Lupus Deutscher Name: Wolf Lup Kulmination Um

Total Page：16

File Type：pdf, Size：1020Kb

Lupus Deutscher Name: Wolf Lup Kulmination Um

Lateinischer Name: Deutscher Name: Lup Lupus Wolf Kulmination um Atlas (2000.0) Karte Mitternacht: Cambridge Star 9. Mai 17, 18 Atlas 21, 22, Sky Atlas 25 Deklinationsbereich: -55° ... -30° Fläche am Himmel: 334° 2 Benachbarte Sternbilder: Cen Cir Hya Lib Nor Sco Mythologie und Geschichte: Einer Erzählung von Eratostenes nach handelt es sich bei Lupus um den blutrünstigen König Lykaon von Arkadien. Er soll fast alle seine zahlreichen Söhne umgebracht haben. Zeus hatte mit Lykaons Tochter einen Sohn namens Arkas. Eines Tages war Zeus im Palast des Lykaon zum Essen eingeladen. Um zu prüfen, ob der Gast tatsächlich der mächtige Zeus sei, zerstückelte Lykaon seinen Schwiegersohn Arkas und setzte ihn Zeus als Mahlzeit vor. Zeus erkannte jedoch sofort das Fleisch seines armen Sohnes und warf in rasendem Zorn den Tisch um, tötete Lykaons Söhne mit einem Blitz und verwandelte Lykaon selbst in einen Wolf. Dann fügte Zeus die Teile seines Sohnes wieder zusammen und übergab ihn der Pleiade Maia , die ihn aufzog. Der Zentaur Chiron hält nun in alle Ewigkeit den in einen Wolf verwandelten Lykaon in Schach. [bk20 ] Nach [bk7 ] sahen die Griechen und Römer in Lupus ein nicht näher bezeichnetes wildes Tier, das von Centaurus den Göttern geopfert werden sollte. Die Identifizierung mit einem Wolf sei anscheinend erst im Zeitalter der Renaissance erfolgt. Sternbild: Das Sternbild Lupus steht in einem Ausläufer des Milchstraßenbandes, südlich von Libra , den Scheren des Skorpion und östlich von Centaurus . Die Fläche des Sternbildes beträgt 334 Quadratgrad und das Zentrum kulminiert jeweils etwa am 9. Mai um Mitternacht. [bk9 , bk15 ] Interessante Objekte: Hellste Sterne: alpha Lupi beta Lup gamma Lup epsilon Lup eta Lup kappa Lup my Lup xi Lup pi Lup Offene Sternhaufen: NGC 5593 NGC 5749 NGC 5822 Kugelsternhaufen: NGC 5824 NGC 5927 NGC 5986 Planetarische Nebel: IC 4406 NGC 5873 NGC 5882 NGC 6026 Galaxien: NGC 5530 IC 4444 NGC 5643 zusammengestellt von: GERHARD KERMER NOE VOLKSSTERNWARTE 3074 MICHELBACH NOE AMATEURASTRONOMEN .

Copy Link

Recommended publications

A Basic Requirement for Studying the Heavens Is Determining Where In
Abasic requirement for studying the heavens is determining where in the sky things are. To specify sky positions, astronomers have developed several coordinate systems. Each uses a coordinate grid projected on to the celestial sphere, in analogy to the geographic coordinate system used on the surface of the Earth. The coordinate systems differ only in their choice of the fundamental plane, which divides the sky into two equal hemispheres along a great circle (the fundamental plane of the geographic system is the Earth's equator) . Each coordinate system is named for its choice of fundamental plane. The equatorial coordinate system is probably the most widely used celestial coordinate system. It is also the one most closely related to the geographic coordinate system, because they use the same fun damental plane and the same poles. The projection of the Earth's equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles on to the celest ial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate systems: the geographic system is fixed to the Earth; it rotates as the Earth does . The equatorial system is fixed to the stars, so it appears to rotate across the sky with the stars, but of course it's really the Earth rotating under the fixed sky. The latitudinal (latitude-like) angle of the equatorial system is called declination (Dec for short) . It measures the angle of an object above or below the celestial equator. The longitud inal angle is called the right ascension (RA for short).
