Search

Start Over Subject planetary nebulae Capability Type Simple Cone Search
101. M31 planetary nebulae
ID:
ivo://CDS.VizieR/J/ApJS/38/351
Title:
M31 planetary nebulae
Short Name:
J/ApJS/38/351
Date:
21 Oct 2021
Publisher:
CDS
Description:
Finding charts and equatorial coordinates are presented for 311 planetary nebulae and for nearby reference stars in the Andromeda galaxy (M31). The standard deviation of the coordinates relative to the AGK3 is smaller than 1.0". The standard deviation of the coordinates relative to the reference stars is smaller than 0.5".
102. M 104 planetary nebulae
ID:
ivo://CDS.VizieR/J/ApJ/458/455
Title:
M 104 planetary nebulae
Short Name:
J/ApJ/458/455
Date:
21 Oct 2021
Publisher:
CDS
Description:
We used the CTIO 4m telescope to make a complete and kinematically unbiased survey of M104 (NGC 4594; the Sombrero galaxy) for planetary nebulae (i.e., stars) out to 16 kpc. We present the positions and monochromatic [O III] lambda 5007 magnitudes of 294 planetaries, and use the observed planetary nebula luminosity function (PNLF) to measure a distance of 8.9+/-0.6Mpc to the galaxy. The luminosity-specific PN number lambda 2.5 in the halo of M104 is approximately 21.7x10^-9^L_{sun}_, which for its color (B-V)=0.95, is comparable to the values in other galaxies. We use the PNLF distance to M104 to compare its luminosity to the luminosities of the brightest galaxies in the Virgo Cluster, finding that if M104 were in the Virgo Cluster, it would be the third brightest galaxy. We combined the PNLF distance and the observed velocity corrected for Virgo infall to calculate a Hubble constant H_0_=91+/-8km/s/Mpc. We also used the PNLF distances to the NGC 1023 group, the Leo group, the Virgo Cluster, and the Fornax Cluster to derive Hubble constants corrected for Virgo infall. The values of H_0_ for M104, the NGC 1023 group, the Virgo Cluster, and the Fornax Cluster are in excellent agreement, suggesting that the PNLF distances and Schechter's linear infall model provide a self-consistent representation of the Hubble expansion and Virgo infall within most regions of the local supercluster. The unweighted mean of the four values is H_0_=84+/-4. The value of H_0_ derived for the Leo group differs by four standard deviations from the mean of the other four measurements. We conclude that there may be large peculiar motions in the spatially extended Leo spur.
103. M87 planetary nebulae
ID:
ivo://CDS.VizieR/J/ApJ/492/62
Title:
M87 planetary nebulae
Short Name:
J/ApJ/492/62
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of a wide-field [O III] {lambda}5007 survey for planetary nebulae (PN) in M87 and its surrounding halo. In all, we identify 338 PN candidates in a 16'x16' field around the galaxy; 187 of these objects are in a statistical sample that extends to m5007=27.15.
104. M31 planetary nebulae velocities
ID:
ivo://CDS.VizieR/J/MNRAS/369/97
Title:
M31 planetary nebulae velocities
Short Name:
J/MNRAS/369/97
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present radial velocities for a sample of 721 planetary nebulae in the disc and bulge of M31, measured using the WYFFOS fibre spectrograph on the William Herschel Telescope. Velocities are determined using the [OIII] {lambda}5007 emission line. Rotation and velocity dispersion are measured to a radius of 50arcmin (11.5kpc), the first stellar rotation curve and velocity dispersion profile for M31 to such a radius. Our kinematics are consistent with rotational support at radii well beyond the bulge effective radius of 1.4kpc, although our data beyond a radius of 5kpc are limited. We present tentative evidence for kinematic substructure in the bulge of M31 to be studied fully in a later work. This paper is part of an ongoing project to constrain the total mass, mass distribution and velocity anisotropy of the disc, bulge and halo of M31.
105. New and Misclassified Planetary Nebulae
ID:
ivo://CDS.VizieR/J/AN/318/35
Title:
New and Misclassified Planetary Nebulae
Short Name:
