Astrophysical Bulletin最新文献_第9页

Star Formation in Lenticular Galaxies with MaNGaL Mapper 利用MaNGaL映射器研究透镜星系中的恒星形成

IF 1.2 4区物理与天体物理

Astrophysical Bulletin Pub Date : 2023-11-07 DOI: 10.1134/S1990341323700153

O. K. Sil’chenko, A. V. Moiseev, D. V. Oparin, E. A. Maleeva, I. S. Proshina

{"title":"Star Formation in Lenticular Galaxies with MaNGaL Mapper","authors":"O. K. Sil’chenko, A. V. Moiseev, D. V. Oparin, E. A. Maleeva, I. S. Proshina","doi":"10.1134/S1990341323700153","DOIUrl":"10.1134/S1990341323700153","url":null,"abstract":"We present results of studying star-forming rings in six lenticular galaxies obtained with the narrow-band photometry in the H(alpha) and [N II] (lambda) 6583 emission lines using the MaNGaL tunable-filter mapper at the 2.5-m telescope of CMO of SAI MSU. The gas excitation mechanism estimated from the relation of the H(alpha) and [N II] (lambda) 6583 line fluxes occurred to be inhomogeneous along the ring: three outer rings have narrow segments of position angles, in which shocks waves dominate in the ring. Since the nature of the rings is most likely accretionary, the location of shock excitation in the outer rings indicates the direction of arrival of the external gas inflow. Star formation events in the rings are probably quite brief and effective: we mainly observe homogeneous sub-solar metallicity of the gas close to the level of local saturation of the gas chemical evolution in the star formation process and switching of the localization of the star-forming sites on a time scale of about 100 Myr. In NGC 932, we have caught the very beginning of the external gas accretion: there is still little of it in the galaxy, and the metallicity of the gas in the star-forming ring has not yet reached saturation.","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"78 3","pages":"304 - 324"},"PeriodicalIF":1.2,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71908696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphology and Kinematics of Interstellar Matter in the Vicinity of Young Stars ZZ Tau and ZZ Tau IRS 年轻恒星ZZ-Tau和ZZ-Tau IRS附近星际物质的形态和运动学

IF 1.2 4区物理与天体物理

Astrophysical Bulletin Pub Date : 2023-11-07 DOI: 10.1134/S1990341323700116

A. V. Dodin, S. G. Zheltoukhov, S. A. Lamzin, S. A. Potanin, B. S. Safonov, I. A. Strakhov, A. M. Tatarnikov

{"title":"Morphology and Kinematics of Interstellar Matter in the Vicinity of Young Stars ZZ Tau and ZZ Tau IRS","authors":"A. V. Dodin, S. G. Zheltoukhov, S. A. Lamzin, S. A. Potanin, B. S. Safonov, I. A. Strakhov, A. M. Tatarnikov","doi":"10.1134/S1990341323700116","DOIUrl":"10.1134/S1990341323700116","url":null,"abstract":"The morphology and kinematics of the matter in the vicinity of\u0000young stars ZZ Tau and ZZ Tau IRS are studied. It has been found\u0000that the emission nebula (the H(alpha) filament) located\u0000southwest of these stars, as well as the Herbig–Haro object\u0000HH 393 projected onto it are moving away from ZZ Tau and\u0000ZZ Tau IRS with a radial velocity of about 50 km s({}^{-1}). On the\u0000inner edge of the western part of the H(alpha) filament, there is\u0000a cooler filament emiting in the molecular hydrogen line\u0000((lambda=2.12) (mu)m) and in the dust continuum. In the\u0000northeastern part of the studied region, a new Herbig–Haro object\u0000is discovered and assigned the number HH 1232. The presence of\u0000several more new emission nebulae is suspected. The electron\u0000density in the studied regions of the H(alpha) filament, as well\u0000as HH 393 and HH 1232 (N_{e}lesssim 100) cm({}^{-3}). Arguments are\u0000presented in favor of the fact that the dusty disk wind has\u0000created a gas-and-dust nebula around ZZ Tau IRS, along the\u0000symmetry axis of which there is a jet moving in the direction of\u0000HH 393.","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"78 3","pages":"364 - 371"},"PeriodicalIF":1.2,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71908733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gas Kinematics in the Magellanic-Type Galaxy NGC 7292 麦哲伦型星系NGC 7292的气体运动学