[Show full text]
Resolving the Nuclear Obscuring Disk in the Compton-Thick Seyfert Galaxy Ngc 5643 with Alma
Draft version May 11, 2018 Typeset using LATEX twocolumn style in AASTeX61 RESOLVING THE NUCLEAR OBSCURING DISK IN THE COMPTON-THICK SEYFERT GALAXY NGC 5643 WITH ALMA A. Alonso-Herrero,1, 2 M. Pereira-Santaella,2 S. Garc´ıa-Burillo,3 R. I. Davies,4 F. Combes,5 D. Asmus,6, 7 A. Bunker,2 T. D´ıaz-Santos,8 P. Gandhi,7 O. Gonzalez-Mart´ ´ın,9 A. Hernan-Caballero,´ 10 E. Hicks,11 S. Honig,¨ 7 A. Labiano,12 N. A. Levenson,13 C. Packham,14 C. Ramos Almeida,15, 16 C. Ricci,17, 18, 19 D. Rigopoulou,2 D. Rosario,20 E. Sani,6 and M. J. Ward20 1Centro de Astrobiolog´ıa(CAB, CSIC-INTA), ESAC Campus, E-28692 Villanueva de la Ca~nada,Madrid, Spain 2Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, United Kingdom 3Observatorio de Madrid, OAN-IGN, Alfonso XII, 3, E-28014 Madrid, Spain 4Max Planck Institut fuer extraterrestrische Physik Postfach 1312, 85741 Garching bei Muenchen, Germany 5LERMA, Obs. de Paris, PSL Research Univ., Collégede France, CNRS, Sorbonne Univ., UPMC, Paris, France 6European Southern Observatory, Casilla 19001, Santiago 19, Chile 7Department of Physics & Astronomy, University of Southampton, Hampshire SO17 1BJ, Southampton, United Kingdom 8Núcleo de Astronom´ıade la Facultad de Ingenier´ıa,Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile 9Instituto de Radioastronom´ıay Astrof´ısica (IRyA-UNAM), 3-72 (Xangari), 8701, Morelia, Mexico 10Departamento de Astrof´ısica y CC. de la Atmósfera, Facultad de CC. F´ısicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain 11Department
[Show full text]
Outflows in the Seyfert 2 Galaxy NGC 5643 Traced By
Publications of the Astronomical Society of Australia (2018), 35, e040, 8 pages doi:10.1017/pasa.2018.31 Research Paper Outflows in the Seyfert 2 galaxy NGC 5643 traced by the [S III] emission Rogemar A. Riffel1,C.Hekatelyne1 and Izabel C. Freitas1,2 1Departamento de Física, CCNE, Universidade Federal de Santa Maria, Santa Maria, 97105-900 RS, Brazil and 2Colégio Politécnico, Universidade Federal de Santa Maria, Santa Maria, 97105-900 RS, Brazil Abstract We use Gemini Multi-Object Spectrograph Integral Field Unit observations of the inner 285 × 400 pc2 region of the Seyfert 2 galaxy NGC 5643 to map the [S III]λ9069 emission line flux distribution and kinematics, as well as the stellar kinematics, derived by fitting the Ca IIλλλ8498,8542,8662 triplet, at a spatial resolution of 45 pc. The stellar velocity field shows regular rotation, with a projected velocity of − ◦ − 100 km s 1 and kinematic major axis along a position angle of –36 . A ring of low stellar velocity dispersion values (∼70 km s 1), attributed to young/intermediate age stellar populations, is seen surrounding the nucleus with a radius of 50 pc. We found that the [S III] flux distribu- tion shows an elongated structure along the east–west direction and its kinematics is dominated by outflows within a bi-cone at an ionised − gas outflow rate of 0.3 M yr 1. In addition, velocity slices across the [S III]λ9069 emission line reveal a kinematic component attributed to rotation of gas in the plane of the galaxy. Keywords: galaxies: active – galaxies: individual (NGC 5643) – galaxies: kinematics – galaxies: Seyfert (Received April 10, 2018; revised 7 July 2018; accepted August 16, 2018) 1.
