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A SPECTROSCOPIC AND PHOTOMETRIC STUDY OF THE PLANETARY NEBULAE Kn 61 AND Pa 5
We present the first morpho-kinematical analysis of the planetary nebulae Kn 61 and Pa 5 and explore the nature of their central stars. Our analysis is based on high-resolution and medium-resolution spectroscopic observations, deep narrow-band imaging, and integral photometry. This material allows u...
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Published in: | The Astronomical journal 2014-09, Vol.148 (3), p.1-9 |
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creator | Garcia-Diaz, Ma T Gonzalez-Buitrago, D Lopez, J A Zharikov, S TOVMASSIAN, G Borisov, N VALYAVIN, G |
description | We present the first morpho-kinematical analysis of the planetary nebulae Kn 61 and Pa 5 and explore the nature of their central stars. Our analysis is based on high-resolution and medium-resolution spectroscopic observations, deep narrow-band imaging, and integral photometry. This material allows us to identify the morphological components and study their kinematics. The direct images and spectra indicate an absence of the characteristic [NII] and [SII] emission lines in both nebulae. The nebular spectrum of Kn 61 suggests a hydrogen deficient planetary nebula and the stellar spectrum of the central star reveals a hydrogen-deficient PG 1159-type star. The [OIII] position velocity diagram reveals that Kn 61 is a closed, empty, spherical shell with a thin border and a filamentary surface expanding at 67.6 km s super(-1) and the shell is currently not expanding isotropically. We derived a kinematic age of ~1.6 x 10 super(4) yr for an assumed distance of 4kpc. A photometric period of ~5.7(+ or -0.4) days has been detected for Kn 61, indicating the presence of a possible binary system at its core. A possible link between filamentary spherical shells and PG 1159-type stars is noted. The morphology of Pa 5 is dominated by an equatorial toroid and faint polar extensions. The equatorial region of this planetary nebula is expanding at 45.2km s super(-1). The stellar spectrum corresponds to a very hot star and is dominated by a steep blue rising continuum and He II, Balmer, and Ca II photospheric lines. |
doi_str_mv | 10.1088/0004-6256/148/3/57 |
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A possible link between filamentary spherical shells and PG 1159-type stars is noted. The morphology of Pa 5 is dominated by an equatorial toroid and faint polar extensions. The equatorial region of this planetary nebula is expanding at 45.2km s super(-1). 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Our analysis is based on high-resolution and medium-resolution spectroscopic observations, deep narrow-band imaging, and integral photometry. This material allows us to identify the morphological components and study their kinematics. The direct images and spectra indicate an absence of the characteristic [NII] and [SII] emission lines in both nebulae. The nebular spectrum of Kn 61 suggests a hydrogen deficient planetary nebula and the stellar spectrum of the central star reveals a hydrogen-deficient PG 1159-type star. The [OIII] position velocity diagram reveals that Kn 61 is a closed, empty, spherical shell with a thin border and a filamentary surface expanding at 67.6 km s super(-1) and the shell is currently not expanding isotropically. We derived a kinematic age of ~1.6 x 10 super(4) yr for an assumed distance of 4kpc. A photometric period of ~5.7(+ or -0.4) days has been detected for Kn 61, indicating the presence of a possible binary system at its core. A possible link between filamentary spherical shells and PG 1159-type stars is noted. The morphology of Pa 5 is dominated by an equatorial toroid and faint polar extensions. The equatorial region of this planetary nebula is expanding at 45.2km s super(-1). The stellar spectrum corresponds to a very hot star and is dominated by a steep blue rising continuum and He II, Balmer, and Ca II photospheric lines.