IF 1.2 4区物理与天体物理

Astrophysical Bulletin Pub Date : 2023-11-07 DOI: 10.1134/S1990341323700104

A. S. Gusev, A. V. Moiseev, S. G. Zheltoukhov

引用次数: 0

Near Infrared View on the Photo-Dissociation Regions S 255, S 257, NGC 7538, and S 140 光解离区s255、s257、ngc7538和s140的近红外观测

IF 1.2 4区物理与天体物理

Astrophysical Bulletin Pub Date : 2023-11-07 DOI: 10.1134/S199034132360014X

M. S. Kirsanova, A. M. Tatarnikov, P. A. Boley, D. S. Wiebe, N. A. Maslennikova, A. A. Tatarnikov

{"title":"Near Infrared View on the Photo-Dissociation Regions S 255, S 257, NGC 7538, and S 140","authors":"M. S. Kirsanova, A. M. Tatarnikov, P. A. Boley, D. S. Wiebe, N. A. Maslennikova, A. A. Tatarnikov","doi":"10.1134/S199034132360014X","DOIUrl":"10.1134/S199034132360014X","url":null,"abstract":"We performed photometric observations of the S 255, S 257, S 140, NGC 7358, and the Orion Bar photo-dissociation regions (PDRs) at 2 (mu)m using narrow-band filters centered on the Br(gamma), H({}_{2}), and [Fe II] lines, as well as the narrow-band (K_{textrm{cont}}) and the broad-band (H) filters for continuum subtraction. The observations were done with the 2.5-m telescope of the SAI Caucasian Mountain Observatory and the near-infrared camera and spectrograph ASTRONIRCAM. We find several high-density arc-like structures in the Br(gamma) and [Fe II] images of the ionized gas in NGC 7538 and extended shells and arcs visible through the H({}_{2}) emission. The H ionization front and H({}_{2}) dissociation front are merged in NGC 7538. In S 255 and S 257 we detected only Br(gamma) emission from the H II regions and bright H({}_{2}) emission from the PDRs. The projected distance between the H ionization and H({}_{2}) dissociation fronts is approximately 0.3–0.4 pc, which cannot be explained using models of a uniform medium. Most probably, the ionized and neutral gas in these PDRs is clumpy. The H I-to-H({}_{2}) transitions in the NGC 7538, S 255, S 257 and S 140 PDRs are gradual with no sharp borders. This conclusion also agrees with the suggestion of a clumpy medium.","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"78 3","pages":"372 - 383"},"PeriodicalIF":1.2,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71908735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic Fields of New CP Stars Discovered with Kepler Mission Data 用开普勒任务数据发现的新CP恒星的磁场

IF 1.2 4区物理与天体物理

Astrophysical Bulletin Pub Date : 2023-07-17 DOI: 10.1134/S1990341323020128

I. A. Yakunin, E. A. Semenko, I. I. Romanyuk, A. V. Moiseeva, V. N. Aitov

引用次数: 0

Speckle Interferometry with CMOS Detector 用CMOS探测器进行散斑干涉测量

IF 1.2 4区物理与天体物理

Astrophysical Bulletin Pub Date : 2023-07-17 DOI: 10.1134/S1990341323020104

I. A. Strakhov, B. S. Safonov, D. V. Cheryasov

引用次数: 1

Searching for Brown Dwarfs in Large Photometric Surveys: WISE, 2MASS, and DES 在大型光度调查中寻找褐矮星:WISE, 2MASS和DES

IF 1.2 4区物理与天体物理

Astrophysical Bulletin Pub Date : 2023-07-17 DOI: 10.1134/S1990341323020013

A. S. Avdeeva, S. V. Karpov, O. Yu. Malkov

引用次数: 0

Kinematics of the Galactic Disk Based on Open Cluster Data 基于疏散星团数据的银河盘运动学

IF 1.2 4区物理与天体物理

Astrophysical Bulletin Pub Date : 2023-07-17 DOI: 10.1134/S1990341323020049

M. E. Popova

引用次数: 0

Study of the Microquasar Cygnus X-3 with the RATAN-600 Radio Telescope in Multi-Azimuth Observing Mode RATAN-600射电望远镜多方位观测模式下天鹅座X-3微类星体的研究