[Show full text]
SPIRIT Target Lists
JANUARY and FEBRUARY deep sky objects JANUARY FEBRUARY OBJECT RA (2000) DECL (2000) OBJECT RA (2000) DECL (2000) Category 1 (west of meridian) Category 1 (west of meridian) NGC 1532 04h 12m 04s -32° 52' 23" NGC 1792 05h 05m 14s -37° 58' 47" NGC 1566 04h 20m 00s -54° 56' 18" NGC 1532 04h 12m 04s -32° 52' 23" NGC 1546 04h 14m 37s -56° 03' 37" NGC 1672 04h 45m 43s -59° 14' 52" NGC 1313 03h 18m 16s -66° 29' 43" NGC 1313 03h 18m 15s -66° 29' 51" NGC 1365 03h 33m 37s -36° 08' 27" NGC 1566 04h 20m 01s -54° 56' 14" NGC 1097 02h 46m 19s -30° 16' 32" NGC 1546 04h 14m 37s -56° 03' 37" NGC 1232 03h 09m 45s -20° 34' 45" NGC 1433 03h 42m 01s -47° 13' 19" NGC 1068 02h 42m 40s -00° 00' 48" NGC 1792 05h 05m 14s -37° 58' 47" NGC 300 00h 54m 54s -37° 40' 57" NGC 2217 06h 21m 40s -27° 14' 03" Category 1 (east of meridian) Category 1 (east of meridian) NGC 1637 04h 41m 28s -02° 51' 28" NGC 2442 07h 36m 24s -69° 31' 50" NGC 1808 05h 07m 42s -37° 30' 48" NGC 2280 06h 44m 49s -27° 38' 20" NGC 1792 05h 05m 14s -37° 58' 47" NGC 2292 06h 47m 39s -26° 44' 47" NGC 1617 04h 31m 40s -54° 36' 07" NGC 2325 07h 02m 40s -28° 41' 52" NGC 1672 04h 45m 43s -59° 14' 52" NGC 3059 09h 50m 08s -73° 55' 17" NGC 1964 05h 33m 22s -21° 56' 43" NGC 2559 08h 17m 06s -27° 27' 25" NGC 2196 06h 12m 10s -21° 48' 22" NGC 2566 08h 18m 46s -25° 30' 02" NGC 2217 06h 21m 40s -27° 14' 03" NGC 2613 08h 33m 23s -22° 58' 22" NGC 2442 07h 36m 20s -69° 31' 29" Category 2 Category 2 M 42 05h 35m 17s -05° 23' 25" M 42 05h 35m 17s -05° 23' 25" NGC 2070 05h 38m 38s -69° 05' 39" NGC 2070 05h 38m 38s -69°
[Show full text]
190 Index of Names
Index of names Ancora Leonis 389 NGC 3664, Arp 005 Andriscus Centauri 879 IC 3290 Anemodes Ceti 85 NGC 0864 Name CMG Identification Angelica Canum Venaticorum 659 NGC 5377 Accola Leonis 367 NGC 3489 Angulatus Ursae Majoris 247 NGC 2654 Acer Leonis 411 NGC 3832 Angulosus Virginis 450 NGC 4123, Mrk 1466 Acritobrachius Camelopardalis 833 IC 0356, Arp 213 Angusticlavia Ceti 102 NGC 1032 Actenista Apodis 891 IC 4633 Anomalus Piscis 804 NGC 7603, Arp 092, Mrk 0530 Actuosus Arietis 95 NGC 0972 Ansatus Antliae 303 NGC 3084 Aculeatus Canum Venaticorum 460 NGC 4183 Antarctica Mensae 865 IC 2051 Aculeus Piscium 9 NGC 0100 Antenna Australis Corvi 437 NGC 4039, Caldwell 61, Antennae, Arp 244 Acutifolium Canum Venaticorum 650 NGC 5297 Antenna Borealis Corvi 436 NGC 4038, Caldwell 60, Antennae, Arp 244 Adelus Ursae Majoris 668 NGC 5473 Anthemodes Cassiopeiae 34 NGC 0278 Adversus Comae Berenices 484 NGC 4298 Anticampe