</description><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>DISTANCE</subject><subject>EMISSION</subject><subject>HYDROGEN</subject><subject>Imaging</subject><subject>Kinematics</subject><subject>PHOTOMETRY</subject><subject>PLANETARY NEBULAE</subject><subject>RESOLUTION</subject><subject>SPECTRA</subject><subject>Spectroscopic analysis</subject><subject>SPECTROSCOPY</subject><subject>SPHERICAL CONFIGURATION</subject><subject>Spherical shells</subject><subject>STARS</subject><subject>SURFACES</subject><subject>VELOCITY</subject><issn>0004-6256</issn><issn>1538-3881</issn><issn>1538-3881</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqN0T1PwzAQBmALgUQp_AEmSywsIf5M7DGkKa1Im6hNh05W4toiqG1KnA78e1IFMTOdTnruTnoPgEeMXjASwkcIMS8gPPAxEz71eXgFRphT4VEh8DUY_YFbcOfcJ0IYC8RGYBHBdZ7ExSpbx1k-j2G0nMB8lhXZIilWfb8uNpMtzKawmCUwT6NlUkSrLVwmr5s0SuD7EQZ4GCohvwc3ttw78_Bbx2AzTYp45qXZ2zyOUk9TwTuvMlJWEklEJBOCc6RpRfCusoYQEXJmOdXaGGLC0BrJdiTUld1ZSwlFoQgsHYOnYW_julo5XXdGf-jmeDS6U4RQRgiXvXoe1Kltvs7GdepQO232-_JomrNTOAik6O-J8D8UMcooDXpKBqrbxrnWWHVq60PZfiuM1OUZ6pK1umSt-mcoqnhIfwBov3NM</recordid><startdate>20140901</startdate><enddate>20140901</enddate><creator>Garcia-Diaz, Ma T</creator><creator>Gonzalez-Buitrago, D</creator><creator>Lopez, J A</creator><creator>Zharikov, S</creator><creator>TOVMASSIAN, G</creator><creator>Borisov, N</creator><creator>VALYAVIN, G</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20140901</creationdate><title>A SPECTROSCOPIC AND PHOTOMETRIC STUDY OF THE PLANETARY NEBULAE Kn 61 AND Pa 5</title><author>Garcia-Diaz, Ma T ; Gonzalez-Buitrago, D ; Lopez, J A ; Zharikov, S ; TOVMASSIAN, G ; Borisov, N ; VALYAVIN, G</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c385t-be99b909029488550c3b21dbfe228754f53ccee2e77fe94d27cbfdff3230786f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>DISTANCE</topic><topic>EMISSION</topic><topic>HYDROGEN</topic><topic>Imaging</topic><topic>Kinematics</topic><topic>PHOTOMETRY</topic><topic>PLANETARY NEBULAE</topic><topic>RESOLUTION</topic><topic>SPECTRA</topic><topic>Spectroscopic analysis</topic><topic>SPECTROSCOPY</topic><topic>SPHERICAL CONFIGURATION</topic><topic>Spherical shells</topic><topic>STARS</topic><topic>SURFACES</topic><topic>VELOCITY</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Garcia-Diaz, Ma T</creatorcontrib><creatorcontrib>Gonzalez-Buitrago, D</creatorcontrib><creatorcontrib>Lopez, J A</creatorcontrib><creatorcontrib>Zharikov, S</creatorcontrib><creatorcontrib>TOVMASSIAN, G</creatorcontrib><creatorcontrib>Borisov, N</creatorcontrib><creatorcontrib>VALYAVIN, G</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astronomical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Garcia-Diaz, Ma T</au><au>Gonzalez-Buitrago, D</au><au>Lopez, J A</au><au>Zharikov, S</au><au>TOVMASSIAN, G</au><au>Borisov, N</au><au>VALYAVIN, G</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A SPECTROSCOPIC AND PHOTOMETRIC STUDY OF THE PLANETARY NEBULAE Kn 61 AND Pa 5</atitle><jtitle>The Astronomical journal</jtitle><date>2014-09-01</date><risdate>2014</risdate><volume>148</volume><issue>3</issue><spage>1</spage><epage>9</epage><pages>1-9</pages><issn>0004-6256</issn><issn>1538-3881</issn><eissn>1538-3881</eissn><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><abstract>We present the first morpho-kinematical analysis of the planetary nebulae Kn 61 and Pa 5 and explore the nature of their central stars. Our analysis is based on high-resolution and medium-resolution spectroscopic observations, deep narrow-band imaging, and integral photometry. This material allows us to identify the morphological components and study their kinematics. The direct images and spectra indicate an absence of the characteristic [NII] and [SII] emission lines in both nebulae. The nebular spectrum of Kn 61 suggests a hydrogen deficient planetary nebula and the stellar spectrum of the central star reveals a hydrogen-deficient PG 1159-type star. The [OIII] position velocity diagram reveals that Kn 61 is a closed, empty, spherical shell with a thin border and a filamentary surface expanding at 67.6 km s super(-1) and the shell is currently not expanding isotropically. We derived a kinematic age of ~1.6 x 10 super(4) yr for an assumed distance of 4kpc. A photometric period of ~5.7(+ or -0.4) days has been detected for Kn 61, indicating the presence of a possible binary system at its core. A possible link between filamentary spherical shells and PG 1159-type stars is noted. The morphology of Pa 5 is dominated by an equatorial toroid and faint polar extensions. The equatorial region of this planetary nebula is expanding at 45.2km s super(-1). The stellar spectrum corresponds to a very hot star and is dominated by a steep blue rising continuum and He II, Balmer, and Ca II photospheric lines.</abstract><cop>United States</cop><doi>10.1088/0004-6256/148/3/57</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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subjects | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY DISTANCE EMISSION HYDROGEN Imaging Kinematics PHOTOMETRY PLANETARY NEBULAE RESOLUTION SPECTRA Spectroscopic analysis SPECTROSCOPY SPHERICAL CONFIGURATION Spherical shells STARS SURFACES VELOCITY |
title | A SPECTROSCOPIC AND PHOTOMETRIC STUDY OF THE PLANETARY NEBULAE Kn 61 AND Pa 5 |
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