J/AN/318/35
Date:
21 Oct 2021
Publisher:
CDS
Description:
Altogether 86 objects discovered in the the period 1991-1994 have been accepted by the author as new PN (Table 1). In appendices A and B to this table the lists of possible pre-PN as well as possible post-PN, respectively, are given. Table 2 presents 56 misclassified objects which we suggest removing from CGPN.
106. New classification of young planetary nebulae
ID:
ivo://CDS.VizieR/J/AJ/141/134
Title:
New classification of young planetary nebulae
Short Name:
J/AJ/141/134
Date:
21 Oct 2021
Publisher:
CDS
Description:
Using Hubble Space Telescope images of 119 young planetary nebulae (PNs), most of which have not previously been published, we have devised a comprehensive morphological classification system for these objects. This system generalizes a recently devised system for pre-planetary nebulae, which are the immediate progenitors of PNs. Unlike previous classification studies, we have focused primarily on young PNs rather than all PNs, because the former best show the influences or symmetries imposed on them by the dominant physical processes operating at the first and primary stage of the shaping process. Older PNs develop instabilities, interact with the ambient interstellar medium, and are subject to the passage of photoionization fronts, all of which obscure the underlying symmetries and geometries imposed early on. Our classification system is designed to suffer minimal prejudice regarding the underlying physical causes of the different shapes and structures seen in our PN sample, however, in many cases, physical causes are readily suggested by the geometry, along with the kinematics that have been measured in some systems. Secondary characteristics in our system, such as ansae, indicate the impact of a jet upon a slower-moving, prior wind; a waist is the signature of a strong equatorial concentration of matter, whether it be outflowing or in a bound Keplerian disk, and point symmetry indicates a secular trend, presumably precession, in the orientation of the central driver of a rapid, collimated outflow.
107. New galactic bulge PNe
ID:
ivo://CDS.VizieR/J/A+A/373/536
Title:
New galactic bulge PNe
Short Name:
J/A+A/373/536
Date:
21 Oct 2021
Publisher:
CDS
Description:
We observed 64 newly identified galactic bulge planetary nebulae in the radio continuum at 3 and 6 cm with the Australia Telescope Compact Array. We present their radio images, positions, flux densities, and angular sizes. The survey appears to have detected a larger ratio of more extended planetary nebulae with low surface brightness than in previous surveys. We calculated their distances according to Van de Steene & Zijlstra (1995A&A...293..541V). We find that most of the new sample is located on the near side around the galactic center and closer in than the previously known bulge PNe. Based on H{alpha} images and spectroscopic data, we calculated the total H{alpha} flux. We compare this flux value with the radio flux density and derive the extinction. We confirm that the distribution of the extinction values around the galactic center rises toward the center, as expected.
108. New planetary nebulae
ID:
ivo://CDS.VizieR/J/other/LAstr/91.26
Title:
New planetary nebulae
Short Name:
J/other/LAstr/91
Date:
21 Oct 2021
Publisher:
CDS
Description:
List of all new planetary nebulae discovered by French amateurs (from 2016, Lastr, 91, 26) and nebulae in the mid-infrared (from 2016, LAstr, 91 36).
109. New planetary nebulae
ID:
ivo://CDS.VizieR/J/other/LAstr/80.42
Title:
New planetary nebulae
Short Name:
J/other/LAstr/80
Date:
21 Oct 2021
Publisher:
CDS
Description:
List of new planetary nebulae discovered by French amateurs.
110. New planetary nebulae candidates
ID:
ivo://CDS.VizieR/J/other/LAstr/102.46
Title:
New planetary nebulae candidates
Short Name:
J/other/LAstr/10
Date:
21 Oct 2021
Publisher:
CDS
Description:
List of all new planetary nebulae discovered by French amateurs.

Limit your search

more »

  • 2208