Centauri 550 NGC 4622 Aeluropus Lyncis 231 NGC 2445, Arp 143 Antirrhopus Virginis 532 NGC 4550 Aeola Canum Venaticorum 469 NGC 4220 Anulifera Carinae 226 NGC 2381 Aequanimus Draconis 705 NGC 5905 Anulus Grahamianus Volantis 955 ESO 034-IG011, AM0644-741, Graham's Ring Aequilibrata Eridani 122 NGC 1172 Aphenges Virginis 654 NGC 5334, IC 4338 Affinis Canum Venaticorum 449 NGC 4111 Apostrophus Fornac 159 NGC 1406 Agiton Aquarii 812 NGC 7721 Aquilops Gruis 911 IC 5267 Aglaea Comae Berenices 489 NGC 4314 Araneosus Camelopardalis 223 NGC 2336 Agrius Virginis 975 MCG -01-30-033, Arp 248, Wild's Triplet Aratrum Leonis 323 NGC 3239, Arp 263 Ahenea
[Show full text]
Deep Sky Explorer Atlas
Deep Sky Explorer Atlas Reference manual Star charts for the southern skies Compiled by Auke Slotegraaf and distributed under an Attribution-Noncommercial 3.0 Creative Commons license. Version 0.20, January 2009 Deep Sky Explorer Atlas Introduction Deep Sky Explorer Atlas Reference manual The Deep Sky Explorer’s Atlas consists of 30 wide-field star charts, from the south pole to declination +45°, showing all stars down to 8th magnitude and over 1 000 deep sky objects. The design philosophy of the Atlas was to depict the night sky as it is seen, without the clutter of constellation boundary lines, RA/Dec fiducial markings, or other labels. However, constellations are identified by their standard three-letter abbreviations as a minimal aid to orientation. Those wishing to use charts showing an array of invisible lines, numbers and letters will find elsewhere a wide selection of star charts; these include the Herald-Bobroff Astroatlas, the Cambridge Star Atlas, Uranometria 2000.0, and the Millenium Star Atlas. The Deep Sky Explorer Atlas is very much for the explorer. Special mention should be made of the excellent charts by Toshimi Taki and Andrew L. Johnson. Both are free to download and make ideal complements to this Atlas. Andrew Johnson’s wide-field charts include constellation figures and stellar designations and are highly recommended for learning the constellations. They can be downloaded from http://www.cloudynights.com/item.php?item_id=1052 Toshimi Taki has produced the excellent “Taki’s 8.5 Magnitude Star Atlas” which is a serious competitor for the commercial Uranometria atlas. His atlas has 149 charts and is available from http://www.asahi-net.or.jp/~zs3t-tk/atlas_85/atlas_85.htm Suggestions on how to use the Atlas Because the Atlas is distributed in digital format, its pages can be printed on a standard laser printer as needed.