IF 1.2 4区物理与天体物理

Astrophysical Bulletin Pub Date : 2023-07-17 DOI: 10.1134/S1990341323020116

S. A. Trushkin, A. V. Shevchenko, N. N. Bursov, P. G. Tsybulev, N. A. Nizhel’skii, A. N. Borisov, A. A. Kudryashova

{"title":"Study of the Microquasar Cygnus X-3 with the RATAN-600 Radio Telescope in Multi-Azimuth Observing Mode","authors":"S. A. Trushkin, A. V. Shevchenko, N. N. Bursov, P. G. Tsybulev, N. A. Nizhel’skii, A. N. Borisov, A. A. Kudryashova","doi":"10.1134/S1990341323020116","DOIUrl":"10.1134/S1990341323020116","url":null,"abstract":"We have been carrying out daily observations of bright microquasars at 1.2–20 GHz with the Northern sector of the RATAN-600 radio telescope for more than ten years. During the 2019–2021 observations we detected bright flares, which we call giant flares because fluxes reach record levels—above 20 Jy—during these events. In this paper we report the results of intraday variations of the microquasar Cygnus X-3 in multi-azimuth observations made with the ‘‘Southern sector with a flat-sheet reflector’’ during giant flares of Cygnus X-3. These were the first such observations made simultaneously at several frequencies on a short time scale (10 minutes). Observational data consists of 31 measurement made within (pm)2.7 hours of the culmination of the object. We are the first to discover the evolution of the spectrum of the flare emission of Cygnus X-3 on a time scale comparable to the orbital period of the binary. The measurement data allowed us to determine the temporal and spectral parameters of radio emission, which are typical for synchrotron flare emission in relativistic jets. Evolution of the radio emission of X-ray binaries on short time scales is a key to understanding the formation of jet outbursts in the process of mass accretion of the matter of the donor star onto the relativistic object.","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"78 2","pages":"225 - 233"},"PeriodicalIF":1.2,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4681167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of the Activity of 11 K-type Dwarfs with Planets in the Habitable Zone 11颗宜居带行星的k型矮星活动分析

IF 1.2 4区物理与天体物理

Astrophysical Bulletin Pub Date : 2023-07-17 DOI: 10.1134/S1990341323020086

I. S. Savanov

{"title":"Analysis of the Activity of 11 K-type Dwarfs with Planets in the Habitable Zone","authors":"I. S. Savanov","doi":"10.1134/S1990341323020086","DOIUrl":"10.1134/S1990341323020086","url":null,"abstract":"We report the results of a study of spot activity manifestations in 11 K-type dwarfs with established planets in the habitable zone according to the data from the Kepler space telescope archive acquired during 90-day long Q3-set observations. We found that the spot area (A) on the surface of K-type dwarfs of our list is greater than the characteristic solar value, but is comparable to the maximum levels observed for the Sun, except for the active star KIC 9351316 with (A=7588) MSH. We performed a detailed study of the K-type dwarf KIC 5938970 (Kepler-1540) with flare activity higher than that of the Sun and flare energy (log E) spanning the 32.95–34.48 interval. We estimated the rotation period of the star, (P=15overset{textrm{d}}{.}1447), and its parameter (DeltaOmega=0.024pm 0.007) rad/day. Based on the Kamogata Wide-field Survey data (99 (V)-band magnitude estimates in 3310 days) we conclude that photometric variations include cyclic changes and a weak monotonic brightness increase. The characteristic periods of possible cycles are equal to 2.8 and 4.4 years. Our study of the star’s activity in about half of the currently known K-type dwarfs with planets in the habitable zone (11 objects among 17 stars in the complete list) based on high-precision observations made with the Kepler telescope revealed certain activity manifestations (high flare activity in one star, high spot activity in another, etc.). We conclude that a detailed study of activity manifestations in each particular star is highly desirable when studying planetary systems of K-type stars including planets in the habitable zone.","PeriodicalId":478,"journal":{"name":"Astrophysical Bulletin","volume":"78 2","pages":"200 - 208"},"PeriodicalIF":1.2,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4685439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0