  
Author(s):  
P. Noterdaeme ◽  
C. Ledoux ◽  
S. Zou ◽  
P. Petitjean ◽  
R. Srianand ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Sloan Digital Sky Survey ◽  
Gas Content ◽  
Molecular Gas ◽  
Strongly Correlated ◽  
Neutral Gas ◽  
Sky Survey ◽  
Complete Survey ◽  
Physical And Chemical ◽  
Gas Conversion

While molecular quasar absorption systems provide unique probes of the physical and chemical properties of the gas as well as original constraints on fundamental physics and cosmology, their detection remains challenging. Here we present the results from a complete survey for molecular gas in thirty-nine absorption systems selected solely upon the detection of neutral carbon lines in Sloan Digital Sky Survey (SDSS) spectra, without any prior knowledge of the atomic or molecular gas content. H2 is found in all twelve systems (including seven new detections) where the corresponding lines are covered by the instrument setups and measured to have logN(H2) ≳ 18, indicating a self-shielded regime. We also report seven CO detections (7/39) down to logN(CO)  ~ 13.5, including a new one, and put stringent constraints on N(CO) for the remaining 32 systems. N(CO) and N(C I) are found to be strongly correlated with N(CO)/N(C I) ~ 1/10. This suggests that the C I-selected absorber population is probing gas deeper than the H I–H2 transition in which a substantial fraction of the total hydrogen in the cloud is in the form of H2. We conclude that targeting C I-bearing absorbers is a very efficient way to find high-metallicity molecular absorbers. However, probing the molecular content in lower-metallicity regimes as well as high-column-density neutral gas remains to be undertaken to unravel the processes of gas conversion in normal high-z galaxies.

scholarly journals Minimum 6-Year Follow-Up of Arthroscopic Medial Reefing for Patellar Instability

2017 ◽  
Vol 5 (2_suppl2) ◽  
pp. 2325967117S0005
Author(s):  
Osman Civan ◽  
Mesut Sançmış ◽  
Nazım Topçuoğlu ◽  
Alpay Merter Özenci
Keyword(s):  
Patellar Instability ◽  
Young Patients ◽  
Skin Incision ◽  
Viable Option ◽  
The Third ◽  
Common Complaint ◽  
History Of ◽  
Anterior Knee

Introduction: Purpose of this study was to evaluate the results of arthroscopic medial reefing for patellar instability at long term. Materials-Methods: 15 patients (16 knees) with patellar instability were consecutively treated by arthroscopic medial reefing between 2005- 2010. At final follow-up 11 patients (12 knees) were available to evaluate. Average age was 18,6 (range, 12-37 years). Average follow-up was 90 months (range, 71-115). History of patellar dislocation episode was reported by all patients. Arthroscopic medial reefing was applied through three standard portals. At least 3 sutures were tied according to medial laxity. Post-operatively all patients were allowed to bear weight on the operated leg immediately and full knee flexion was allowed by the third week. At last follow-up patients were evaluated according to the Tegner and Lysholm scales. Paired t test was used to detect the statistical differences and p<0.05 was considered significant. Results: Two patients reported re-dislocations after the operation. Re-dislocation rate was 16.6% (2 in 12 knees). In general, patients reported significant improvement in pain, swelling, crepitus, and physical activity. The most common complaint was the anterior knee pain. The average pre and post-operative Tegner scores were 3.66 and 4.0, respectively. The average preoperative Lysholm score was 72 and postoperatively improved to 87.8 (p=0. 017). Discussion: Arthroscopic medial reefing for patellar instability is a viable option for young patients with ligamentous insufficiency without major bony abnormalities. The most significant advantages are that the epiphyseal plates are protected in young patients, no skin incision applied, and no autografts are harvested.

scholarly journals What does the murder of a journalist, and follow-up events, tell us about freedom of the press and politics in a European country?

2019 ◽  
Vol 12 (1) ◽  
pp. 25-43
Author(s):  
Andrej Školkay
Keyword(s):  
Prime Minister ◽  
Societal Change ◽  
Political Actor ◽  
Ideal Model ◽  
The Third ◽  
The Press ◽  
History Of ◽  
The Media

In February 2018, Slovakia’s long history of the absence of journalist murder cases ended, when a young investigative journalist, Jan Kuciak, and his fiancee were murdered in their home. While previous cases of the disappearance of journalists cannot be totally dissociated from the possibilities of murder, a lack of evidence qualified this case as the first. The cascade of events which followed further emphasise its importance. Prime Minister Robert Fico was forced to resign. Resignations of the Minister of Culture, almost immediately, and two Ministers of the Interior followed. Subsequently, the third nominee for the position of Minister of the Interior was not approved by the President. These events were largely influenced by the media and public protests on the streets — some demonstrations were larger than those conducted during anti-communist protests in late 1989. Consequently, the role of the media as the key political actor following the murder of the journalist, represents an ideal model for analysing the influence of media in political and societal change. 

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