[Show full text]
Ngc Catalogue Ngc Catalogue
NGC CATALOGUE NGC CATALOGUE 1 NGC CATALOGUE Object # Common Name Type Constellation Magnitude RA Dec NGC 1 - Galaxy Pegasus 12.9 00:07:16 27:42:32 NGC 2 - Galaxy Pegasus 14.2 00:07:17 27:40:43 NGC 3 - Galaxy Pisces 13.3 00:07:17 08:18:05 NGC 4 - Galaxy Pisces 15.8 00:07:24 08:22:26 NGC 5 - Galaxy Andromeda 13.3 00:07:49 35:21:46 NGC 6 NGC 20 Galaxy Andromeda 13.1 00:09:33 33:18:32 NGC 7 - Galaxy Sculptor 13.9 00:08:21 -29:54:59 NGC 8 - Double Star Pegasus - 00:08:45 23:50:19 NGC 9 - Galaxy Pegasus 13.5 00:08:54 23:49:04 NGC 10 - Galaxy Sculptor 12.5 00:08:34 -33:51:28 NGC 11 - Galaxy Andromeda 13.7 00:08:42 37:26:53 NGC 12 - Galaxy Pisces 13.1 00:08:45 04:36:44 NGC 13 - Galaxy Andromeda 13.2 00:08:48 33:25:59 NGC 14 - Galaxy Pegasus 12.1 00:08:46 15:48:57 NGC 15 - Galaxy Pegasus 13.8 00:09:02 21:37:30 NGC 16 - Galaxy Pegasus 12.0 00:09:04 27:43:48 NGC 17 NGC 34 Galaxy Cetus 14.4 00:11:07 -12:06:28 NGC 18 - Double Star Pegasus - 00:09:23 27:43:56 NGC 19 - Galaxy Andromeda 13.3 00:10:41 32:58:58 NGC 20 See NGC 6 Galaxy Andromeda 13.1 00:09:33 33:18:32 NGC 21 NGC 29 Galaxy Andromeda 12.7 00:10:47 33:21:07 NGC 22 - Galaxy Pegasus 13.6 00:09:48 27:49:58 NGC 23 - Galaxy Pegasus 12.0 00:09:53 25:55:26 NGC 24 - Galaxy Sculptor 11.6 00:09:56 -24:57:52 NGC 25 - Galaxy Phoenix 13.0 00:09:59 -57:01:13 NGC 26 - Galaxy Pegasus 12.9 00:10:26 25:49:56 NGC 27 - Galaxy Andromeda 13.5 00:10:33 28:59:49 NGC 28 - Galaxy Phoenix 13.8 00:10:25 -56:59:20 NGC 29 See NGC 21 Galaxy Andromeda 12.7 00:10:47 33:21:07 NGC 30 - Double Star Pegasus - 00:10:51 21:58:39
[Show full text]
New H2O Masers in Seyfert and FIR Bright Galaxies IV
A&A 525, A91 (2011) Astronomy DOI: 10.1051/0004-6361/201014714 & c ESO 2010 Astrophysics New H2O masers in Seyfert and FIR bright galaxies IV. Interferometric follow-ups A. Tarchi1,P.Castangia1,C.Henkel2,G.Surcis3,, and K. M. Menten2 1 INAF-Osservatorio Astronomico di Cagliari, Loc. Poggio dei Pini, Strada 54, 09012 Capoterra (CA), Italy e-mail: [email protected] 2 Max-Planck-Insitut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany 3 Argelander-Institut für Astronomie der Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany Received 1 April 2010 / Accepted 23 August 2010 ABSTRACT Context. Very luminous extragalactic water masers, the megamasers, are associated with active galactic nuclei (AGN) in galaxies characterized by accretion disks, radio jets, and nuclear outﬂows. Weaker masers, the kilomasers, seem to be related mostly to star formation activity, although the possibility exists that some of these sources may belong to the weak tail of the AGN maser distribution. Aims. It is particularly important to accurately locate the water maser emission to reveal its origin and shed light on extragalactic star- forming activity or to elucidate the highly obscured central regions of galaxies. Methods. We performed interferometric observations of three galaxies, NGC 3556, Arp 299, and NGC 4151, where water emission was found. Statistical tools were used to study the relation between OH and H2O maser emission in galaxies. Results. The maser in NGC 3556 is associated with a compact radio continuum source that is most likely a supernova remnant or radio supernova. In Arp 299, the luminous water maser has been decomposed in three main emitting regions associated with the nuclear regions of the two main galaxies of the system, NGC 3690 and IC 694, and the region of overlap.
[Show full text]
Skytools Chart
36 Ara - Pavo SkyTools 3 / Skyhound.com 2 ζ 6541 NGC 6231 ζ NGC 6124 θ NGC 6322 η η 6496 ζ 1 6388 PK 345-04.1 -4 NGC 6259 NGC 6192 0° 1 ε NGC 6249 ι 1 δ α PK 342-04.1 β IC 4699 μ σ Mu Normae Cluster β2 NGC 6250 NGC 6178 NGC 6204 6352 ω NGC 6200 δ ζ λ θ α IC 4651 NGC 6193 ε ι PK 342-14.1 NGC 6134 6584 6326 NGC 6167 2 Ara γ η 6397 γ1 λ ε1 NGC 6152 α NGC 6208 1 ν μ β 5946 γ ζ NGC 6067 -50° ξ PK 331-05.1 κ 5927 PK 329-02.2 η ζ η NGC 6087 NGC 5999 NGC 5925 Pavo Globular δ 6221 ι1 ξ Collinder 292 α NGC 5822 ν λ 6300 NGC 5823 NGC 6025 π NGC 5749 6744 η PK 325-12.1 γ β β φ1 Pavo δ β NGC 5662 ρ 6362 κ ζ Circinus δ Triangulum Australe ε α Rigel Kentaurus ε 5844 2 -6 α 0 ° β NGC 5617 ζ ζ α Agena 6101 γ γ NGC 5316 ε Apus PK 315-13.1 -7 0° NGC 5281 2 1h h 5 52° x 34° 1 18h 18h00m00.0s -60°00'00" (Skymark) Globular Cl. Dark Neb. Galaxy 8 7 6 5 4 3 2 1 Globule Planetary Open Cl. Nebula 36 Ara - Pavo GALASSIE Sigla Nome Cost. A.R. Dec. Mv. Dim. Tipo Distanza 200/4 80/11,5 20x60 NGC 6221 Ara 16h 52m 47s -59° 12' 59" +10,70 4',6x2',8 Sc 18,0 Mly --- --- --- NGC 6300 Ara 17h 16m 59s -62° 49' 11" +11,00 5',5x3',5 SBb 34,0 Mly --- --- --- NGC 6744 Pav 19h 09m 46s -63° 51' 28" +9,10 17',0x10',7 SABb 21,0 Mly --- --- --- AMMASSI APERTI Sigla Nome Cost.
[Show full text]
The Dunlop Catalogue
The Dunlop Catalogue www.macastro.org.au Catalogue Numbers Type R.A. Dec. Con. Dun 18 NGC 104 GC 00:24:1 -72:05 Tuc Dun 25 NGC 346 BN 00:59:1 -72:11 Tuc Dun 62 NGC 362 GC 01:03:2 -70:51 Tuc Dun 67 NGC 4372 GC 12:25:8 -72:39 Mus Dun 142 NGC 2070 BN 05:38:6 -69:06 Dor Dun 164 NGC 4833 GC 12:59:6 -70:53 Mus Dun 206 NGC 1313 Gal 03:18:2 -66:30 Ret Dun 225 NGC 6362 GC 17:31:9 -67:03 Ara Dun 230 NGC 1763 BN 04:56:8 -66:25 Dor Dun 252 NGC 5189 PN 13:33:5 -65:59 Mus Dun 255 IC 5250 Gal 22:47:3 -65:03 Tuc Dun 262 NGC 6744 Gal 19:09:8 -63:52 Pav Dun 265 NGC 2808 GC 09:12:0 -64:52 Car Dun 273 NGC 5281 OC 13:43:6 -62:55 Cen Dun 282 NGC 5316 OC 13:53:9 -61:52 Cen Dun 289 NGC 3766 OC 11:36:2 -61:36 Cen Dun 292 NGC 4349 OC 12:24:2 -61:52 Cru Dun 295 NGC 6752 GC 19:10:9 -59:59 Pav Dun 296 NGC 1672 Gal 04:45:7 -59:15 Dor Dun 297 NGC 3114 OC 10:02:5 -60:08 Car Dun 301 NGC 4755 OC 12:53:7 -60:22 Cru Dun 302 NGC 5617 OC 14:29:7 -60:43 Cen Dun 304 NGC 6025 OC 16:03:3 -60:26 TrA Dun 306 NGC 1543 Gal 04:12:8 -57:44 Ret Dun 309 NGC 3372 BN 10:45:1 -59:52 Car Dun 321 NGC 3293 OC 10:35:9 -58:14 Car Dun 322 NGC 3324 BN 10:37:4 -58:37 Car Dun 323 NGC 3532 OC 11:05:8 -58:46 Car Dun 330 IC 2488 OC 09:27:6 -57:00 Vel Dun 331 NGC 1553 Gal 04:16:3 -55:47 Dor Dun 335 NGC 6087 OC 16:18:8 -57:56 Nor Dun 337 NGC 1261 GC 03:12:3 -55:13 Hor Dun 338 NGC 1566 Gal 04:20:0 -54:56 Dor Dun 339 NGC 1617 Gal 04:31:7 -54:36 Dor Dun 342 NGC 5662 OC 14:35:6 -56:37 Cen Dun 348 NGC 1515 Gal 04:04:0 -54:06 Dor Dun 360 NGC 6067 OC 16:13:2 -54:13 Nor
[Show full text]
Optical Multicolor Polarization Observations in the Region of the Open Cluster NGC 5749,
A&A 462, 621–626 (2007) Astronomy DOI: 10.1051/0004-6361:20042124 & c ESO 2007 Astrophysics Optical multicolor polarization observations in the region of the open cluster NGC 5749, M. M. Vergne, C. Feinstein, and R. Martínez Facultad de Ciencias Astronómicas y Geofísicas, Observatorio Astronómico, Paseo del Bosque, 1900 La Plata, Argentina e-mail: [email protected] Instituto de Astrofísica de La Plata, CONICET Received 6 October 2004 / Accepted 21 September 2006 ABSTRACT We present (UBVRI) multicolor linear polarimetric data for 31 of the brightest stars in the area of the open cluster NGC 5749 considered to study the properties of the interstellar medium (ISM) towards the cluster. Our data yield a mean polarization percentage 0.8 of PV ∼ 1.7%, close to the polarization value produced by the ISM with normal efficiency (P(%) = 3.5E(B−V) ) for a mean color ◦ excess of EB−V = 0.42. The mean angle of polarization vectors, θ = 74 , agrees quite well with the expected angle produced by dust particles aligned in the direction of the galactic disk (and the magnetic field) in the region. Our analysis indicates that the visual absorption affecting the stars in NGC 5749 is partially produced by a dust layer located up to 300 pc from the Sun and also by a second layer of dust closer to the cluster (located at least at 700 pc). The observed photometry and our polarization data are consistent with the existence of dust within the cluster. We also show in this work how polarimetry could be an excellent technique for identifying nonmember stars.
[Show full text]
June 2018 BRAS Newsletter
Monthly Meeting Monday, June 11th at 7PM at HRPO (Monthly meetings are on 2nd Mondays, Highland Road Park Observatory). Presenter: Tyler Ellis, a graduate assistant for Tabetha Boyajian, with more on Tabby’s Star What's In This Issue? President’s Message Secretary's Summary Outreach Report Astrophotography Group Light Pollution Committee Report “Free The Milky Way” Campaign Recent Forum Entries Members’ Corner – Coy Wagoner’s AL Certificate Messages from the HRPO Friday Night Lecture Series BRAS Showcase Globe at Night American Radio Relay League Field Day Saturnian Opposition Asteroid Day Observing Notes – Lupus – The Wolf & Mythology Like this newsletter? See PAST ISSUES online back to 2009 Visit us on Facebook – Baton Rouge Astronomical Society Newsletter of the Baton Rouge Astronomical Society June 2018 © 2018 President’s Message One of the highlights of May was the opposition of Jupiter. Jupiter and the Galilean moons is a real treat for public outreaches. Comet 46P/Wirtanen was reported at magnitude 20.3 R on 2018-May-08 by Lowell Observatory(MPC Code G37). There are expectations that Wirtanen will brighten to 3rd to 4th magnitude in December 2018. May also saw the recovery (re-discovery) and fly-by of the NEO 2010 WC9. 2010 WC9 was recovered at 2018 05 08.38858 by the Mt. Lemmon Survey (MPC Code G96) and made Close-Approach on 2018-05-15 of 0.00136 AU ( 0.53 LD), 122,150 Miles(196,582 KM), or if the Earth were the size of a basketball, this would be ~12.2 feet (~3.7 Meters). See slide below.
[Show full text]